Ubuntu22.04远程桌面下VS Code终端无法输入反斜杠求助

问题详情 #

• 环境：通过Windows远程桌面连接新安装的Ubuntu 22.04系统，已配置VS Code
• 症状：
  • VS Code内置终端无法输入反斜杠（德语键盘快捷键为Alt Gr + ß），但VS Code的设置、文本编辑器等区域可正常输入
  • 其他三级字符（如{[]}）在终端及所有窗口均能正常输入
  • 外部bash终端也出现同样的反斜杠输入问题
• 已尝试操作：
  • 测试过GitHub、Stack Overflow上的相关解决方案，无效
  • 检查所有相关键盘快捷键，未发现异常
  • 对比配置完全相同的Ubuntu 22.04虚拟机（配置从GitHub导出），该虚拟机无此问题

VS Code键盘快捷键排查日志 #

# first pressing ctrl + shift + P to open Keyboard Shortcut Troubleshooting, then pressing Alt Gr + ß for backslash
2023-07-24 16:22:26.824 [info] [KeybindingService]: / Soft dispatching keyboard event
2023-07-24 16:22:26.825 [info] [KeybindingService]: \ Keyboard event cannot be dispatched
2023-07-24 16:22:26.825 [info] [KeybindingService]: / Received  keydown event - modifiers: [ctrl], code: ControlLeft, keyCode: 17, key: Control
2023-07-24 16:22:26.826 [info] [KeybindingService]: | Converted keydown event - modifiers: [ctrl], code: ControlLeft, keyCode: 5 ('Ctrl')
2023-07-24 16:22:26.826 [info] [KeybindingService]: \ Keyboard event cannot be dispatched in keydown phase.
2023-07-24 16:22:27.232 [info] [KeybindingService]: / Soft dispatching keyboard event
2023-07-24 16:22:27.233 [info] [KeybindingService]: \ Keyboard event cannot be dispatched
2023-07-24 16:22:27.233 [info] [KeybindingService]: / Received  keydown event - modifiers: [ctrl,shift], code: ShiftLeft, keyCode: 16, key: Shift
2023-07-24 16:22:27.234 [info] [KeybindingService]: | Converted keydown event - modifiers: [ctrl,shift], code: ShiftLeft, keyCode: 4 ('Shift')
2023-07-24 16:22:27.234 [info] [KeybindingService]: \ Keyboard event cannot be dispatched in keydown phase.
2023-07-24 16:22:27.518 [info] [KeybindingService]: / Soft dispatching keyboard event
2023-07-24 16:22:27.519 [info] [KeybindingService]: | Resolving ctrl+shift+P
2023-07-24 16:22:27.519 [info] [KeybindingService]: \ From 2 keybinding entries, matched workbench.action.showCommands, when: no when condition, source: built-in.
2023-07-24 16:22:27.519 [info] [KeybindingService]: / Received  keydown event - modifiers: [ctrl,shift], code: KeyP, keyCode: 80, key: P
2023-07-24 16:22:27.519 [info] [KeybindingService]: | Converted keydown event - modifiers: [ctrl,shift], code: KeyP, keyCode: 46 ('P')
2023-07-24 16:22:27.520 [info] [KeybindingService]: | Resolving ctrl+shift+P
2023-07-24 16:22:27.520 [info] [KeybindingService]: \ From 2 keybinding entries, matched workbench.action.showCommands, when: no when condition, source: built-in.
2023-07-24 16:22:27.520 [info] [KeybindingService]: + Invoking command workbench.action.showCommands.
2023-07-24 16:22:28.198 [info] [KeybindingService]: + Ignoring single modifier shift due to it being pressed together with other keys.
# Here starts the backslash part
2023-07-24 16:23:05.481 [info] [KeybindingService]: / Soft dispatching keyboard event
2023-07-24 16:23:05.482 [info] [KeybindingService]: \ Keyboard event cannot be dispatched
2023-07-24 16:23:05.482 [info] [KeybindingService]: / Received  keydown event - modifiers: [], code: ArrowLeft, keyCode: 225, key: AltGraph
2023-07-24 16:23:05.482 [info] [KeybindingService]: | Converted keydown event - modifiers: [], code: ArrowLeft, keyCode: 0 ('unknown')
2023-07-24 16:23:05.482 [info] [KeybindingService]: \ Keyboard event cannot be dispatched in keydown phase.
2023-07-24 16:23:05.695 [info] [KeybindingService]: / Soft dispatching keyboard event
2023-07-24 16:23:05.695 [info] [KeybindingService]: | Resolving [
2023-07-24 16:23:05.710 [info] [KeybindingService]: \ No keybinding entries.
# in the next line you can see that the \ key is indeed recognized
2023-07-24 16:23:05.710 [info] [KeybindingService]: / Received  keydown event - modifiers: [], code: Minus, keyCode: 219, key: \
2023-07-24 16:23:05.710 [info] [KeybindingService]: | Converted keydown event - modifiers: [], code: Minus, keyCode: 92 ('[')
2023-07-24 16:23:05.710 [info] [KeybindingService]: | Resolving [
2023-07-24 16:23:05.711 [info] [KeybindingService]: \ No keybinding entries.
# only pressing ß
2023-07-24 16:25:49.559 [info] [KeybindingService]: / Soft dispatching keyboard event
2023-07-24 16:25:49.626 [info] [KeybindingService]: | Resolving [
2023-07-24 16:25:49.626 [info] [KeybindingService]: \ No keybinding entries.
2023-07-24 16:25:49.626 [info] [KeybindingService]: / Received  keydown event - modifiers: [], code: Minus, keyCode: 219, key: ß
2023-07-24 16:25:49.626 [info] [KeybindingService]: | Converted keydown event - modifiers: [], code: Minus, keyCode: 92 ('[')
2023-07-24 16:25:49.626 [info] [KeybindingService]: | Resolving [
2023-07-24 16:25:49.626 [info] [KeybindingService]: \ No keybinding entries.

解决思路 #

• 调整Windows端RDP键盘设置：
  • 打开远程桌面连接的“显示选项”→“本地资源”，将“键盘”选项设为“在此计算机上”，避免远程端拦截按键；同时启用“应用Windows组合键”选项。
• 修复Ubuntu端键盘布局配置：
  • 进入系统设置→“键盘”→“布局”，重新添加德语键盘布局并设为默认；检查“快捷键”中是否有占用Alt Gr + ß的自定义绑定。
  • 执行setxkbmap -print -verbose 10查看当前键盘映射，若异常则手动指定布局：setxkbmap de。
• 排查终端配置干扰：
  • 重命名bash的~/.inputrc文件（mv ~/.inputrc ~/.inputrc.bak），重启终端测试是否有自定义绑定干扰。
  • 在VS Code设置中，将terminal.integrated.gpuAcceleration设为off；检查terminal.integrated.keybindingsOverride是否覆盖了反斜杠输入。
• 更新并配置xrdp服务：
  • 执行sudo apt update && sudo apt upgrade xrdp更新xrdp到最新版本。
  • 修改/etc/xrdp/xrdp.ini，添加或修改以下配置后重启服务（sudo systemctl restart xrdp）：

    keyboard_type=4
    keyboard_layout=de
    

内容的提问来源于stack exchange，提问作者Robert