cjk

This reverts commit c9391fb894.

Cargo.lock

@@ -1324,7 +1324,7 @@ dependencies = [
 [[package]]
 name = "clipboard-master"
 version = "4.0.0-beta.6"
-source = "git+https://github.com/rustdesk-org/clipboard-master#ddc39f00a6211959489ae683aa6ae6eedf03a809"
+source = "git+https://github.com/rustdesk-org/clipboard-master#7762d74e38db37cfeb6ded88c964b9cdbddfb6db"
 dependencies = [
  "objc",
  "objc-foundation",
@@ -6920,7 +6920,7 @@ dependencies = [
 [[package]]
 name = "rdev"
 version = "0.5.0-2"
-source = "git+https://github.com/rustdesk-org/rdev#f9b60b1dd0f3300a1b797d7a74c116683cd232c8"
+source = "git+https://github.com/rustdesk-org/rdev#871bf1c856d6a30af2f56ab8848396a025140855"
 dependencies = [
  "cocoa 0.24.1",
  "core-foundation 0.9.4",
@@ -9733,9 +9733,9 @@ dependencies = [
 
 [[package]]
 name = "wayland-protocols-wlr"
-version = "0.3.3"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd993de54a40a40fbe5601d9f1fbcaef0aebcc5fda447d7dc8f6dcbaae4f8953"
+checksum = "efd94963ed43cf9938a090ca4f7da58eb55325ec8200c3848963e98dc25b78ec"
 dependencies = [
  "bitflags 2.9.1",
  "wayland-backend",
@@ -10838,16 +10838,15 @@ dependencies = [
 
 [[package]]
 name = "wl-clipboard-rs"
-version = "0.9.0"
+version = "0.9.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4de22eebb1d1e2bad2d970086e96da0e12cde0b411321e5b0f7b2a1f876aa26f"
+checksum = "e9651471a32e87d96ef3a127715382b2d11cc7c8bb9822ded8a7cc94072eb0a3"
 dependencies = [
  "libc",
  "log",
  "os_pipe",
- "rustix 0.38.34",
+ "rustix 1.1.2",
- "tempfile",
+ "thiserror 2.0.17",
- "thiserror 1.0.61",
  "tree_magic_mini",
  "wayland-backend",
  "wayland-client",

flutter/lib/common.dart

@@ -598,22 +598,6 @@ class MyTheme {
     }
   }
 
-  /// Applies [fallbacks] as fontFamilyFallback to every text style in both
-  /// themes. Called once at startup on ARM64 Linux after a CJK font has been
-  /// loaded via FontLoader (see flutter/flutter#139293).
-  static void applyFontFallback(List<String> fallbacks) {
-    lightTheme = lightTheme.copyWith(
-      textTheme: lightTheme.textTheme.apply(fontFamilyFallback: fallbacks),
-      primaryTextTheme:
-          lightTheme.primaryTextTheme.apply(fontFamilyFallback: fallbacks),
-    );
-    darkTheme = darkTheme.copyWith(
-      textTheme: darkTheme.textTheme.apply(fontFamilyFallback: fallbacks),
-      primaryTextTheme:
-          darkTheme.primaryTextTheme.apply(fontFamilyFallback: fallbacks),
-    );
-  }
-
   static ThemeMode currentThemeMode() {
     final preference = getThemeModePreference();
     if (preference == ThemeMode.system) {

flutter/lib/main.dart

@@ -29,8 +29,6 @@ import 'mobile/pages/home_page.dart';
 import 'mobile/pages/server_page.dart';
 import 'mobile/widgets/deploy_dialog.dart';
 import 'models/platform_model.dart';
-import 'native/font_manager.dart'
-    if (dart.library.html) 'web/font_manager.dart';
 
 import 'package:flutter_hbb/plugin/handlers.dart'
     if (dart.library.html) 'package:flutter_hbb/web/plugin/handlers.dart';
@@ -39,15 +37,10 @@ import 'package:flutter_hbb/plugin/handlers.dart'
 int? kWindowId;
 WindowType? kWindowType;
 late List<String> kBootArgs;
-bool _cjkFontLoaded = false;
 
