basic enter hook command

2026-04-26 02:33:20 +03:00 · 2024-05-12 02:09:43 +02:00
32 changed files with 320 additions and 769 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1284,7 +1284,7 @@ dependencies = [

 [[package]]
 name = "lan-mouse"
-version = "0.8.0"
+version = "0.7.3"
 dependencies = [
 "anyhow",
 "ashpd",
@@ -1292,7 +1292,6 @@ dependencies = [
 "async-trait",
 "clap",
 "core-graphics",
- "endi",
 "env_logger",
 "futures",
 "futures-core",
@@ -1312,7 +1311,6 @@ dependencies = [
 "serde_json",
 "slab",
 "tempfile",
- "thiserror",
 "tokio",
 "toml",
 "wayland-client",
@@ -2012,18 +2010,18 @@ dependencies = [

 [[package]]
 name = "thiserror"
-version = "1.0.61"
+version = "1.0.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c546c80d6be4bc6a00c0f01730c08df82eaa7a7a61f11d656526506112cc1709"
+checksum = "03468839009160513471e86a034bb2c5c0e4baae3b43f79ffc55c4a5427b3297"
 dependencies = [
 "thiserror-impl",
 ]

 [[package]]
 name = "thiserror-impl"
-version = "1.0.61"
+version = "1.0.58"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46c3384250002a6d5af4d114f2845d37b57521033f30d5c3f46c4d70e1197533"
+checksum = "c61f3ba182994efc43764a46c018c347bc492c79f024e705f46567b418f6d4f7"
 dependencies = [
 "proc-macro2",
 "quote",
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "lan-mouse"
 description = "Software KVM Switch / mouse & keyboard sharing software for Local Area Networks"
-version = "0.8.0"
+version = "0.7.3"
 edition = "2021"
 license = "GPL-3.0-or-later"
 repository = "https://github.com/ferdinandschober/lan-mouse"
@@ -35,8 +35,6 @@ once_cell = "1.19.0"
 num_enum = "0.7.2"
 hostname = "0.4.0"
 slab = "0.4.9"
-endi = "1.1.0"
-thiserror = "1.0.61"

 [target.'cfg(unix)'.dependencies]
 libc = "0.2.148"
--- a/README.md
+++ b/README.md
@@ -69,15 +69,7 @@ Precompiled release binaries for Windows, MacOS and Linux are available in the [
 For Windows, the depenedencies are included in the .zip file, for other operating systems see [Installing Dependencies](#installing-dependencies).

 ### Arch Linux
-
-Lan Mouse can be installed from the [official repositories](https://archlinux.org/packages/extra/x86_64/lan-mouse/):
-
-```sh
-pacman -S lan-mouse
-```
-
-It is also available on the AUR:
-
+Lan Mouse is available on the AUR:
 ```sh
 # git version (includes latest changes)
 paru -S lan-mouse-git
--- a/config.toml
+++ b/config.toml
@@ -1,7 +1,5 @@
 # example configuration

-# capture_backend = "LayerShell"
-
 # release bind
 release_bind = [ "KeyA", "KeyS", "KeyD", "KeyF" ]

--- a/flake.lock
+++ b/flake.lock
@@ -20,11 +20,11 @@
    },
    "nixpkgs": {
      "locked": {
-        "lastModified": 1716293225,
-        "narHash": "sha256-pU9ViBVE3XYb70xZx+jK6SEVphvt7xMTbm6yDIF4xPs=",
+        "lastModified": 1710806803,
+        "narHash": "sha256-qrxvLS888pNJFwJdK+hf1wpRCSQcqA6W5+Ox202NDa0=",
        "owner": "nixos",
        "repo": "nixpkgs",
-        "rev": "3eaeaeb6b1e08a016380c279f8846e0bd8808916",
+        "rev": "b06025f1533a1e07b6db3e75151caa155d1c7eb3",
        "type": "github"
      },
      "original": {
@@ -48,11 +48,11 @@
        ]
      },
      "locked": {
-        "lastModified": 1716257780,
-        "narHash": "sha256-R+NjvJzKEkTVCmdrKRfPE4liX/KMGVqGUwwS5H8ET8A=",
+        "lastModified": 1710987136,
+        "narHash": "sha256-Q8GRdlAIKZ8tJUXrbcRO1pA33AdoPfTUirsSnmGQnOU=",
        "owner": "oxalica",
        "repo": "rust-overlay",
-        "rev": "4e5e3d2c5c9b2721bd266f9e43c14e96811b89d2",
+        "rev": "97596b54ac34ad8184ca1eef44b1ec2e5c2b5f9e",
        "type": "github"
      },
      "original": {
--- a/nix/default.nix
+++ b/nix/default.nix
@@ -2,14 +2,10 @@
  rustPlatform,
  lib,
  pkgs,
-}: let
-  cargoToml = builtins.fromTOML (builtins.readFile ../Cargo.toml);
-  pname = cargoToml.package.name;
-  version = cargoToml.package.version;
-in
+}:
 rustPlatform.buildRustPackage {
-  pname = pname;
-  version = version;
+  pname = "lan-mouse";
+  version = "0.7.0";

  nativeBuildInputs = with pkgs; [
    pkg-config
@@ -27,7 +23,7 @@ rustPlatform.buildRustPackage {
  ];

  src = builtins.path {
-    name = pname;
+    name = "lan-mouse";
    path = lib.cleanSource ../.;
  };

@@ -42,7 +38,7 @@ rustPlatform.buildRustPackage {
      Lan Mouse is a mouse and keyboard sharing software similar to universal-control on Apple devices. It allows for using multiple pcs with a single set of mouse and keyboard. This is also known as a Software KVM switch.
      The primary target is Wayland on Linux but Windows and MacOS and Linux on Xorg have partial support as well (see below for more details).
    '';
-    mainProgram = pname;
+    mainProgram = "lan-mouse";
    platforms = platforms.all;
  };
 }
--- a/src/capture.rs
+++ b/src/capture.rs
@@ -4,14 +4,9 @@ use futures_core::Stream;

 use crate::{
    client::{ClientEvent, ClientHandle},
-    config::CaptureBackend,
    event::Event,
 };

-use self::error::CaptureCreationError;
-
-pub mod error;
-
 #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
 pub mod libei;

@@ -30,57 +25,48 @@ pub mod x11;
 /// fallback input capture (does not produce events)
 pub mod dummy;

-pub async fn create_backend(
-    backend: CaptureBackend,
-) -> Result<Box<dyn InputCapture<Item = io::Result<(ClientHandle, Event)>>>, CaptureCreationError> {
-    match backend {
-        #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-        CaptureBackend::InputCapturePortal => Ok(Box::new(libei::LibeiInputCapture::new().await?)),
-        #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-        CaptureBackend::LayerShell => Ok(Box::new(wayland::WaylandInputCapture::new()?)),
-        #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-        CaptureBackend::X11 => Ok(Box::new(x11::X11InputCapture::new()?)),
-        #[cfg(windows)]
-        CaptureBackend::Windows => Ok(Box::new(windows::WindowsInputCapture::new())),
-        #[cfg(target_os = "macos")]
-        CaptureBackend::MacOs => Ok(Box::new(macos::MacOSInputCapture::new()?)),
-        CaptureBackend::Dummy => Ok(Box::new(dummy::DummyInputCapture::new())),
-    }
-}
-
-pub async fn create(
-    backend: Option<CaptureBackend>,
-) -> Result<Box<dyn InputCapture<Item = io::Result<(ClientHandle, Event)>>>, CaptureCreationError> {
-    if let Some(backend) = backend {
-        let b = create_backend(backend).await;
-        if b.is_ok() {
-            log::info!("using capture backend: {backend}");
-        }
-        return b;
+pub async fn create() -> Box<dyn InputCapture<Item = io::Result<(ClientHandle, Event)>>> {
+    #[cfg(target_os = "macos")]
+    match macos::MacOSInputCapture::new() {
+        Ok(p) => return Box::new(p),
+        Err(e) => log::info!("macos input capture not available: {e}"),
    }

-    for backend in [
-        #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-        CaptureBackend::InputCapturePortal,
-        #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-        CaptureBackend::LayerShell,
-        #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-        CaptureBackend::X11,
-        #[cfg(windows)]
-        CaptureBackend::Windows,
-        #[cfg(target_os = "macos")]
-        CaptureBackend::MacOs,
-        CaptureBackend::Dummy,
-    ] {
-        match create_backend(backend).await {
-            Ok(b) => {
-                log::info!("using capture backend: {backend}");
-                return Ok(b);
-            }
-            Err(e) => log::warn!("{backend} input capture backend unavailable: {e}"),
-        }
+    #[cfg(windows)]
+    match windows::WindowsInputCapture::new() {
+        Ok(p) => return Box::new(p),
+        Err(e) => log::info!("windows input capture not available: {e}"),
    }
-    Err(CaptureCreationError::NoAvailableBackend)
+
+    #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
+    match libei::LibeiInputCapture::new().await {
+        Ok(p) => {
+            log::info!("using libei input capture");
+            return Box::new(p);
+        }
+        Err(e) => log::info!("libei input capture not available: {e}"),
+    }
+
+    #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
+    match wayland::WaylandInputCapture::new() {
+        Ok(p) => {
+            log::info!("using layer-shell input capture");
+            return Box::new(p);
+        }
+        Err(e) => log::info!("layer_shell input capture not available: {e}"),
