How do I disable Ctrl+Alt+Left/Right?

I use GNOME Classic. There is no Ctrl+Alt+Left/Right shortcut in System Settings -> Keyboard -> Shortcuts.

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It should be configured somewhere else. But where?


Remove the default keybinding using the following commands

 gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-left "['']"
 gsettings set org.gnome.desktop.wm.keybindings switch-to-workspace-right "['']"

In my system, those configs are available in System Settings -> Keyboard. Please double-check.

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If those aren't available, you can try add them with gconf-editor. If you use Metacity, simply go to /apps/metacity/global_keybindings and add the corresponding values:

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If you use Compiz, you can follow the steps provided by @ams


CompizConfig Setting Manager (it's not installed by default though).

Then go to "Desktop Wall Plugin", and it's on the "Bindings" tab.

That's assuming you are using Unity (full 3D), or (edit) Gnome with effects enabled.