title: Ctrl+Space not working in Ubuntu 12.04.2 LTS
body: <p>I'm using Ubuntu 12.04.2 LTS (64bit) and the key combination Ctrl+Space is not working with my JIdea. I'm trying to use it for code completion in the IDE.</p>
  
  <p>There are no system shortcuts assigned to that. And JIdea keymap shows this shortcut for Code->Completion->Basic but I cannot even re-assign it to Ctrl+space. (I CAN change it to any other shortcut) </p>
  
  <p>Basically Ctrl+Space is a no-op in JIdea, but if I set the system shortcut to some other program, it works...</p>
  
  <p>Any suggestions?</p>