+    }
+
+    #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
+    match x11::X11InputCapture::new() {
+        Ok(p) => {
+            log::info!("using x11 input capture");
+            return Box::new(p);
+        }
+        Err(e) => log::info!("x11 input capture not available: {e}"),
+    }
+
+    log::error!("falling back to dummy input capture");
+    Box::new(dummy::DummyInputCapture::new())
 }

 pub trait InputCapture: Stream<Item = io::Result<(ClientHandle, Event)>> + Unpin {
--- a/src/capture/error.rs
+++ b/src/capture/error.rs
@@ -1,142 +0,0 @@
-use std::fmt::Display;
-use thiserror::Error;
-
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-use std::io;
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-use wayland_client::{
-    backend::WaylandError,
-    globals::{BindError, GlobalError},
-    ConnectError, DispatchError,
-};
-
-#[derive(Debug, Error)]
-pub enum CaptureCreationError {
-    NoAvailableBackend,
-    #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-    Libei(#[from] LibeiCaptureCreationError),
-    #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-    LayerShell(#[from] LayerShellCaptureCreationError),
-    #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-    X11(#[from] X11InputCaptureCreationError),
-    #[cfg(target_os = "macos")]
-    Macos(#[from] MacOSInputCaptureCreationError),
-    #[cfg(windows)]
-    Windows,
-}
-
-impl Display for CaptureCreationError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        let reason = match self {
-            #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-            CaptureCreationError::Libei(reason) => {
-                format!("error creating portal backend: {reason}")
-            }
-            #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-            CaptureCreationError::LayerShell(reason) => {
-                format!("error creating layer-shell backend: {reason}")
-            }
-            #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-            CaptureCreationError::X11(e) => format!("{e}"),
-            #[cfg(target_os = "macos")]
-            CaptureCreationError::Macos(e) => format!("{e}"),
-            #[cfg(windows)]
-            CaptureCreationError::Windows => String::new(),
-            CaptureCreationError::NoAvailableBackend => "no available backend".to_string(),
-        };
-        write!(f, "could not create input capture: {reason}")
-    }
-}
-
-#[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-#[derive(Debug, Error)]
-pub enum LibeiCaptureCreationError {
-    Ashpd(#[from] ashpd::Error),
-}
-
-#[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-impl Display for LibeiCaptureCreationError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            LibeiCaptureCreationError::Ashpd(portal_error) => write!(f, "{portal_error}"),
-        }
-    }
-}
-
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-#[derive(Debug, Error)]
-pub struct WaylandBindError {
-    inner: BindError,
-    protocol: &'static str,
-}
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-impl WaylandBindError {
-    pub(crate) fn new(inner: BindError, protocol: &'static str) -> Self {
-        Self { inner, protocol }
-    }
-}
-
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-impl Display for WaylandBindError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(
-            f,
-            "{} protocol not supported: {}",
-            self.protocol, self.inner
-        )
-    }
-}
-
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-#[derive(Debug, Error)]
-pub enum LayerShellCaptureCreationError {
-    Connect(#[from] ConnectError),
-    Global(#[from] GlobalError),
-    Wayland(#[from] WaylandError),
-    Bind(#[from] WaylandBindError),
-    Dispatch(#[from] DispatchError),
-    Io(#[from] io::Error),
-}
-
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-impl Display for LayerShellCaptureCreationError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            LayerShellCaptureCreationError::Bind(e) => write!(f, "{e}"),
-            LayerShellCaptureCreationError::Connect(e) => {
-                write!(f, "could not connect to wayland compositor: {e}")
-            }
-            LayerShellCaptureCreationError::Global(e) => write!(f, "wayland error: {e}"),
-            LayerShellCaptureCreationError::Wayland(e) => write!(f, "wayland error: {e}"),
-            LayerShellCaptureCreationError::Dispatch(e) => {
-                write!(f, "error dispatching wayland events: {e}")
-            }
-            LayerShellCaptureCreationError::Io(e) => write!(f, "io error: {e}"),
-        }
-    }
-}
-
-#[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-#[derive(Debug, Error)]
-pub enum X11InputCaptureCreationError {
-    NotImplemented,
-}
-
-#[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-impl Display for X11InputCaptureCreationError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "X11 input capture is not yet implemented :(")
-    }
-}
-#[cfg(target_os = "macos")]
-#[derive(Debug, Error)]
-pub enum MacOSInputCaptureCreationError {
-    NotImplemented,
-}
-
-#[cfg(target_os = "macos")]
-impl Display for MacOSInputCaptureCreationError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "macos input capture is not yet implemented :(")
-    }
-}
--- a/src/capture/libei.rs
+++ b/src/capture/libei.rs
@@ -36,8 +36,6 @@ use crate::{
    event::{Event, KeyboardEvent, PointerEvent},
 };

-use super::error::LibeiCaptureCreationError;
-
 #[derive(Debug)]
 enum ProducerEvent {
    Release,
@@ -133,7 +131,7 @@ impl<'a> Drop for LibeiInputCapture<'a> {

 async fn create_session<'a>(
    input_capture: &'a InputCapture<'a>,
-) -> std::result::Result<(Session<'a>, BitFlags<Capabilities>), ashpd::Error> {
+) -> Result<(Session<'a>, BitFlags<Capabilities>)> {
    log::debug!("creating input capture session");
    let (session, capabilities) = loop {
        match input_capture
@@ -215,7 +213,7 @@ async fn wait_for_active_client(
 }

 impl<'a> LibeiInputCapture<'a> {
-    pub async fn new() -> std::result::Result<Self, LibeiCaptureCreationError> {
+    pub async fn new() -> Result<Self> {
        let input_capture = Box::pin(InputCapture::new().await?);
        let input_capture_ptr = input_capture.as_ref().get_ref() as *const InputCapture<'static>;
        let mut first_session = Some(create_session(unsafe { &*input_capture_ptr }).await?);
--- a/src/capture/macos.rs
+++ b/src/capture/macos.rs
@@ -1,7 +1,7 @@
-use crate::capture::error::MacOSInputCaptureCreationError;
 use crate::capture::InputCapture;
 use crate::client::{ClientEvent, ClientHandle};
 use crate::event::Event;
+use anyhow::{anyhow, Result};
 use futures_core::Stream;
 use std::task::{Context, Poll};
 use std::{io, pin::Pin};
@@ -9,8 +9,8 @@ use std::{io, pin::Pin};
 pub struct MacOSInputCapture;

 impl MacOSInputCapture {
-    pub fn new() -> std::result::Result<Self, MacOSInputCaptureCreationError> {
-        Err(MacOSInputCaptureCreationError::NotImplemented)
+    pub fn new() -> Result<Self> {
+        Err(anyhow!("not yet implemented"))
    }
 }

--- a/src/capture/wayland.rs
+++ b/src/capture/wayland.rs
@@ -1,8 +1,9 @@
 use crate::{
-    capture::{error::WaylandBindError, InputCapture},
+    capture::InputCapture,
    client::{ClientEvent, ClientHandle, Position},
 };

+use anyhow::{anyhow, Result};
 use futures_core::Stream;
 use memmap::MmapOptions;
 use std::{
@@ -67,8 +68,6 @@ use tempfile;

 use crate::event::{Event, KeyboardEvent, PointerEvent};

-use super::error::LayerShellCaptureCreationError;
-
 struct Globals {
    compositor: wl_compositor::WlCompositor,
    pointer_constraints: ZwpPointerConstraintsV1,
@@ -112,7 +111,6 @@ struct State {
    qh: QueueHandle<Self>,
    pending_events: VecDeque<(ClientHandle, Event)>,
    output_info: Vec<(WlOutput, OutputInfo)>,
-    scroll_discrete_pending: bool,
 }

 struct Inner {
@@ -259,37 +257,64 @@ fn draw(f: &mut File, (width, height): (u32, u32)) {
 }

 impl WaylandInputCapture {
-    pub fn new() -> std::result::Result<Self, LayerShellCaptureCreationError> {
-        let conn = Connection::connect_to_env()?;
-        let (g, mut queue) = registry_queue_init::<State>(&conn)?;
+    pub fn new() -> Result<Self> {
+        let conn = match Connection::connect_to_env() {
+            Ok(c) => c,
