[Bug 282081] Re: X hangs and not recoverable after screen saving or logout/login with intel 965gm

[Sammy Spets]

I have the same issue on Intrepid with GM965/GL960 (X3100) hardware and
blank screen saver. I manage to get this bug happening when I lock the
screen.

Compiz appears to have problems when it switches desktops. That causes
compiz.real process to spin at 100% CPU. Although the symptoms of this
bug is X running consuming 100% CPU I think we need to eliminate compiz
as the cause. There is a desktop switch when the screensaver is switched
out. I've had the same symptoms occur when using rdesktop in full screen
mode and I go to switch back to windowed mode.

Another behaviour of compiz consuming 100% is ALT+SYSREQ (PRTSCR key)
successfully switches off raw keyboard mode in X. This allows a switch
to TTY1 using CTRL+ALT+F1. This is not possible when X is using 100%.

Since i've not found anyone else making progress with this bug i'll try to move things forward a little. Could you all report the following information:
 * Does ALT+PRTSCR enable tty switching for you (might need to use ALT+SYSREQ+R)? 
 * Does the bug occur with compiz disabled/uninstalled?

References for the compiz problems (just some of them):
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/176589
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/186058
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/285390

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X hangs and not recoverable after screen saving or logout/login with intel 965gm
https://bugs.launchpad.net/bugs/282081
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