 Future<void> main(List<String> args) async {
   earlyAssert();
   WidgetsFlutterBinding.ensureInitialized();
-  _cjkFontLoaded = await loadSystemCJKFonts();
-  if (_cjkFontLoaded) {
-    MyTheme.applyFontFallback([kLinuxCjkFontFamily]);
-  }
 
   debugPrint("launch args: $args");
   kBootArgs = List.from(args);
@@ -390,7 +383,6 @@ void _runApp(
       builder: (context, child) {
         child = _keepScaleBuilder(context, child);
         child = botToastBuilder(context, child);
-        if (_cjkFontLoaded) child = _mergeCjkFallback(context, child);
         return child;
       },
     ),
@@ -541,7 +533,6 @@ class _AppState extends State<App> with WidgetsBindingObserver {
               : (context, child) {
                   child = _keepScaleBuilder(context, child);
                   child = botToastBuilder(context, child);
-                  if (_cjkFontLoaded) child = _mergeCjkFallback(context, child);
                   if ((isDesktop && desktopType == DesktopType.main) ||
                       isWebDesktop) {
                     child = keyListenerBuilder(context, child);
@@ -595,19 +586,6 @@ _registerEventHandler() {
   }
 }
 
-/// Merges the theme's fontFamilyFallback into [DefaultTextStyle] so that
-/// bare [Text] widgets (and those with inherit:true styles) also pick up the
-/// CJK fallback font loaded on ARM64 Linux.
-Widget _mergeCjkFallback(BuildContext context, Widget? child) {
-  final result = child ?? Container();
-  final fallback = Theme.of(context).textTheme.bodyMedium?.fontFamilyFallback;
-  if (fallback == null || fallback.isEmpty) return result;
-  return DefaultTextStyle.merge(
-    style: TextStyle(fontFamilyFallback: fallback),
-    child: result,
-  );
-}
-
 Widget keyListenerBuilder(BuildContext context, Widget? child) {
   return RawKeyboardListener(
     focusNode: FocusNode(),

