Certain reserved key combinations silently fail when used as shortcuts.
This issue was created as a result of gnome-settings-daemon#431 (closed)
VERSION: GNOME Control Center 3.32.2
Attempting to set Ctrl-Alt-{Left,Right} as a keyboard shortcut appears to work, but silently fails because those keys are reserved by the window manager. The action taken by the window manager for those keys (workspace switching right/left) is not visible in the UI, and so it is not possible to change those shortcuts except by using dconf directly.
Because those shortcuts are not visible in the UI, the user is not warned that they are reserved, and GNOME Control Center allows the user to set those key combinations to another action, which then silently fails.
Steps to reproduce:
- Open GNOME Settings
- Navigate to Devices > Keyboard > Keyboard Shortcuts
- Select an action (e.g. Previous Track under Sound and Media)
- Assign Ctrl-Alt-Left or Ctrl-Alt-Right to that action.
- Attempt to use that key combination to effect that action.
- Observe that the assigned action is not taken, but no warning was produced when assigning that key combination to that action.