https://bugs.freedesktop.org/show_bug.cgi?id=81239
--- Comment #5 from Michel Dänzer michel@daenzer.net --- (In reply to comment #2)
(In reply to comment #1)
Please attach the Xorg.0.log file and the output of dmesg and glxinfo.
Unfortunately I was not able to reproduce this issue again. For being clear, it just happened once in the last two or three months.
Ugh, that makes it hard to do anything about the problem, or even confirm that it's fixed...
I am using awesome 3.4.15.
AFAICT awesome doesn't support compositing itself, so unless you're explicitly running a separate compositing manager, you're probably not using compositing.
So, assuming the problem is that the evolution process hangs, http://cgit.freedesktop.org/xorg/driver/xf86-video-ati/commit/?id=c4ae0e2cbc... might help.
Or it might not be related to the graphics stack at all.