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[Bug 800222] [NEW] Intermittent freeze - UI won't respond to clicks or keypresses


Public bug reported:

Binary package hint: compiz

On an older Samsung desktop at work (running Natty), I get occasional
freezes. During the freeze, I can move the mouse pointer normally, but
the system doesn't respond to mouse clicks. Also, keyboard input is
ignored except for the key combos to drop to a console. The screen isn't
updated; for example, the clock appears frozen, etc. These freezes
almost always happen after the machine has been sitting idle for a
while. It's possible that the screensaver (blank screen) aggravates the
problem, but I can't prove that it does.

To recover, I have to send kill -9 to the compiz process and let it get
respawned. Nicer signals (15, 1, 2) don't have any apparent effect.

Since this isn't a crash, I don't think I can get apport traces, and
since I can't predict when the freeze will occur, it's difficult to get
other real-time info. I don't really know what kind of additional info
would be useful in this report. I'll be glad to attempt to supply any
requested info, though.

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: New

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  Intermittent freeze - UI won't respond to clicks or keypresses

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