flutter/lib/native/font_manager.dart

@@ -1,109 +0,0 @@
-import 'dart:ffi' show Abi;
-import 'dart:io';
-import 'dart:typed_data';
-
-import 'package:flutter/foundation.dart';
-import 'package:flutter/services.dart';
-
-/// Font family name registered with [FontLoader] when a system CJK font is
-/// successfully loaded on ARM64 Linux.
-const kLinuxCjkFontFamily = 'SystemCJK';
-
-const _kFontSearchPaths = [
-  // Debian / Ubuntu (noto-fonts / fonts-noto-cjk)
-  '/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc',
-  '/usr/share/fonts/truetype/noto/NotoSansCJK-Regular.ttc',
-  '/usr/share/fonts/opentype/noto/NotoSansCJKsc-Regular.otf',
-  // Fedora / RHEL / Rocky (google-noto-sans-cjk-fonts)
-  '/usr/share/fonts/google-noto-cjk/NotoSansCJK-Regular.ttc',
-  '/usr/share/fonts/google-noto-sans-cjk-fonts/NotoSansCJK-Regular.ttc',
-  // Arch Linux (noto-fonts-cjk)
-  '/usr/share/fonts/noto-cjk/NotoSansCJK-Regular.ttc',
-  '/usr/share/fonts/noto-cjk/NotoSansCJKsc-Regular.otf',
-  // Generic fallback paths
-  '/usr/share/fonts/noto/NotoSansCJK-Regular.ttc',
-  '/usr/share/fonts/noto/NotoSansCJKsc-Regular.otf',
-  // WenQuanYi — commonly pre-installed on CJK-locale systems
-  '/usr/share/fonts/truetype/wqy/wqy-microhei.ttc',
-  '/usr/share/fonts/truetype/wqy/wqy-zenhei.ttc',
-  '/usr/share/fonts/wqy-microhei/wqy-microhei.ttc',
-  '/usr/share/fonts/wqy-zenhei/wqy-zenhei.ttc',
-];
-
-/// Loads a system CJK font on ARM64 Linux into Flutter's font registry via
-/// [FontLoader], working around the missing fontconfig support in the
-/// flutter-elinux engine (https://github.com/flutter/flutter/issues/139293).
-///
-/// Returns true if a CJK font was successfully loaded; false otherwise.
-/// On all other platforms this is a no-op and returns false immediately.
-Future<bool> loadSystemCJKFonts() async {
-  if (Abi.current() != Abi.linuxArm64) return false;
-
-  final path = await _findCjkFontPath();
-  if (path == null) {
-    debugPrint('ARM64 Linux: no CJK font found; CJK text may not render');
-    return false;
-  }
-
-  try {
-    final loader = FontLoader(kLinuxCjkFontFamily);
-    final bytes = await File(path).readAsBytes();
-    loader.addFont(Future.value(ByteData.view(bytes.buffer, bytes.offsetInBytes, bytes.lengthInBytes)));
-    await loader.load();
-    debugPrint('ARM64 Linux: loaded CJK font from $path');
-    return true;
-  } catch (e) {
-    debugPrint('ARM64 Linux: failed to load CJK font: $e');
-    return false;
-  }
-}
-
-Future<String?> _findCjkFontPath() async {
-  // Query fc-list for each CJK script separately.  Fonts present in all three
-  // sets (zh ∩ ja ∩ ko) are true pan-CJK fonts; prefer them so we don't
-  // accidentally pick a Chinese-only font that lacks Japanese kana or Korean
-  // hangul glyphs.  fc-list is a fontconfig CLI tool available on most Linux
-  // systems independent of whether the Flutter engine was built with fontconfig.
-  final byLang = <String, Set<String>>{};
-  for (final lang in const ['zh', 'ja', 'ko']) {
-    final paths = <String>{};
-    try {
-      final r =
-          await Process.run('fc-list', [':lang=$lang', '--format=%{file}\n']);
-      if (r.exitCode == 0) {
-        for (final line in r.stdout.toString().split('\n')) {
-          final p = line.trim();
-          if (p.isNotEmpty && File(p).existsSync()) paths.add(p);
-        }
-      }
-    } catch (e) {
-      debugPrint('ARM64 Linux: fc-list failed for lang=$lang: $e');
-    }
-    byLang[lang] = paths;
-  }
-
-  final panCjk = byLang['zh']!
-      .intersection(byLang['ja']!)
-      .intersection(byLang['ko']!);
-  final anyCjk =
-      byLang.values.fold(<String>{}, (acc, s) => acc..addAll(s));
-
-  // Among candidates, prefer well-known pan-CJK font families.
-  String? pick(Iterable<String> pool) {
-    const preferred = ['notosanscjk', 'sourcehansans', 'sourcehanserif'];
-    for (final name in preferred) {
-      for (final p in pool) {
-        if (p.toLowerCase().contains(name)) return p;
-      }
-    }
-    return pool.isNotEmpty ? pool.first : null;
-  }
-
-  final found = pick(panCjk) ?? pick(anyCjk);
-  if (found != null) return found;
-
-  for (final p in _kFontSearchPaths) {
-    if (File(p).existsSync()) return p;
-  }
-  return null;
-}

flutter/lib/web/font_manager.dart

@@ -1,8 +0,0 @@
-/// Web stub for `native/font_manager.dart`.
-///
-/// The native implementation depends on `dart:io` (Process/File/Platform) to
-/// load a system CJK font on ARM64 Linux, which cannot compile for the web
-/// target. The web build has no such fontconfig limitation, so this is a no-op.
-const kLinuxCjkFontFamily = 'SystemCJK';
-
-Future<bool> loadSystemCJKFonts() async => false;

src/clipboard.rs

@@ -868,6 +868,7 @@ pub mod clipboard_listener {
             .unwrap()
             .insert(name.clone(), tx);
 
+        cleanup_stale_listener(&mut listener_lock);
         if listener_lock.handle.is_none() {
             log::info!("Start clipboard listener thread");
             let handler = Handler {
@@ -893,6 +894,24 @@ pub mod clipboard_listener {
         Ok(())
     }
 