+            Err(e) => return Err(anyhow!("could not connect to wayland compositor: {e:?}")),
+        };
+
+        let (g, mut queue) = match registry_queue_init::<State>(&conn) {
+            Ok(q) => q,
+            Err(e) => return Err(anyhow!("failed to initialize wl_registry: {e:?}")),
+        };

        let qh = queue.handle();

-        let compositor: wl_compositor::WlCompositor = g
-            .bind(&qh, 4..=5, ())
-            .map_err(|e| WaylandBindError::new(e, "wl_compositor 4..=5"))?;
-        let xdg_output_manager: ZxdgOutputManagerV1 = g
-            .bind(&qh, 1..=3, ())
-            .map_err(|e| WaylandBindError::new(e, "xdg_output_manager 1..=3"))?;
-        let shm: wl_shm::WlShm = g
-            .bind(&qh, 1..=1, ())
-            .map_err(|e| WaylandBindError::new(e, "wl_shm"))?;
-        let layer_shell: ZwlrLayerShellV1 = g
-            .bind(&qh, 3..=4, ())
-            .map_err(|e| WaylandBindError::new(e, "wlr_layer_shell 3..=4"))?;
-        let seat: wl_seat::WlSeat = g
-            .bind(&qh, 7..=8, ())
-            .map_err(|e| WaylandBindError::new(e, "wl_seat 7..=8"))?;
+        let compositor: wl_compositor::WlCompositor = match g.bind(&qh, 4..=5, ()) {
+            Ok(compositor) => compositor,
+            Err(_) => return Err(anyhow!("wl_compositor >= v4 not supported")),
+        };
+
+        let xdg_output_manager: ZxdgOutputManagerV1 = match g.bind(&qh, 1..=3, ()) {
+            Ok(xdg_output_manager) => xdg_output_manager,
+            Err(_) => return Err(anyhow!("xdg_output not supported!")),
+        };
+
+        let shm: wl_shm::WlShm = match g.bind(&qh, 1..=1, ()) {
+            Ok(wl_shm) => wl_shm,
+            Err(_) => return Err(anyhow!("wl_shm v1 not supported")),
+        };
+
+        let layer_shell: ZwlrLayerShellV1 = match g.bind(&qh, 3..=4, ()) {
+            Ok(layer_shell) => layer_shell,
+            Err(_) => return Err(anyhow!("zwlr_layer_shell_v1 >= v3 not supported - required to display a surface at the edge of the screen")),
+        };
+
+        let seat: wl_seat::WlSeat = match g.bind(&qh, 7..=8, ()) {
+            Ok(wl_seat) => wl_seat,
+            Err(_) => return Err(anyhow!("wl_seat >= v7 not supported")),
+        };
+
+        let pointer_constraints: ZwpPointerConstraintsV1 = match g.bind(&qh, 1..=1, ()) {
+            Ok(pointer_constraints) => pointer_constraints,
+            Err(_) => return Err(anyhow!("zwp_pointer_constraints_v1 not supported")),
+        };
+
+        let relative_pointer_manager: ZwpRelativePointerManagerV1 = match g.bind(&qh, 1..=1, ()) {
+            Ok(relative_pointer_manager) => relative_pointer_manager,
+            Err(_) => return Err(anyhow!("zwp_relative_pointer_manager_v1 not supported")),
+        };
+
+        let shortcut_inhibit_manager: ZwpKeyboardShortcutsInhibitManagerV1 =
+            match g.bind(&qh, 1..=1, ()) {
+                Ok(shortcut_inhibit_manager) => shortcut_inhibit_manager,
+                Err(_) => {
+                    return Err(anyhow!(
+                        "zwp_keyboard_shortcuts_inhibit_manager_v1 not supported"
+                    ))
+                }
+            };

-        let pointer_constraints: ZwpPointerConstraintsV1 = g
-            .bind(&qh, 1..=1, ())
-            .map_err(|e| WaylandBindError::new(e, "zwp_pointer_constraints_v1"))?;
-        let relative_pointer_manager: ZwpRelativePointerManagerV1 = g
-            .bind(&qh, 1..=1, ())
-            .map_err(|e| WaylandBindError::new(e, "zwp_relative_pointer_manager_v1"))?;
-        let shortcut_inhibit_manager: ZwpKeyboardShortcutsInhibitManagerV1 = g
-            .bind(&qh, 1..=1, ())
-            .map_err(|e| WaylandBindError::new(e, "zwp_keyboard_shortcuts_inhibit_manager_v1"))?;
        let outputs = vec![];

        let g = Globals {
@@ -326,7 +351,6 @@ impl WaylandInputCapture {
            read_guard: None,
            pending_events: VecDeque::new(),
            output_info: vec![],
-            scroll_discrete_pending: false,
        };

        // dispatch registry to () again, in order to read all wl_outputs
@@ -728,25 +752,17 @@ impl Dispatch<WlPointer, ()> for State {
            }
            wl_pointer::Event::Axis { time, axis, value } => {
                let (_, client) = app.focused.as_ref().unwrap();
-                if app.scroll_discrete_pending {
-                    // each axisvalue120 event is coupled with
-                    // a corresponding axis event, which needs to
-                    // be ignored to not duplicate the scrolling
-                    app.scroll_discrete_pending = false;
-                } else {
-                    app.pending_events.push_back((
-                        *client,
-                        Event::Pointer(PointerEvent::Axis {
-                            time,
-                            axis: u32::from(axis) as u8,
-                            value,
-                        }),
-                    ));
-                }
+                app.pending_events.push_back((
+                    *client,
+                    Event::Pointer(PointerEvent::Axis {
+                        time,
+                        axis: u32::from(axis) as u8,
+                        value,
+                    }),
+                ));
            }
            wl_pointer::Event::AxisValue120 { axis, value120 } => {
                let (_, client) = app.focused.as_ref().unwrap();
-                app.scroll_discrete_pending = true;
                app.pending_events.push_back((
                    *client,
                    Event::Pointer(PointerEvent::AxisDiscrete120 {
--- a/src/capture/windows.rs
+++ b/src/capture/windows.rs
@@ -96,7 +96,8 @@ unsafe fn get_event_tid() -> Option<u32> {
 static mut ENTRY_POINT: (i32, i32) = (0, 0);

 fn to_mouse_event(wparam: WPARAM, lparam: LPARAM) -> Option<PointerEvent> {
-    let mouse_low_level: MSLLHOOKSTRUCT = unsafe { *(lparam.0 as *const MSLLHOOKSTRUCT) };
+    let mouse_low_level: MSLLHOOKSTRUCT =
+        unsafe { *std::mem::transmute::<LPARAM, *const MSLLHOOKSTRUCT>(lparam) };
    match wparam {
        WPARAM(p) if p == WM_LBUTTONDOWN as usize => Some(PointerEvent::Button {
            time: 0,
@@ -140,7 +141,7 @@ fn to_mouse_event(wparam: WPARAM, lparam: LPARAM) -> Option<PointerEvent> {
        },
        WPARAM(p) if p == WM_MOUSEWHEEL as usize => Some(PointerEvent::AxisDiscrete120 {
            axis: 0,
-            value: -(mouse_low_level.mouseData as i32 >> 16),
+            value: -(mouse_low_level.mouseData as i32),
        }),
        WPARAM(p) if p == WM_XBUTTONDOWN as usize || p == WM_XBUTTONUP as usize => {
            let hb = mouse_low_level.mouseData >> 16;
@@ -166,7 +167,8 @@ fn to_mouse_event(wparam: WPARAM, lparam: LPARAM) -> Option<PointerEvent> {
 }

 unsafe fn to_key_event(wparam: WPARAM, lparam: LPARAM) -> Option<KeyboardEvent> {
-    let kybrdllhookstruct: KBDLLHOOKSTRUCT = *(lparam.0 as *const KBDLLHOOKSTRUCT);
+    let kybrdllhookstruct: KBDLLHOOKSTRUCT =
+        *std::mem::transmute::<LPARAM, *const KBDLLHOOKSTRUCT>(lparam);
    let mut scan_code = kybrdllhookstruct.scanCode;
    log::trace!("scan_code: {scan_code}");
    if kybrdllhookstruct.flags.contains(LLKHF_EXTENDED) {
@@ -245,7 +247,8 @@ unsafe fn check_client_activation(wparam: WPARAM, lparam: LPARAM) -> bool {
    if wparam.0 != WM_MOUSEMOVE as usize {
        return ACTIVE_CLIENT.is_some();
    }
-    let mouse_low_level: MSLLHOOKSTRUCT = *(lparam.0 as *const MSLLHOOKSTRUCT);
+    let mouse_low_level: MSLLHOOKSTRUCT =
+        unsafe { *std::mem::transmute::<LPARAM, *const MSLLHOOKSTRUCT>(lparam) };
    static mut PREV_POS: Option<(i32, i32)> = None;
    let curr_pos = (mouse_low_level.pt.x, mouse_low_level.pt.y);
    let prev_pos = PREV_POS.unwrap_or(curr_pos);
@@ -575,7 +578,7 @@ fn update_clients(client_event: ClientEvent) {
 }

 impl WindowsInputCapture {
-    pub(crate) fn new() -> Self {
+    pub(crate) fn new() -> Result<Self> {
        unsafe {
            let (tx, rx) = channel(10);
            EVENT_TX.replace(tx);
@@ -583,10 +586,10 @@ impl WindowsInputCapture {
            let msg_thread = Some(thread::spawn(|| message_thread(ready_tx)));
            /* wait for thread to set its id */
            ready_rx.recv().expect("channel closed");
-            Self {
+            Ok(Self {
                msg_thread,
