I have MATE on my Ubuntu computer but I have a little and simple problem. I play games in fullscreen and when I press Ctrl+Spacebar it uncaptures the mouse. How can I disable this function of Ctrl+Spacebar?

2 Answers 2


Go to System > Control Center and, in the filter bar, type 'Keyboard Shortcuts'. Click on the resulting configuration tool to open a new window listing all your keyboard shortcuts. Find the 'Ctrl+Space' shortcut, select it, and hit backspace. The shortcut will now be disabled.

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    I don't see it there. Maybe it's just a feature that's made into MATE or something? Does ti happen to you, or is it just me?
    – John Scott
    Oct 15, 2014 at 13:12
  • Nothing happens when I press Ctrl + Space. This is kind of a long-shot but... are you running Ubuntu MATE virtually by any chance? (using Virtualbox or some other program?)
    – yam_head
    Oct 15, 2014 at 15:55
  • Nope. Not virtual. When you said it didn't do anything, did you have your mouse captured in something like a game? If you don't have it captured, it doesn't do anything.
    – John Scott
    Oct 15, 2014 at 16:35
  • I have found a solution! I am making it into an answer...
    – John Scott
    Oct 15, 2014 at 18:56
  • @FuzzyToothpaste Great!
    – yam_head
    Oct 15, 2014 at 21:32

I had Ctrl +Space set to "next input method" (whatever that means) in my IBus Preferences. It said space, so I took all that out and left it an empty field. The IBus Preferences is also called "Input Method" or "Keyboard Input Methods" in the MATE Control Center menus.

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