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I don't have any more clues , unfortunately

Every time i force a logout (control-alt-backspace i mean) and login again, a random process uses 100% of a cpu core, usually compiz or nautilus

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closed as too localized by Marco Ceppi May 23 '11 at 1:32

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What causes you to kill the x-server to begin with? –  wojox May 12 '11 at 20:22
    
Usually it's an application that won't quit not matter what or compiz messing the places i can click with those i cannot. (lately just the second one because i have xkill in a shortcut since some days ago for those applications that won't quit) –  Chriskin May 12 '11 at 20:43
    
Does the CPU usage problem still occur even if you kill the X server before no other problems have arisen? –  ændrük May 12 '11 at 20:59
    
Let's try - i haven't tried that at all –  Chriskin May 12 '11 at 21:03
    
I just tried it - there is no problem in such a case, no. –  Chriskin May 12 '11 at 21:05

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