                event_rx: rx,
-            }
+            })
        }
    }
 }
--- a/src/capture/x11.rs
+++ b/src/capture/x11.rs
@@ -1,3 +1,4 @@
+use anyhow::{anyhow, Result};
 use std::io;
 use std::task::Poll;

@@ -8,13 +9,11 @@ use crate::event::Event;

 use crate::client::{ClientEvent, ClientHandle};

-use super::error::X11InputCaptureCreationError;
-
 pub struct X11InputCapture {}

 impl X11InputCapture {
-    pub fn new() -> std::result::Result<Self, X11InputCaptureCreationError> {
-        Err(X11InputCaptureCreationError::NotImplemented)
+    pub fn new() -> Result<Self> {
+        Err(anyhow!("not implemented"))
    }
 }

--- a/src/capture_test.rs
+++ b/src/capture_test.rs
@@ -1,6 +1,5 @@
 use crate::capture;
 use crate::client::{ClientEvent, Position};
-use crate::config::Config;
 use crate::event::{Event, KeyboardEvent};
 use anyhow::{anyhow, Result};
 use futures::StreamExt;
@@ -13,14 +12,12 @@ pub fn run() -> Result<()> {
        .enable_time()
        .build()?;

-    let config = Config::new()?;
-
-    runtime.block_on(LocalSet::new().run_until(input_capture_test(config)))
+    runtime.block_on(LocalSet::new().run_until(input_capture_test()))
 }

-async fn input_capture_test(config: Config) -> Result<()> {
+async fn input_capture_test() -> Result<()> {
    log::info!("creating input capture");
-    let mut input_capture = capture::create(config.capture_backend).await?;
+    let mut input_capture = capture::create().await;
    log::info!("creating clients");
    input_capture.notify(ClientEvent::Create(0, Position::Left))?;
    input_capture.notify(ClientEvent::Create(1, Position::Right))?;
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,9 +1,8 @@
 use anyhow::Result;
-use clap::{Parser, ValueEnum};
+use clap::Parser;
 use serde::{Deserialize, Serialize};
 use std::collections::HashSet;
 use std::env;
-use std::fmt::Display;
 use std::net::IpAddr;
 use std::{error::Error, fs};
 use toml;
@@ -16,10 +15,8 @@ pub const DEFAULT_PORT: u16 = 4242;

 #[derive(Serialize, Deserialize, Debug)]
 pub struct ConfigToml {
-    pub capture_backend: Option<CaptureBackend>,
-    pub emulation_backend: Option<EmulationBackend>,
    pub port: Option<u16>,
-    pub frontend: Option<Frontend>,
+    pub frontend: Option<String>,
    pub release_bind: Option<Vec<scancode::Linux>>,
    pub left: Option<TomlClient>,
    pub right: Option<TomlClient>,
@@ -29,7 +26,6 @@ pub struct ConfigToml {

 #[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
 pub struct TomlClient {
-    pub capture_backend: Option<CaptureBackend>,
    pub hostname: Option<String>,
    pub host_name: Option<String>,
    pub ips: Option<Vec<IpAddr>>,
@@ -55,7 +51,7 @@ struct CliArgs {

    /// the frontend to use [cli | gtk]
    #[arg(short, long)]
-    frontend: Option<Frontend>,
+    frontend: Option<String>,

    /// non-default config file location
    #[arg(short, long)]
@@ -72,106 +68,16 @@ struct CliArgs {
    /// test input emulation
    #[arg(long)]
    test_emulation: bool,
-
-    /// capture backend override
-    #[arg(long)]
-    capture_backend: Option<CaptureBackend>,
-
-    /// emulation backend override
-    #[arg(long)]
-    emulation_backend: Option<EmulationBackend>,
 }

-#[derive(Clone, Copy, Debug, Deserialize, Eq, PartialEq, Serialize, ValueEnum)]
-pub enum CaptureBackend {
-    #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-    InputCapturePortal,
-    #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-    LayerShell,
-    #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-    X11,
-    #[cfg(windows)]
-    Windows,
-    #[cfg(target_os = "macos")]
-    MacOs,
-    Dummy,
-}
-
-impl Display for CaptureBackend {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-            CaptureBackend::InputCapturePortal => write!(f, "input-capture-portal"),
-            #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-            CaptureBackend::LayerShell => write!(f, "layer-shell"),
-            #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-            CaptureBackend::X11 => write!(f, "X11"),
-            #[cfg(windows)]
-            CaptureBackend::Windows => write!(f, "windows"),
-            #[cfg(target_os = "macos")]
-            CaptureBackend::MacOs => write!(f, "MacOS"),
-            CaptureBackend::Dummy => write!(f, "dummy"),
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Deserialize, Eq, PartialEq, Serialize, ValueEnum)]
-pub enum EmulationBackend {
-    #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-    Wlroots,
-    #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-    Libei,
-    #[cfg(all(unix, feature = "xdg_desktop_portal", not(target_os = "macos")))]
-    Xdp,
-    #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-    X11,
-    #[cfg(windows)]
-    Windows,
-    #[cfg(target_os = "macos")]
-    MacOs,
-    Dummy,
-}
-
-impl Display for EmulationBackend {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-            EmulationBackend::Wlroots => write!(f, "wlroots"),
-            #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-            EmulationBackend::Libei => write!(f, "libei"),
-            #[cfg(all(unix, feature = "xdg_desktop_portal", not(target_os = "macos")))]
-            EmulationBackend::Xdp => write!(f, "xdg-desktop-portal"),
-            #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-            EmulationBackend::X11 => write!(f, "X11"),
-            #[cfg(windows)]
-            EmulationBackend::Windows => write!(f, "windows"),
-            #[cfg(target_os = "macos")]
-            EmulationBackend::MacOs => write!(f, "macos"),
-            EmulationBackend::Dummy => write!(f, "dummy"),
-        }
-    }
-}
-
-#[derive(Clone, Copy, Debug, Deserialize, PartialEq, Eq, Serialize, ValueEnum)]
+#[derive(Debug, PartialEq, Eq)]
 pub enum Frontend {
    Gtk,
    Cli,
 }

-impl Default for Frontend {
-    fn default() -> Self {
-        if cfg!(feature = "gtk") {
-            Self::Gtk
-        } else {
-            Self::Cli
-        }
-    }
-}
-
 #[derive(Debug)]
 pub struct Config {
-    pub capture_backend: Option<CaptureBackend>,
-    pub emulation_backend: Option<EmulationBackend>,
    pub frontend: Frontend,
    pub port: u16,
    pub clients: Vec<(TomlClient, Position)>,
@@ -223,14 +129,33 @@ impl Config {
            Ok(c) => Some(c),
        };

-        let frontend_arg = args.frontend;
-        let frontend_cfg = config_toml.as_ref().and_then(|c| c.frontend);
-        let frontend = frontend_arg.or(frontend_cfg).unwrap_or_default();
+        let frontend = match args.frontend {
+            None => match &config_toml {
+                Some(c) => c.frontend.clone(),
+                None => None,
+            },
+            frontend => frontend,
+        };

-        let port = args
-            .port
-            .or(config_toml.as_ref().and_then(|c| c.port))
-            .unwrap_or(DEFAULT_PORT);
+        let frontend = match frontend {
+            #[cfg(feature = "gtk")]
+            None => Frontend::Gtk,
+            #[cfg(not(feature = "gtk"))]
+            None => Frontend::Cli,
+            Some(s) => match s.as_str() {
+                "cli" => Frontend::Cli,
+                "gtk" => Frontend::Gtk,
+                _ => Frontend::Cli,
+            },
+        };
+
+        let port = match args.port {
+            Some(port) => port,
+            None => match &config_toml {
+                Some(c) => c.port.unwrap_or(DEFAULT_PORT),
+                None => DEFAULT_PORT,
+            },
+        };

        log::debug!("{config_toml:?}");
        let release_bind = config_toml
@@ -238,14 +163,6 @@ impl Config {
            .and_then(|c| c.release_bind.clone())
            .unwrap_or(Vec::from_iter(DEFAULT_RELEASE_KEYS.iter().cloned()));

-        let capture_backend = args
-            .capture_backend
-            .or(config_toml.as_ref().and_then(|c| c.capture_backend));
-
-        let emulation_backend = args
-            .emulation_backend
-            .or(config_toml.as_ref().and_then(|c| c.emulation_backend));
-
        let mut clients: Vec<(TomlClient, Position)> = vec![];

        if let Some(config_toml) = config_toml {
@@ -268,8 +185,6 @@ impl Config {
        let test_emulation = args.test_emulation;

        Ok(Config {
-            capture_backend,
-            emulation_backend,
            daemon,
