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[Nilbus <693540@xxxxxxxxxxxxxxxxxx>]

I've been experiencing this since sometime after a 10.04 install. I did
a fresh install of 10.10 and updated, and I still have this problem.

OS: Ubuntu 10.10 64bit Desktop
Video card: 00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c)
Kernel: 2.6.35-24-generic
Running compiz

I also see "[mi] EQ overflowing. The server is probably stuck in an infinite loop" in my Xorg.0.log.old after a reboot.
I also can recover from the freeze killing X via SSH. X is always running at 100% CPU when the freeze occurs. Music still plays while X is frozen.

I cannot systematically reproduce this bug. It happens usually when I
use xrandr to switch from dual-head to single. These are the commands I
use:

Dual: xrandr --output LVDS1 --mode 1280x800 --output VGA1 --below LVDS1 --mode 1280x1024
Single: xrandr --output LVDS1 --mode 1280x800 --output VGA1 --off

When I run the Single script, my VGA1 monitor shuts off, and my LVDS1
laptop display freezes on an early frame in the compiz wobbly windows
animation where all the windows that were on the external monitor are
moving to the laptop display. The screen does not go black.

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https://bugs.launchpad.net/bugs/693540

Title:
  Xorg freeze on xrandr --auto