https://bugs.freedesktop.org/show_bug.cgi?id=68178
--- Comment #6 from nine@detonation.org --- It seems like I have two independent problems which may explain the confusing results I got:
* with DPM enabled I get hard locks on suspend and sometimes on resume. After suspend I have to turn off power manually but it seems like it successfully writes the suspend image to disk. On resume it sometimes locks with disabled output, sometimes it works.
* Regardless of DPM enabled or not I get X server crashes within minutes after a suspend/resume cycle. This happens with kernel 3.11.1 with current firmware. When I downgrade my kernel-firmware package to 20130114git-1.2.1, this problem vanishes. But the firmware may be the original cause. With the old firmware I for example do not have direct rendering or acceleration.
At least I found a logfile giving more information about the X server crash. Attaching.
Is there anything else I can do to debug these problems?