            frontend,
            clients,
--- a/src/emulate.rs
+++ b/src/emulate.rs
@@ -3,13 +3,10 @@ use std::future;

 use crate::{
    client::{ClientEvent, ClientHandle},
-    config::EmulationBackend,
    event::Event,
 };
 use anyhow::Result;

-use self::error::EmulationCreationError;
-
 #[cfg(windows)]
 pub mod windows;

@@ -30,7 +27,6 @@ pub mod macos;

 /// fallback input emulation (logs events)
 pub mod dummy;
-pub mod error;

 #[async_trait]
 pub trait InputEmulation: Send {
@@ -45,60 +41,58 @@ pub trait InputEmulation: Send {
    async fn destroy(&mut self);
 }

-pub async fn create_backend(
-    backend: EmulationBackend,
-) -> Result<Box<dyn InputEmulation>, EmulationCreationError> {
-    match backend {
-        #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-        EmulationBackend::Wlroots => Ok(Box::new(wlroots::WlrootsEmulation::new()?)),
-        #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-        EmulationBackend::Libei => Ok(Box::new(libei::LibeiEmulation::new().await?)),
-        #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-        EmulationBackend::X11 => Ok(Box::new(x11::X11Emulation::new()?)),
-        #[cfg(all(unix, feature = "xdg_desktop_portal", not(target_os = "macos")))]
-        EmulationBackend::Xdp => Ok(Box::new(
-            xdg_desktop_portal::DesktopPortalEmulation::new().await?,
-        )),
-        #[cfg(windows)]
-        EmulationBackend::Windows => Ok(Box::new(windows::WindowsEmulation::new()?)),
-        #[cfg(target_os = "macos")]
-        EmulationBackend::MacOs => Ok(Box::new(macos::MacOSEmulation::new()?)),
-        EmulationBackend::Dummy => Ok(Box::new(dummy::DummyEmulation::new())),
+pub async fn create() -> Box<dyn InputEmulation> {
+    #[cfg(windows)]
+    match windows::WindowsEmulation::new() {
+        Ok(c) => return Box::new(c),
+        Err(e) => log::warn!("windows input emulation unavailable: {e}"),
    }
-}

-pub async fn create(
-    backend: Option<EmulationBackend>,
-) -> Result<Box<dyn InputEmulation>, EmulationCreationError> {
-    if let Some(backend) = backend {
-        let b = create_backend(backend).await;
-        if b.is_ok() {
-            log::info!("using emulation backend: {backend}");
+    #[cfg(target_os = "macos")]
+    match macos::MacOSEmulation::new() {
+        Ok(c) => {
+            log::info!("using macos input emulation");
+            return Box::new(c);
        }
-        return b;
+        Err(e) => log::error!("macos input emulatino not available: {e}"),
    }

-    for backend in [
-        #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-        EmulationBackend::Wlroots,
-        #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-        EmulationBackend::Libei,
-        #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-        EmulationBackend::X11,
-        #[cfg(windows)]
-        EmulationBackend::Windows,
-        #[cfg(target_os = "macos")]
-        EmulationBackend::MacOs,
-        EmulationBackend::Dummy,
-    ] {
-        match create_backend(backend).await {
-            Ok(b) => {
-                log::info!("using emulation backend: {backend}");
-                return Ok(b);
-            }
-            Err(e) => log::warn!("{e}"),
+    #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
+    match wlroots::WlrootsEmulation::new() {
+        Ok(c) => {
+            log::info!("using wlroots input emulation");
+            return Box::new(c);
        }
+        Err(e) => log::info!("wayland backend not available: {e}"),
    }

-    Err(EmulationCreationError::NoAvailableBackend)
+    #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
+    match libei::LibeiEmulation::new().await {
+        Ok(c) => {
+            log::info!("using libei input emulation");
+            return Box::new(c);
+        }
+        Err(e) => log::info!("libei not available: {e}"),
+    }
+
+    #[cfg(all(unix, feature = "xdg_desktop_portal", not(target_os = "macos")))]
+    match xdg_desktop_portal::DesktopPortalEmulation::new().await {
+        Ok(c) => {
+            log::info!("using xdg-remote-desktop-portal input emulation");
+            return Box::new(c);
+        }
+        Err(e) => log::info!("remote desktop portal not available: {e}"),
+    }
+
+    #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
+    match x11::X11Emulation::new() {
+        Ok(c) => {
+            log::info!("using x11 input emulation");
+            return Box::new(c);
+        }
+        Err(e) => log::info!("x11 input emulation not available: {e}"),
+    }
+
+    log::error!("falling back to dummy input emulation");
+    Box::new(dummy::DummyEmulation::new())
 }
--- a/src/emulate/error.rs
+++ b/src/emulate/error.rs
@@ -1,168 +0,0 @@
-use std::fmt::Display;
-
-use thiserror::Error;
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-use wayland_client::{
-    backend::WaylandError,
-    globals::{BindError, GlobalError},
-    ConnectError, DispatchError,
-};
-
-#[derive(Debug, Error)]
-pub enum EmulationCreationError {
-    #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-    Wlroots(#[from] WlrootsEmulationCreationError),
-    #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-    Libei(#[from] LibeiEmulationCreationError),
-    #[cfg(all(unix, feature = "xdg_desktop_portal", not(target_os = "macos")))]
-    Xdp(#[from] XdpEmulationCreationError),
-    #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-    X11(#[from] X11EmulationCreationError),
-    #[cfg(target_os = "macos")]
-    MacOs(#[from] MacOSEmulationCreationError),
-    #[cfg(windows)]
-    Windows(#[from] WindowsEmulationCreationError),
-    NoAvailableBackend,
-}
-
-impl Display for EmulationCreationError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        let reason = match self {
-            #[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-            EmulationCreationError::Wlroots(e) => format!("wlroots backend: {e}"),
-            #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-            EmulationCreationError::Libei(e) => format!("libei backend: {e}"),
-            #[cfg(all(unix, feature = "xdg_desktop_portal", not(target_os = "macos")))]
-            EmulationCreationError::Xdp(e) => format!("desktop portal backend: {e}"),
-            #[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-            EmulationCreationError::X11(e) => format!("x11 backend: {e}"),
-            #[cfg(target_os = "macos")]
-            EmulationCreationError::MacOs(e) => format!("macos backend: {e}"),
-            #[cfg(windows)]
-            EmulationCreationError::Windows(e) => format!("windows backend: {e}"),
-            EmulationCreationError::NoAvailableBackend => "no backend available".to_string(),
-        };
-        write!(f, "could not create input emulation backend: {reason}")
-    }
-}
-
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-#[derive(Debug, Error)]
-pub enum WlrootsEmulationCreationError {
-    Connect(#[from] ConnectError),
-    Global(#[from] GlobalError),
-    Wayland(#[from] WaylandError),
-    Bind(#[from] WaylandBindError),
-    Dispatch(#[from] DispatchError),
-    Io(#[from] std::io::Error),
-}
-
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-#[derive(Debug, Error)]
-pub struct WaylandBindError {
-    inner: BindError,
-    protocol: &'static str,
-}
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-impl WaylandBindError {
-    pub(crate) fn new(inner: BindError, protocol: &'static str) -> Self {
-        Self { inner, protocol }
-    }
-}
-
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-impl Display for WaylandBindError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(
-            f,
-            "{} protocol not supported: {}",
-            self.protocol, self.inner
-        )
-    }
-}
-
-#[cfg(all(unix, feature = "wayland", not(target_os = "macos")))]
-impl Display for WlrootsEmulationCreationError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            WlrootsEmulationCreationError::Bind(e) => write!(f, "{e}"),
-            WlrootsEmulationCreationError::Connect(e) => {
-                write!(f, "could not connect to wayland compositor: {e}")
-            }
-            WlrootsEmulationCreationError::Global(e) => write!(f, "wayland error: {e}"),
-            WlrootsEmulationCreationError::Wayland(e) => write!(f, "wayland error: {e}"),