+    fn cleanup_stale_listener(listener: &mut ClipboardListener) {
+        if !listener
+            .handle
+            .as_ref()
+            .map(|(_, h)| h.is_finished())
+            .unwrap_or(false)
+        {
+            return;
+        }
+        if let Some((shutdown, h)) = listener.handle.take() {
+            log::warn!("Cleaning up stale clipboard listener handle");
+            if let Err(e) = h.join() {
+                log::error!("Clipboard listener thread panicked during stale cleanup: {:?}", e);
+            }
+            drop(shutdown);
+        }
+    }
+
     pub fn unsubscribe(name: &str) {
         log::info!("Unsubscribe clipboard listener: {}", name);
         let mut listener_lock = CLIPBOARD_LISTENER.lock().unwrap();

src/keyboard.rs

@@ -1245,11 +1245,49 @@ pub fn legacy_keyboard_mode(event: &Event, mut key_event: KeyEvent) -> Vec<KeyEv
 
 #[inline]
 pub fn map_keyboard_mode(_peer: &str, event: &Event, key_event: KeyEvent) -> Vec<KeyEvent> {
+    if let Some(evt) = windows_peer_special_key(_peer, event) {
+        return vec![evt];
+    }
+
     _map_keyboard_mode(_peer, event, key_event)
         .map(|e| vec![e])
         .unwrap_or_default()
 }
 
+fn windows_peer_special_key(peer: &str, event: &Event) -> Option<KeyEvent> {
+    if peer != OS_LOWER_WINDOWS {
+        return None;
+    }
+
+    let (key, down) = match event.event_type {
+        EventType::KeyPress(key) => (key, true),
+        EventType::KeyRelease(key) => (key, false),
+        _ => return None,
+    };
+
+    // Handle only `Pause` for Windows peers for now.
+    // Windows has no normal scan code for `Pause`, so send it as a legacy control key.
+    #[cfg(target_os = "windows")]
+    let is_pause = {
+        // The Windows scan code can look like `NumLock`; VK_PAUSE distinguishes it.
+        let pause_vk_code = rdev::win_code_from_key(Key::Pause);
+        key == Key::Pause || pause_vk_code == Some(event.platform_code as _)
+    };
+    #[cfg(not(target_os = "windows"))]
+    let is_pause = key == Key::Pause;
+    if !is_pause {
+        return None;
+    }
+
+    let mut key_event = KeyEvent::new();
+    key_event.mode = KeyboardMode::Legacy.into();
+    key_event.down = down;
+    key_event.set_control_key(ControlKey::Pause);
+    let (alt, ctrl, shift, command) = client::get_modifiers_state(false, false, false, false);
+    client::legacy_modifiers(&mut key_event, alt, ctrl, shift, command);
+    Some(key_event)
+}
+
 fn _map_keyboard_mode(_peer: &str, event: &Event, mut key_event: KeyEvent) -> Option<KeyEvent> {
     match event.event_type {
         EventType::KeyPress(..) => {
@@ -1421,6 +1459,11 @@ fn is_press(event: &Event) -> bool {
 pub fn translate_keyboard_mode(peer: &str, event: &Event, key_event: KeyEvent) -> Vec<KeyEvent> {
     let mut events: Vec<KeyEvent> = Vec::new();
 
+    if let Some(evt) = windows_peer_special_key(peer, event) {
+        events.push(evt);
+        return events;
+    }
+
     if let Some(unicode_info) = &event.unicode {
         if unicode_info.is_dead {
             #[cfg(target_os = "macos")]

src/lang.rs

@@ -103,15 +103,29 @@ pub const LANGS: &[(&str, &str)] = &[
     ("gu", "ગુજરાતી"),
 ];
 
-#[cfg(not(any(target_os = "android", target_os = "ios")))]
+pub(crate) fn cjk_ui_unavailable() -> bool {
-pub fn translate(name: String) -> String {
+    cfg!(all(
-    let locale = sys_locale::get_locale().unwrap_or_default();
+        target_os = "linux",
-    translate_locale(name, &locale)
+        target_arch = "aarch64",
+        feature = "flutter"
+    ))
 }
 
