https://bugs.freedesktop.org/show_bug.cgi?id=33515
--- Comment #1 from Michel Dänzer michel@daenzer.net 2011-01-26 01:27:48 PST --- (In reply to comment #1)
MESA: 7.10 with gallium and llvm enabled.
Does it also happen with the classic driver?
What card is it? (Maybe attach Xorg.0.log and dmesg)
Drm debug log only collected a bunch of garbage characters at the time when system locked up.
Maybe you can get more information with netconsole.