-            WlrootsEmulationCreationError::Dispatch(e) => {
-                write!(f, "error dispatching wayland events: {e}")
-            }
-            WlrootsEmulationCreationError::Io(e) => write!(f, "io error: {e}"),
-        }
-    }
-}
-
-#[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-#[derive(Debug, Error)]
-pub enum LibeiEmulationCreationError {
-    Ashpd(#[from] ashpd::Error),
-    Io(#[from] std::io::Error),
-}
-
-#[cfg(all(unix, feature = "libei", not(target_os = "macos")))]
-impl Display for LibeiEmulationCreationError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            LibeiEmulationCreationError::Ashpd(e) => write!(f, "xdg-desktop-portal: {e}"),
-            LibeiEmulationCreationError::Io(e) => write!(f, "io error: {e}"),
-        }
-    }
-}
-
-#[cfg(all(unix, feature = "xdg_desktop_portal", not(target_os = "macos")))]
-#[derive(Debug, Error)]
-pub enum XdpEmulationCreationError {
-    Ashpd(#[from] ashpd::Error),
-}
-
-#[cfg(all(unix, feature = "xdg_desktop_portal", not(target_os = "macos")))]
-impl Display for XdpEmulationCreationError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            XdpEmulationCreationError::Ashpd(e) => write!(f, "portal error: {e}"),
-        }
-    }
-}
-
-#[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-#[derive(Debug, Error)]
-pub enum X11EmulationCreationError {
-    OpenDisplay,
-}
-
-#[cfg(all(unix, feature = "x11", not(target_os = "macos")))]
-impl Display for X11EmulationCreationError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            X11EmulationCreationError::OpenDisplay => write!(f, "could not open display!"),
-        }
-    }
-}
-
-#[cfg(target_os = "macos")]
-#[derive(Debug, Error)]
-pub enum MacOSEmulationCreationError {
-    EventSourceCreation,
-}
-
-#[cfg(target_os = "macos")]
-impl Display for MacOSEmulationCreationError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            MacOSEmulationCreationError::EventSourceCreation => {
-                write!(f, "could not create event source")
-            }
-        }
-    }
-}
-
-#[cfg(windows)]
-#[derive(Debug, Error)]
-pub enum WindowsEmulationCreationError {}
--- a/src/emulate/libei.rs
+++ b/src/emulate/libei.rs
@@ -1,11 +1,10 @@
-use anyhow::{anyhow, Result};
 use std::{
    collections::HashMap,
-    io,
    os::{fd::OwnedFd, unix::net::UnixStream},
    time::{SystemTime, UNIX_EPOCH},
 };

+use anyhow::{anyhow, Result};
 use ashpd::{
    desktop::{
        remote_desktop::{DeviceType, RemoteDesktop},
@@ -28,8 +27,6 @@ use crate::{
    event::Event,
 };

-use super::error::LibeiEmulationCreationError;
-
 pub struct LibeiEmulation {
    handshake: bool,
    context: ei::Context,
@@ -80,14 +77,14 @@ async fn get_ei_fd() -> Result<OwnedFd, ashpd::Error> {
 }

 impl LibeiEmulation {
-    pub async fn new() -> Result<Self, LibeiEmulationCreationError> {
+    pub async fn new() -> Result<Self> {
        // fd is owned by the message, so we need to dup it
        let eifd = get_ei_fd().await?;
        let stream = UnixStream::from(eifd);
        // let stream = UnixStream::connect("/run/user/1000/eis-0")?;
        stream.set_nonblocking(true)?;
        let context = ei::Context::new(stream)?;
-        context.flush().map_err(|e| io::Error::new(e.kind(), e))?;
+        context.flush()?;
        let events = EiEventStream::new(context.clone())?;
        Ok(Self {
            handshake: false,
--- a/src/emulate/macos.rs
+++ b/src/emulate/macos.rs
@@ -1,6 +1,7 @@
 use crate::client::{ClientEvent, ClientHandle};
 use crate::emulate::InputEmulation;
 use crate::event::{Event, KeyboardEvent, PointerEvent};
+use anyhow::{anyhow, Result};
 use async_trait::async_trait;
 use core_graphics::display::{CGDisplayBounds, CGMainDisplayID, CGPoint};
 use core_graphics::event::{
@@ -12,8 +13,6 @@ use std::ops::{Index, IndexMut};
 use std::time::Duration;
 use tokio::task::AbortHandle;

-use super::error::MacOSEmulationCreationError;
-
 const DEFAULT_REPEAT_DELAY: Duration = Duration::from_millis(500);
 const DEFAULT_REPEAT_INTERVAL: Duration = Duration::from_millis(32);

@@ -54,9 +53,11 @@ impl IndexMut<CGMouseButton> for ButtonState {
 unsafe impl Send for MacOSEmulation {}

 impl MacOSEmulation {
-    pub fn new() -> Result<Self, MacOSEmulationCreationError> {
-        let event_source = CGEventSource::new(CGEventSourceStateID::CombinedSessionState)
-            .map_err(|_| MacOSEmulationCreationError::EventSourceCreation)?;
+    pub fn new() -> Result<Self> {
+        let event_source = match CGEventSource::new(CGEventSourceStateID::CombinedSessionState) {
+            Ok(e) => e,
+            Err(_) => return Err(anyhow!("event source creation failed!")),
+        };
        let button_state = ButtonState {
            left: false,
            right: false,
--- a/src/emulate/windows.rs
+++ b/src/emulate/windows.rs
@@ -1,9 +1,9 @@
-use super::error::WindowsEmulationCreationError;
 use crate::{
    emulate::InputEmulation,
    event::{KeyboardEvent, PointerEvent},
    scancode,
 };
+use anyhow::Result;
 use async_trait::async_trait;
 use std::ops::BitOrAssign;
 use std::time::Duration;
@@ -33,7 +33,7 @@ pub struct WindowsEmulation {
 }

 impl WindowsEmulation {
-    pub fn new() -> Result<Self, WindowsEmulationCreationError> {
+    pub fn new() -> Result<Self> {
        Ok(Self { repeat_task: None })
    }
 }
--- a/src/emulate/wlroots.rs
+++ b/src/emulate/wlroots.rs
@@ -1,5 +1,5 @@
 use crate::client::{ClientEvent, ClientHandle};
-use crate::emulate::{error::WlrootsEmulationCreationError, InputEmulation};
+use crate::emulate::InputEmulation;
 use async_trait::async_trait;
 use std::collections::HashMap;
 use std::io;
@@ -7,6 +7,7 @@ use std::os::fd::{AsFd, OwnedFd};
 use wayland_client::backend::WaylandError;
 use wayland_client::WEnum;

+use anyhow::{anyhow, Result};
 use wayland_client::protocol::wl_keyboard::{self, WlKeyboard};
 use wayland_client::protocol::wl_pointer::{Axis, ButtonState};
 use wayland_client::protocol::wl_seat::WlSeat;
@@ -29,8 +30,6 @@ use wayland_client::{

 use crate::event::{Event, KeyboardEvent, PointerEvent};

-use super::error::WaylandBindError;
-
 struct State {
    keymap: Option<(u32, OwnedFd, u32)>,
    input_for_client: HashMap<ClientHandle, VirtualInput>,
@@ -48,21 +47,18 @@ pub(crate) struct WlrootsEmulation {
 }

 impl WlrootsEmulation {
-    pub fn new() -> Result<Self, WlrootsEmulationCreationError> {
+    pub fn new() -> Result<Self> {
        let conn = Connection::connect_to_env()?;
        let (globals, queue) = registry_queue_init::<State>(&conn)?;
        let qh = queue.handle();

-        let seat: wl_seat::WlSeat = globals
-            .bind(&qh, 7..=8, ())
-            .map_err(|e| WaylandBindError::new(e, "wl_seat 7..=8"))?;
+        let seat: wl_seat::WlSeat = match globals.bind(&qh, 7..=8, ()) {
+            Ok(wl_seat) => wl_seat,
+            Err(_) => return Err(anyhow!("wl_seat >= v7 not supported")),
+        };

-        let vpm: VpManager = globals
-            .bind(&qh, 1..=1, ())
-            .map_err(|e| WaylandBindError::new(e, "wlr-virtual-pointer-unstable-v1"))?;
-        let vkm: VkManager = globals
-            .bind(&qh, 1..=1, ())
-            .map_err(|e| WaylandBindError::new(e, "virtual-keyboard-unstable-v1"))?;
+        let vpm: VpManager = globals.bind(&qh, 1..=1, ())?;
+        let vkm: VkManager = globals.bind(&qh, 1..=1, ())?;

        let input_for_client: HashMap<ClientHandle, VirtualInput> = HashMap::new();

@@ -79,7 +75,7 @@ impl WlrootsEmulation {
            queue,
        };
        while emulate.state.keymap.is_none() {
-            emulate.queue.blocking_dispatch(&mut emulate.state)?;
+            emulate.queue.blocking_dispatch(&mut emulate.state).unwrap();
        }
        // let fd = unsafe { &File::from_raw_fd(emulate.state.keymap.unwrap().1.as_raw_fd()) };
        // let mmap = unsafe { MmapOptions::new().map_copy(fd).unwrap() };
@@ -186,8 +182,7 @@ impl VirtualInput {
                    }
                    PointerEvent::AxisDiscrete120 { axis, value } => {
                        let axis: Axis = (axis as u32).try_into()?;
-                        self.pointer
-                            .axis_discrete(0, axis, value as f64 / 6., value / 120);
+                        self.pointer.axis(0, axis, (value / 15) as f64);
                        self.pointer.frame();