-pub fn translate_locale(name: String, locale: &str) -> String {
+pub(crate) fn is_cjk_lang(lang_or_locale: &str) -> bool {
+    let lang = lang_or_locale
+        .split(|c| c == '-' || c == '_')
+        .next()
+        .unwrap_or_default()
+        .to_lowercase();
+    matches!(lang.as_str(), "zh" | "ja" | "ko")
+}
+
+fn resolve_lang(saved_lang: &str, locale: &str, cjk_fallback: bool) -> String {
     let locale = locale.to_lowercase();
-    let mut lang = hbb_common::config::LocalConfig::get_option("lang").to_lowercase();
+    let mut lang = saved_lang.to_lowercase();
+    if cjk_fallback && is_cjk_lang(&lang) {
+        return "en".to_owned();
+    }
     if lang.is_empty() {
         // zh_CN on Linux, zh-Hans-CN on mac, zh_CN_#Hans on Android
         if locale.starts_with("zh") {
@@ -131,7 +145,25 @@ pub fn translate_locale(name: String, locale: &str) -> String {
             .unwrap_or_default()
             .to_owned();
     }
-    let lang = lang.to_lowercase();
+    if cjk_fallback && is_cjk_lang(&lang) {
+        "en".to_owned()
+    } else {
+        lang
+    }
+}
+
+#[cfg(not(any(target_os = "android", target_os = "ios")))]
+pub fn translate(name: String) -> String {
+    let locale = sys_locale::get_locale().unwrap_or_default();
+    translate_locale(name, &locale)
+}
+
+pub fn translate_locale(name: String, locale: &str) -> String {
+    let lang = resolve_lang(
+        &hbb_common::config::LocalConfig::get_option("lang"),
+        locale,
+        cjk_ui_unavailable(),
+    );
     let m = match lang.as_str() {
         "fr" => fr::T.deref(),
         "zh-cn" => cn::T.deref(),
@@ -275,4 +307,32 @@ mod test {
             ("{} times {4} makes {8}".to_string(), Some("2".to_string()))
         );
     }
+
+    #[test]
+    fn test_resolve_lang_forces_english_for_saved_cjk_when_target_disables_cjk() {
+        use super::resolve_lang as f;
+
+        assert_eq!(f("zh-cn", "en-US", true), "en");
+        assert_eq!(f("zh-tw", "en-US", true), "en");
+        assert_eq!(f("ja", "en-US", true), "en");
+        assert_eq!(f("ko", "en-US", true), "en");
+    }
+
+    #[test]
+    fn test_resolve_lang_forces_english_for_cjk_locale_when_target_disables_cjk() {
+        use super::resolve_lang as f;
+
+        assert_eq!(f("", "zh_CN", true), "en");
+        assert_eq!(f("", "ja-JP", true), "en");
+        assert_eq!(f("", "ko_KR", true), "en");
+    }
+
+    #[test]
+    fn test_resolve_lang_preserves_cjk_when_target_allows_cjk() {
+        use super::resolve_lang as f;
+
+        assert_eq!(f("zh-cn", "en-US", false), "zh-cn");
+        assert_eq!(f("", "zh_TW", false), "zh-tw");
+        assert_eq!(f("", "ja-JP", false), "ja");
+    }
 }

src/lang/it.rs

@@ -759,7 +759,7 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("remember-wayland-keyboard-choice-tip", "Non chiedere più per questo computer remoto"),
         ("Why this happens", "Perché accade questo"),
         ("Switch display", "Cambia schermo"),
-        ("Show monitor switch button on the main toolbar", "Mostra il pulsante di cambio monitor nella barra degli strumenti principale"),
+        ("Show monitor switch button on the main toolbar", "Visualizza nella barra strumenti principale il pulsante per il cambio schermo"),
-        ("Show on the minimized toolbar", "Mostra nella barra degli strumenti ridotta a icona"),
+        ("Show on the minimized toolbar", "Visualizza nella barra strumenti ridotta a icona"),
     ].iter().cloned().collect();
 }

