Comment 329 for bug 889706

Almost forgot to post... so:

I'm using linux mint 13 with cinnamon, and I get a similar error like you guys, mostly it's "just" a trap int 3, but a bit rarely it's a segfault.

Cinnamon likes "flickering" without any trace in the dmesg or elsewhere, this mostly happens when I open new windows (e.g. Skype), when there's a trace:
60% of the time I get a trap int 3 and Cinnamon restarts itself (Every cinnamon related interface disappears, all windows are visible on top of each other, then only the background is visible, and then everything's back to normal, just like when you [alt+f2] [r] [enter] (what is it called? :)).)
25% of the time I get a trap int 3 and I have to manually restart it from tty
15% of the time I get a segfault and I have to manually restart it from tty

When I restart it from tty I use these commands after laggi^Wlogging in:
export DISPLAY=:0.0; cinnamon --replace

The newest related lines from dmesg:

Just "flickering":
[ 2822.840995] cinnamon[1711] trap int3 ip:7f29cf23afdb sp:7fffa7ff82c0 error:0

Had to restart this one from tty (I don't know if the restart caused these lines, or the crash, and these lines are always identical):
[ 6551.753348] Assertion failed in ../../../../../../../../drivers/2d/lnx/fgl/drm/kernel/hal_r6xx.c at line: 79
[ 6551.760547] Assertion failed in ../../../../../../../../drivers/2d/lnx/fgl/drm/kernel/hal_r6xx.c at line: 79
[ 6551.767633] Assertion failed in ../../../../../../../../drivers/2d/lnx/fgl/drm/kernel/hal_r6xx.c at line: 79
[ 6551.774692] Assertion failed in ../../../../../../../../drivers/2d/lnx/fgl/drm/kernel/hal_r6xx.c at line: 79
[ 6551.781278] Assertion failed in ../../../../../../../../drivers/2d/lnx/fgl/drm/kernel/hal_r6xx.c at line: 79
[ 6551.788288] Assertion failed in ../../../../../../../../drivers/2d/lnx/fgl/drm/kernel/hal_r6xx.c at line: 79
[ 6551.795600] Assertion failed in ../../../../../../../../drivers/2d/lnx/fgl/drm/kernel/hal_r6xx.c at line: 79
[ 6551.803065] Assertion failed in ../../../../../../../../drivers/2d/lnx/fgl/drm/kernel/hal_r6xx.c at line: 79

I have a Gigabyte (ATI) HD4850 graphics card.

I don't know if it's a related problem, but sometimes I get something that looks like a dead lock in the kernel during shutdown. Something like "unable to handle kernel paging request at [address]", some stack traces, and also watchdog errors, and a lock on CPU0. If I shutdown using "sudo shutdown -h now" it happens only 10% of the time, but when I use the GUI button it happens almost every time...