                    }
                    PointerEvent::Frame {} => self.pointer.frame(),
--- a/src/emulate/x11.rs
+++ b/src/emulate/x11.rs
@@ -1,3 +1,4 @@
+use anyhow::{anyhow, Result};
 use async_trait::async_trait;
 use std::ptr;
 use x11::{
@@ -13,8 +14,6 @@ use crate::{
    },
 };

-use super::error::X11EmulationCreationError;
-
 pub struct X11Emulation {
    display: *mut xlib::Display,
 }
@@ -22,11 +21,11 @@ pub struct X11Emulation {
 unsafe impl Send for X11Emulation {}

 impl X11Emulation {
-    pub fn new() -> Result<Self, X11EmulationCreationError> {
+    pub fn new() -> Result<Self> {
        let display = unsafe {
            match xlib::XOpenDisplay(ptr::null()) {
                d if d == ptr::null::<xlib::Display>() as *mut xlib::Display => {
-                    Err(X11EmulationCreationError::OpenDisplay)
+                    Err(anyhow!("could not open display"))
                }
                display => Ok(display),
            }
--- a/src/emulate/xdg_desktop_portal.rs
+++ b/src/emulate/xdg_desktop_portal.rs
@@ -17,15 +17,13 @@ use crate::{
    },
 };

-use super::error::XdpEmulationCreationError;
-
 pub struct DesktopPortalEmulation<'a> {
    proxy: RemoteDesktop<'a>,
    session: Session<'a>,
 }

 impl<'a> DesktopPortalEmulation<'a> {
-    pub async fn new() -> Result<DesktopPortalEmulation<'a>, XdpEmulationCreationError> {
+    pub async fn new() -> Result<DesktopPortalEmulation<'a>> {
        log::debug!("connecting to org.freedesktop.portal.RemoteDesktop portal ...");
        let proxy = RemoteDesktop::new().await?;

--- a/src/emulation_test.rs
+++ b/src/emulation_test.rs
@@ -1,5 +1,4 @@
 use crate::client::{ClientEvent, Position};
-use crate::config::Config;
 use crate::emulate;
 use crate::event::{Event, PointerEvent};
 use anyhow::Result;
@@ -14,16 +13,14 @@ pub fn run() -> Result<()> {
        .enable_time()
        .build()?;

-    let config = Config::new()?;
-
-    runtime.block_on(LocalSet::new().run_until(input_emulation_test(config)))
+    runtime.block_on(LocalSet::new().run_until(input_emulation_test()))
 }

 const FREQUENCY_HZ: f64 = 1.0;
 const RADIUS: f64 = 100.0;

-async fn input_emulation_test(config: Config) -> Result<()> {
-    let mut emulation = emulate::create(config.emulation_backend).await?;
+async fn input_emulation_test() -> Result<()> {
+    let mut emulation = emulate::create().await;
    emulation
        .notify(ClientEvent::Create(0, Position::Left))
        .await;
--- a/src/frontend/gtk.rs
+++ b/src/frontend/gtk.rs
@@ -11,7 +11,6 @@ use std::{
 use crate::frontend::{gtk::window::Window, FrontendRequest};

 use adw::Application;
-use endi::{Endian, ReadBytes};
 use gtk::{
    gdk::Display, glib::clone, prelude::*, subclass::prelude::ObjectSubclassIsExt, IconTheme,
 };
@@ -86,14 +85,16 @@ fn build_ui(app: &Application) {
    gio::spawn_blocking(move || {
        match loop {
            // read length
-            let len = match rx.read_u64(Endian::Big) {
-                Ok(l) => l,
+            let mut len = [0u8; 8];
+            match rx.read_exact(&mut len) {
+                Ok(_) => (),
                Err(e) if e.kind() == ErrorKind::UnexpectedEof => break Ok(()),
                Err(e) => break Err(e),
            };
+            let len = usize::from_be_bytes(len);

            // read payload
-            let mut buf = vec![0u8; len as usize];
+            let mut buf = vec![0u8; len];
            match rx.read_exact(&mut buf) {
                Ok(_) => (),
                Err(e) if e.kind() == ErrorKind::UnexpectedEof => break Ok(()),
--- a/src/frontend/gtk/window.rs
+++ b/src/frontend/gtk/window.rs
@@ -10,7 +10,6 @@ use std::net::TcpStream;

 use adw::prelude::*;
 use adw::subclass::prelude::*;
-use endi::{Endian, WriteBytes};
 use glib::{clone, Object};
 use gtk::{
    gio,
@@ -266,7 +265,8 @@ impl Window {
        let mut stream = self.imp().stream.borrow_mut();
        let stream = stream.as_mut().unwrap();
        let bytes = json.as_bytes();
-        if let Err(e) = stream.write_u64(Endian::Big, bytes.len() as u64) {
+        let len = bytes.len().to_be_bytes();
+        if let Err(e) = stream.write(&len) {
            log::error!("error sending message: {e}");
        };
        if let Err(e) = stream.write(bytes) {
--- a/src/main.rs
+++ b/src/main.rs
@@ -68,12 +68,10 @@ fn run_service(config: &Config) -> Result<()> {
    // run async event loop
    runtime.block_on(LocalSet::new().run_until(async {
        // run main loop
-        log::info!("Press {:?} to release the mouse", config.release_bind);
+        log::info!("Press Ctrl+Alt+Shift+Super to release the mouse");

        let server = Server::new(config);
-        server
-            .run(config.capture_backend, config.emulation_backend)
-            .await?;
+        server.run().await?;

        log::debug!("service exiting");
        anyhow::Ok(())
--- a/src/scancode.rs
+++ b/src/scancode.rs
@@ -3,8 +3,6 @@ use serde::{Deserialize, Serialize};

 /*
 * https://learn.microsoft.com/en-us/windows/win32/inputdev/about-keyboard-input
- * https://download.microsoft.com/download/1/6/1/161ba512-40e2-4cc9-843a-923143f3456c/translate.pdf
- * https://kbd-project.org/docs/scancodes/scancodes-1.html
 */
 #[repr(u32)]
 #[derive(Debug, Clone, Copy, TryFromPrimitive)]
@@ -122,15 +120,15 @@ pub enum Windows {
    KeyF21 = 0x006C,
    KeyF22 = 0x006D,
    KeyF23 = 0x006E,
-    KeyF24 = 0x0076, // KeyLANG5
+    KeyF24 = 0x0076,
    KeypadComma = 0x007E,
    KeyInternational1 = 0x0073,
    KeyInternational2 = 0x0070,
-    KeyInternational3 = 0x007D, // typo in doc -> its Int'l 3 not Int'l 2
+    KeyInternational3 = 0x007D,
    #[allow(dead_code)]
-    KeyInternational4 = 0x0079,
+    KeyInternational4 = 0x0079, // FIXME unused
    #[allow(dead_code)]
-    KeyInternational5 = 0x007B,
+    KeyInternational5 = 0x007B, // FIXME unused
    // KeyInternational6 = 0x005C,
    KeyLANG1 = 0x0072,
    KeyLANG2 = 0x0071,
@@ -143,7 +141,6 @@ pub enum Windows {
    KeyLeftGUI = 0xE05B,
    KeyRightCtrl = 0xE01D,
    KeyRightShift = 0x0036,
-    KeyFakeRightShift = 0xE036,
    KeyRightAlt = 0xE038,
    KeyRightGUI = 0xE05C,
    KeyScanNextTrack = 0xE019,
@@ -296,7 +293,7 @@ pub enum Linux {
    KeyPause = 119,
    KeyScale = 120, /* AL Compiz Scale (Expose) */
    KeyKpcomma = 121,
-    KeyHanguel = 122,
+    KeyHangeul = 122,
    // KEY_HANGUEL = KeyHangeul,
    KeyHanja = 123,
    KeyYen = 124,
@@ -521,16 +518,16 @@ impl TryFrom<Linux> for Windows {
            Linux::KeyKp3 => Ok(Self::Keypad3PageDn),
            Linux::KeyKp0 => Ok(Self::Keypad0Insert),
            Linux::KeyKpDot => Ok(Self::KeypadDot),
-            Linux::KeyZenkakuhankaku => Ok(Self::KeyF24), // KeyLANG5
-            Linux::Key102nd => Ok(Self::KeyNonUSSlashBar), // TODO unsure
+            Linux::KeyZenkakuhankaku => Ok(Self::KeyLANG1), // TODO unsure
+            Linux::Key102nd => Ok(Self::KeyNonUSSlashBar),  // TODO unsure
            Linux::KeyF11 => Ok(Self::KeyF11),
            Linux::KeyF12 => Ok(Self::KeyF12),
-            Linux::KeyRo => Ok(Self::KeyInternational1),
-            Linux::KeyKatakana => Ok(Self::KeyLANG3),
-            Linux::KeyHiragana => Ok(Self::KeyLANG4),
-            Linux::KeyHenkan => Ok(Self::KeyInternational4),
-            Linux::KeyKatakanahiragana => Ok(Self::KeyInternational2),
-            Linux::KeyMuhenkan => Ok(Self::KeyInternational5),
+            Linux::KeyRo => Ok(Self::ErrorRollOver), // TODO unsure
+            Linux::KeyKatakana => Ok(Self::KeyLANG1), // TODO unsure
+            Linux::KeyHiragana => Ok(Self::KeyLANG2), // TODO unsure
+            Linux::KeyHenkan => Ok(Self::KeyLANG3),  // TODO unsure
+            Linux::KeyKatakanahiragana => Ok(Self::KeyLANG4), // TODO unsure
+            Linux::KeyMuhenkan => Ok(Self::KeyLANG4), // TODO unsure
            Linux::KeyKpJpComma => Ok(Self::KeypadComma),
            Linux::KeyKpEnter => Ok(Self::KeypadEnter),
            Linux::KeyRightCtrl => Ok(Self::KeyRightCtrl),
@@ -558,9 +555,9 @@ impl TryFrom<Linux> for Windows {
            Linux::KeyPause => Ok(Self::KeyPause),
            Linux::KeyScale => Err(()), // TODO
            Linux::KeyKpcomma => Ok(Self::KeypadComma),
-            Linux::KeyHanguel => Ok(Self::KeyLANG1), // FIXME should be 00F2?
-            Linux::KeyHanja => Ok(Self::KeyLANG2),   // FIXME should be 00F1?