src/lang/ptbr.rs

@@ -16,18 +16,18 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Control Remote Desktop", "Controle um Computador Remoto"),
         ("Transfer file", "Transferir arquivos"),
         ("Connect", "Conectar"),
-        ("Recent sessions", "Sessões Recentes"),
+        ("Recent sessions", "Sessões recentes"),
-        ("Address book", "Lista de Endereços"),
+        ("Address book", "Lista de endereços"),
         ("Confirmation", "Confirmação"),
         ("TCP tunneling", "Tunelamento TCP"),
         ("Remove", "Remover"),
-        ("Refresh random password", "Atualizar senha aleatória"),
+        ("Refresh random password", "Gerar nova senha aleatória"),
-        ("Set your own password", "Configure sua própria senha"),
+        ("Set your own password", "Definir sua própria senha"),
         ("Enable keyboard/mouse", "Habilitar teclado/mouse"),
         ("Enable clipboard", "Habilitar área de transferência"),
         ("Enable file transfer", "Habilitar transferência de arquivos"),
         ("Enable TCP tunneling", "Habilitar tunelamento TCP"),
-        ("IP Whitelisting", "Lista de IPs Confiáveis"),
+        ("IP Whitelisting", "Lista de IPs Permitidos"),
         ("ID/Relay Server", "Servidor ID/Relay"),
         ("Import server config", "Importar Configuração do Servidor"),
         ("Export Server Config", "Exportar Configuração do Servidor"),
@@ -320,12 +320,12 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Exit Fullscreen", "Sair da Tela Cheia"),
         ("Fullscreen", "Tela Cheia"),
         ("Mobile Actions", "Ações móveis"),
-        ("Select Monitor", "Selecionar monitor"),
+        ("Select Monitor", "Selecionar tela"),
         ("Control Actions", "Controlar ações"),
         ("Display Settings", "Configurações de exibição"),
         ("Ratio", "Proporção"),
         ("Image Quality", "Qualidade de imagem"),
-        ("Scroll Style", "Estilo de Rolagem"),
+        ("Scroll Style", "Estilo de rolagem"),
         ("Show Toolbar", "Mostrar barra de ferramentas"),
         ("Hide Toolbar", "Ocultar barra de ferramentas"),
         ("Direct Connection", "Conexão Direta"),
@@ -353,7 +353,7 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Disconnect all devices?", "Desconectar todos os dispositivos?"),
         ("Clear", "Limpar"),
         ("Audio Input Device", "Dispositivo de entrada de áudio"),
-        ("Use IP Whitelisting", "Utilizar lista de IPs confiáveis"),
+        ("Use IP Whitelisting", "Utilizar lista de IPs permitidos"),
         ("Network", "Rede"),
         ("Pin Toolbar", "Fixar barra de ferramentas"),
         ("Unpin Toolbar", "Desafixar barra de ferramentas"),
@@ -463,7 +463,7 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Empty Password", "Senha Vazia"),
         ("Me", "Eu"),
         ("identical_file_tip", "Este arquivo é idêntico ao do parceiro."),
-        ("show_monitors_tip", "Mostrar monitores na barra de ferramentas"),
+        ("show_monitors_tip", "Mostrar telas na barra de ferramentas"),
         ("View Mode", "Modo de visualização"),
         ("login_linux_tip", "Você precisa fazer login na conta Linux remota para habilitar uma sessão de desktop X"),
         ("verify_rustdesk_password_tip", "Verifique a senha do RustDesk"),
@@ -674,7 +674,7 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("dont-show-again-tip", "Não mostrar novamente"),
         ("Take screenshot", "Capturar tela"),
         ("Taking screenshot", "Capturando tela"),
-        ("screenshot-merged-screen-not-supported-tip", "Mesclar a captura de tela de múltiplos monitores não é suportada no momento. Por favor, alterne para um único monitor e tente novamente."),
+        ("screenshot-merged-screen-not-supported-tip", "A captura de tela de múltiplas telas não é suportada no momento. Por favor, alterne para uma única tela e tente novamente."),
         ("screenshot-action-tip", "Por favor, selecione como deseja continuar com a captura de tela."),
         ("Save as", "Salvar como"),
         ("Copy to clipboard", "Copiar para área de transferência"),
@@ -694,7 +694,7 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("Enable UDP hole punching", "Habilitar UDP hole punching"),
         ("View camera", "Visualizar câmera"),
         ("Enable camera", "Habilitar câmera"),
-        ("No cameras", "Nenhuma câmeras"),
+        ("No cameras", "Nenhuma câmera"),
         ("view_camera_unsupported_tip", "O dispositivo remoto não suporta visualização da câmera."),
         ("Terminal", "Terminal"),
         ("Enable terminal", "Habilitar terminal"),
@@ -759,7 +759,7 @@ pub static ref T: std::collections::HashMap<&'static str, &'static str> =
         ("remember-wayland-keyboard-choice-tip", "Não perguntar novamente para este computador remoto"),
         ("Why this happens", "Por que isso acontece"),
         ("Switch display", "Trocar de tela"),
-        ("Show monitor switch button on the main toolbar", "Mostrar o botão de troca de monitor na barra de ferramentas principal"),
+        ("Show monitor switch button on the main toolbar", "Mostrar botão de troca de tela na barra de ferramentas"),
         ("Show on the minimized toolbar", "Mostrar na barra de ferramentas minimizada"),
     ].iter().cloned().collect();
 }

