Xorg freezes often with 100% CPU

[realdarkman]

Hi all,

is there any solution, workaround or fix for the Xorg freeze bug?

Description:
Xorg freezes often (CPU 100%), no mouse (or mouse very slow), no keyboard, cold reboot required!

System: ArchLinux i686, 32bit
Current packages: kernel 3.3.3-1-ARCH, Xorg 1.12.1-1, gnome 3.4.1-1, nvidia 295.33-2 (downgrade from 295.40)

AMD Phenom II X4 975, Gigabyte 870A-UD3 rev. 3.1, 4GB Ram, GeForce 8800GTS 512

/var/log/Xorg.0.log:

[ 5797.032] [mi] EQ overflowing. Additional events will be discarded until existing events are processed.
[ 5797.032]
[ 5797.032] Backtrace:
[ 5797.049] 0: /usr/bin/Xorg (xorg_backtrace+0x49) [0x81b6bb9]
[ 5797.050] 1: /usr/bin/Xorg (mieqEnqueue+0x223) [0x8195503]
[ 5797.050] 2: /usr/bin/Xorg (0x8048000+0x43df5) [0x808bdf5]
[ 5797.050] 3: /usr/bin/Xorg (xf86PostMotionEventM+0xf9) [0x80c5699]
[ 5797.050] 4: /usr/lib/xorg/modules/input/evdev_drv.so (0xb4460000+0x33dd) [0xb44633dd]
[ 5797.050] 5: /usr/lib/xorg/modules/input/evdev_drv.so (0xb4460000+0x481c) [0xb446481c]
[ 5797.050] 6: /usr/bin/Xorg (0x8048000+0x6cfd1) [0x80b4fd1]
[ 5797.050] 7: /usr/bin/Xorg (0x8048000+0x92a05) [0x80daa05]
[ 5797.050] 8: (vdso) (__kernel_sigreturn+0x0) [0xb77bd400]
[ 5797.050] 9: /usr/lib/xorg/modules/drivers/nvidia_drv.so (0xb4a61000+0x61f06) [0xb4ac2f06]
[ 5797.050]
[ 5797.050] [mi] These backtraces from mieqEnqueue may point to a culprit higher up the stack.
[ 5797.050] [mi] mieq is *NOT* the cause. It is a victim.

Freezes again today, Xorg CPU 100%, nothing works, no mouse, no keyboard! Cold reboot required! Cannot find any errors in logs!

Up to three freezes a day! This sucks! Any hints, workarounds, tips/tricks?

Thanks!
Chris