-            Linux::KeyYen => Ok(Self::KeyInternational3),
+            Linux::KeyHangeul => Ok(Self::KeyInternational1), // TODO unsure
+            Linux::KeyHanja => Ok(Self::KeyInternational2),   // TODO unsure
+            Linux::KeyYen => Ok(Self::KeyInternational3),     // TODO unsure
            Linux::KeyLeftMeta => Ok(Self::KeyLeftGUI),
            Linux::KeyRightmeta => Ok(Self::KeyRightGUI),
            Linux::KeyCompose => Ok(Self::KeyApplication),
@@ -810,22 +807,21 @@ impl TryFrom<Windows> for Linux {
            Windows::KeyF23 => Ok(Self::KeyF23),
            Windows::KeyF24 => Ok(Self::KeyF24),
            Windows::KeypadComma => Ok(Self::KeyKpcomma),
-            Windows::KeyInternational1 => Ok(Self::KeyRo),
-            Windows::KeyInternational2 => Ok(Self::KeyKatakanahiragana),
+            Windows::KeyInternational1 => Ok(Self::KeyHangeul),
+            Windows::KeyInternational2 => Ok(Self::KeyHanja),
            Windows::KeyInternational3 => Ok(Self::KeyYen),
-            Windows::KeyInternational4 => Ok(Self::KeyHenkan),
-            Windows::KeyInternational5 => Ok(Self::KeyMuhenkan),
-            Windows::KeyLANG1 => Ok(Self::KeyHanguel),
-            Windows::KeyLANG2 => Ok(Self::KeyHanja),
-            Windows::KeyLANG3 => Ok(Self::KeyKatakana),
-            Windows::KeyLANG4 => Ok(Self::KeyHiragana),
+            Windows::KeyInternational4 => Err(()),
+            Windows::KeyInternational5 => Err(()),
+            Windows::KeyLANG1 => Ok(Self::KeyKatakana),
+            Windows::KeyLANG2 => Ok(Self::KeyHiragana),
+            Windows::KeyLANG3 => Ok(Self::KeyHenkan),
+            Windows::KeyLANG4 => Ok(Self::KeyKatakanahiragana),
            Windows::KeyLeftCtrl => Ok(Self::KeyLeftCtrl),
            Windows::KeyLeftShift => Ok(Self::KeyLeftShift),
            Windows::KeyLeftAlt => Ok(Self::KeyLeftAlt),
            Windows::KeyLeftGUI => Ok(Self::KeyLeftMeta),
            Windows::KeyRightCtrl => Ok(Self::KeyRightCtrl),
            Windows::KeyRightShift => Ok(Self::KeyRightShift),
-            Windows::KeyFakeRightShift => Ok(Self::KeyRightShift),
            Windows::KeyRightAlt => Ok(Self::KeyRightalt),
            Windows::KeyRightGUI => Ok(Self::KeyRightmeta),
            Windows::KeyScanNextTrack => Ok(Self::KeyNextsong),
--- a/src/server.rs
+++ b/src/server.rs
@@ -8,7 +8,7 @@ use tokio::signal;

 use crate::{
    client::{ClientConfig, ClientHandle, ClientManager, ClientState},
-    config::{CaptureBackend, Config, EmulationBackend},
+    config::Config,
    dns,
    frontend::{FrontendListener, FrontendRequest},
    server::capture_task::CaptureEvent,
@@ -77,11 +77,7 @@ impl Server {
        }
    }

-    pub async fn run(
-        &self,
-        capture_backend: Option<CaptureBackend>,
-        emulation_backend: Option<EmulationBackend>,
-    ) -> anyhow::Result<()> {
+    pub async fn run(&self) -> anyhow::Result<()> {
        // create frontend communication adapter
        let frontend = match FrontendListener::new().await {
            Some(f) => f?,
@@ -101,22 +97,20 @@ impl Server {

        // input capture
        let (mut capture_task, capture_channel) = capture_task::new(
-            capture_backend,
            self.clone(),
            sender_tx.clone(),
            timer_tx.clone(),
            self.release_bind.clone(),
-        )?;
+        );

        // input emulation
        let (mut emulation_task, emulate_channel) = emulation_task::new(
-            emulation_backend,
            self.clone(),
            receiver_rx,
            sender_tx.clone(),
            capture_channel.clone(),
            timer_tx,
-        )?;
+        );

        // create dns resolver
        let resolver = dns::DnsResolver::new().await?;
--- a/src/server/capture_task.rs
+++ b/src/server/capture_task.rs
@@ -5,9 +5,8 @@ use std::{collections::HashSet, net::SocketAddr};
 use tokio::{process::Command, sync::mpsc::Sender, task::JoinHandle};

 use crate::{
-    capture::{self, error::CaptureCreationError, InputCapture},
+    capture::{self, InputCapture},
    client::{ClientEvent, ClientHandle},
-    config::CaptureBackend,
    event::{Event, KeyboardEvent},
    scancode,
    server::State,
@@ -26,15 +25,14 @@ pub enum CaptureEvent {
 }

 pub fn new(
-    backend: Option<CaptureBackend>,
    server: Server,
    sender_tx: Sender<(Event, SocketAddr)>,
    timer_tx: Sender<()>,
    release_bind: Vec<scancode::Linux>,
-) -> Result<(JoinHandle<Result<()>>, Sender<CaptureEvent>), CaptureCreationError> {
+) -> (JoinHandle<Result<()>>, Sender<CaptureEvent>) {
    let (tx, mut rx) = tokio::sync::mpsc::channel(32);
    let task = tokio::task::spawn_local(async move {
-        let mut capture = capture::create(backend).await?;
+        let mut capture = capture::create().await;
        let mut pressed_keys = HashSet::new();
        loop {
            tokio::select! {
@@ -64,7 +62,7 @@ pub fn new(
        }
        anyhow::Ok(())
    });
-    Ok((task, tx))
+    (task, tx)
 }

 fn update_pressed_keys(pressed_keys: &mut HashSet<scancode::Linux>, key: u32, state: u8) {
--- a/src/server/emulation_task.rs
+++ b/src/server/emulation_task.rs
@@ -8,8 +8,7 @@ use tokio::{

 use crate::{
    client::{ClientEvent, ClientHandle},
-    config::EmulationBackend,
-    emulate::{self, error::EmulationCreationError, InputEmulation},
+    emulate::{self, InputEmulation},
    event::{Event, KeyboardEvent},
    scancode,
    server::State,
@@ -28,16 +27,15 @@ pub enum EmulationEvent {
 }

 pub fn new(
-    backend: Option<EmulationBackend>,
    server: Server,
    mut udp_rx: Receiver<Result<(Event, SocketAddr)>>,
    sender_tx: Sender<(Event, SocketAddr)>,
    capture_tx: Sender<CaptureEvent>,
    timer_tx: Sender<()>,
-) -> Result<(JoinHandle<Result<()>>, Sender<EmulationEvent>), EmulationCreationError> {
+) -> (JoinHandle<Result<()>>, Sender<EmulationEvent>) {
    let (tx, mut rx) = tokio::sync::mpsc::channel(32);
    let emulate_task = tokio::task::spawn_local(async move {
-        let mut emulate = emulate::create(backend).await?;
+        let mut emulate = emulate::create().await;
        let mut last_ignored = None;

        loop {
@@ -77,7 +75,7 @@ pub fn new(
        emulate.destroy().await;
        anyhow::Ok(())
    });
-    Ok((emulate_task, tx))
+    (emulate_task, tx)
 }

 async fn handle_udp_rx(
--- a/src/server/frontend_task.rs
+++ b/src/server/frontend_task.rs
@@ -107,8 +107,7 @@ async fn handle_frontend_event(
    log::debug!("frontend: {event:?}");
    match event {
        FrontendRequest::Create => {
-            let handle = add_client(server, frontend).await;
-            resolve_dns(server, resolve_tx, handle).await;
+            add_client(server, frontend).await;
        }
        FrontendRequest::Activate(handle, active) => {
            if active {
@@ -141,12 +140,10 @@ async fn handle_frontend_event(
            return true;
        }
        FrontendRequest::UpdateFixIps(handle, fix_ips) => {
-            update_fix_ips(server, handle, fix_ips).await;
-            resolve_dns(server, resolve_tx, handle).await;
+            update_fix_ips(server, resolve_tx, handle, fix_ips).await;
        }
        FrontendRequest::UpdateHostname(handle, hostname) => {
            update_hostname(server, resolve_tx, handle, hostname).await;
-            resolve_dns(server, resolve_tx, handle).await;
        }
        FrontendRequest::UpdatePort(handle, port) => {
            update_port(server, handle, port).await;
@@ -155,41 +152,31 @@ async fn handle_frontend_event(
            update_pos(server, handle, capture, emulate, pos).await;
        }
        FrontendRequest::ResolveDns(handle) => {
-            resolve_dns(server, resolve_tx, handle).await;
+            let hostname = server
+                .client_manager
+                .borrow()
+                .get(handle)
+                .and_then(|(c, _)| c.hostname.clone());
+            if let Some(hostname) = hostname {
+                let _ = resolve_tx.send(DnsRequest { hostname, handle }).await;
+            }
        }
    };
    false
 }

-async fn resolve_dns(server: &Server, resolve_tx: &Sender<DnsRequest>, handle: ClientHandle) {
-    let hostname = server
-        .client_manager
-        .borrow()
-        .get(handle)
-        .and_then(|(c, _)| c.hostname.clone());
-    if let Some(hostname) = hostname {
-        let _ = resolve_tx
-            .send(DnsRequest {
-                hostname: hostname.clone(),
-                handle,
-            })
-            .await;
-    }
-}
-
 async fn broadcast(frontend: &mut FrontendListener, event: FrontendEvent) {
    if let Err(e) = frontend.broadcast_event(event).await {
        log::error!("error notifying frontend: {e}");
    }
 }

-pub async fn add_client(server: &Server, frontend: &mut FrontendListener) -> ClientHandle {
+pub async fn add_client(server: &Server, frontend: &mut FrontendListener) {
    let handle = server.client_manager.borrow_mut().add_client();
    log::info!("added client {handle}");

    let (c, s) = server.client_manager.borrow().get(handle).unwrap().clone();
    broadcast(frontend, FrontendEvent::Created(handle, c, s)).await;
-    handle
 }

 pub async fn deactivate_client(
@@ -264,13 +251,25 @@ pub async fn remove_client(
    }
 }

-async fn update_fix_ips(server: &Server, handle: ClientHandle, fix_ips: Vec<IpAddr>) {
-    let mut client_manager = server.client_manager.borrow_mut();
-    let Some((c, _)) = client_manager.get_mut(handle) else {
-        return;
+async fn update_fix_ips(
+    server: &Server,
+    resolve_tx: &Sender<DnsRequest>,
+    handle: ClientHandle,
+    fix_ips: Vec<IpAddr>,
+) {
+    let hostname = {
+        let mut client_manager = server.client_manager.borrow_mut();
+        let Some((c, _)) = client_manager.get_mut(handle) else {
+            return;
+        };
+
+        c.fix_ips = fix_ips;
+        c.hostname.clone()
    };

-    c.fix_ips = fix_ips;
+    if let Some(hostname) = hostname {
+        let _ = resolve_tx.send(DnsRequest { hostname, handle }).await;
+    }
 }

 async fn update_hostname(