src/platform/linux_desktop_manager.rs

@@ -51,6 +51,7 @@ fn check_desktop_manager() {
 pub fn start_xdesktop() {
     debug_assert!(crate::is_server());
     std::thread::spawn(|| {
+        DesktopManager::recover_orphaned_session();
         *DESKTOP_MANAGER.lock().unwrap() = Some(DesktopManager::new());
 
         let interval = time::Duration::from_millis(super::SERVICE_INTERVAL);
@@ -462,9 +463,10 @@ impl DesktopManager {
         let (child_xorg, child_wm) = Self::start_x11(uid, gid, username, display_num, &envs)?;
         is_child_running.store(true, Ordering::SeqCst);
 
-        // capture the logind session scope (from a live child) for teardown, see
+        // capture the logind session scope (from a live child) for teardown and crash
-        // reap_session_scope.
+        // recovery, see reap_session_scope and recover_orphaned_session.
         let scope_dir = Self::session_scope_dir(child_xorg.id());
+        Self::save_orphaned_marker(&scope_dir, display_num);
 
         log::info!("Start xorg and wm done, notify and wait xtop x11");
         allow_err!(tx_res.send("".to_owned()));
@@ -879,6 +881,66 @@ impl DesktopManager {
         std::io::Error::last_os_error().raw_os_error() == Some(hbb_common::libc::EPERM)
     }
 
