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Ctrl+Space doesn’t work in NetBeans [Ubuntu 12.04] [Solved]

I reinstalled Ubuntu on my laptop recently. Now I am using Ubuntu 12.04 LTS with Gnome 3 environment. Everything worked fine except one problem: the hot key Ctrl+Space (auto code completion) stopped working in Netbeans and other IDE. Of course, there was an alternative key combination Ctrl+’\’, but it is absolutely inconvenient! I’d prefer to kill myself looking for the solution on the Internet rather than to give in and use Ctrl+’\’. I’ve surfed the net for a while and found a solution to my problem!

The key combination didn’t work because some other program used it. To fix this I used gconf-editor.

  1. Open gconf-editor.
  2. Choose desktop -> ibus -> general -> hotkey.
  3. Open trigger parameter.
  4. Remove Ctrl+Space key combination from the list and press OK.

Now we can use Ctrl+Space without any problems. Let me know if you have any problems or/and better ideas. Good luck!
UPD: I returned to Ubuntu 11.10, cuz’ 12.04 turned out to be a total rubbish. I’m just wondering if Ubuntu 12.10 is any better…