+    const ORPHANED_SESSION_KEY: &'static str = "headless-orphaned-session";
+
+    fn save_orphaned_marker(scope_dir: &str, display_num: u32) {
+        // tag the marker with this boot's id: a logind session id is only unique within a
+        // boot (the counter lives in /run and resets), so recovery must not reap a recorded
+        // scope path after a reboot, when it may name a different live session.
+        let boot_id = Self::current_boot_id().unwrap_or_default();
+        hbb_common::config::LocalConfig::set_option(
+            Self::ORPHANED_SESSION_KEY.to_owned(),
+            format!("{};{};{}", scope_dir, display_num, boot_id),
+        );
+    }
+
+    fn current_boot_id() -> Option<String> {
+        std::fs::read_to_string("/proc/sys/kernel/random/boot_id")
+            .ok()
+            .map(|s| s.trim().to_owned())
+    }
+
+    fn clear_orphaned_marker() {
+        hbb_common::config::LocalConfig::set_option(
+            Self::ORPHANED_SESSION_KEY.to_owned(),
+            String::new(),
+        );
+    }
+
+    fn parse_orphaned_marker(marker: &str) -> Option<(&str, u32, &str)> {
+        let (rest, boot_id) = marker.rsplit_once(';')?;
+        let (scope_dir, display) = rest.rsplit_once(';')?;
+        Some((scope_dir, display.trim().parse::<u32>().ok()?, boot_id))
+    }
+
+    // a run that dies before wait_stop_x11 (service or --server crash) leaks the headless
+    // session scope + X lock files, the same as a missed teardown (rustdesk/rustdesk#15183).
+    // reap exactly what the dead run recorded - never a scan, so unrelated sessions are safe.
+    fn recover_orphaned_session() {
+        let marker = hbb_common::config::LocalConfig::get_option(Self::ORPHANED_SESSION_KEY);
+        if marker.is_empty() {
+            return;
+        }
+        if let Some((scope_dir, display_num, boot_id)) = Self::parse_orphaned_marker(&marker) {
+            // only reap the recorded scope when the marker is from this same boot: a leaked
+            // cgroup cannot outlive a reboot, so cross-boot there is nothing legitimate to
+            // reap, and the recorded "session-N.scope" may by then name a different live
+            // session. the X lock cleanup is pid-guarded, so run it either way.
+            let same_boot = Self::current_boot_id().map_or(false, |b| b == boot_id);
+            log::info!(
+                "Recovering leaked headless session from a previous run: scope {}, display {} (same boot: {})",
+                scope_dir,
+                display_num,
+                same_boot
+            );
+            if same_boot {
+                Self::reap_session_scope(scope_dir);
+            }
+            Self::cleanup_x_display_files(display_num);
+        }
+        Self::clear_orphaned_marker();
+    }
+
     fn try_wait_stop_x11(
         child_xorg: &mut Child,
         child_wm: &mut Child,
@@ -898,6 +960,7 @@ impl DesktopManager {
                 Self::wait_x11_children_exit(child_xorg, child_wm);
                 Self::reap_session_scope(scope_dir);
                 Self::cleanup_x_display_files(display_num);
+                Self::clear_orphaned_marker();
                 desktop_manager
                     .is_child_running
                     .store(false, Ordering::SeqCst);
@@ -1082,4 +1145,27 @@ mod tests {
 
         assert_eq!(pids, vec![100, 101, 200, 300]);
     }
+
+    #[test]
+    fn parses_orphaned_session_marker() {
+        assert_eq!(
+            DesktopManager::parse_orphaned_marker(
+                "/sys/fs/cgroup/user.slice/user-1000.slice/session-3.scope;7;abc-123"
+            ),
+            Some((
+                "/sys/fs/cgroup/user.slice/user-1000.slice/session-3.scope",
+                7,
+                "abc-123"
+            ))
+        );
+        // an empty scope still carries the display so its stale X lock can be cleaned
+        assert_eq!(DesktopManager::parse_orphaned_marker(";5;abc-123"), Some(("", 5, "abc-123")));
+        // an empty boot id never matches the live one, so the scope reap is skipped
+        assert_eq!(DesktopManager::parse_orphaned_marker("/scope;5;"), Some(("/scope", 5, "")));
+        assert_eq!(DesktopManager::parse_orphaned_marker(""), None);
+        assert_eq!(DesktopManager::parse_orphaned_marker("garbage"), None);
+        // the pre-boot-id two-field format no longer parses, recovery just skips it
+        assert_eq!(DesktopManager::parse_orphaned_marker("/scope;7"), None);
+        assert_eq!(DesktopManager::parse_orphaned_marker("/scope;notnum;abc"), None);
+    }
 }

src/ui_interface.rs

@@ -902,8 +902,10 @@ pub fn get_async_job_status() -> String {
 #[inline]
 pub fn get_langs() -> String {
     use serde_json::json;
+    let hide_cjk = crate::lang::cjk_ui_unavailable();
     let mut x: Vec<(&str, String)> = crate::lang::LANGS
         .iter()
+        .filter(|a| !hide_cjk || !crate::lang::is_cjk_lang(a.0))
         .map(|a| (a.0, format!("{} ({})", a.1, a.0)))
         .collect();
     x.sort_by(|a, b| a.0.cmp(b.0));