https://bugs.freedesktop.org/show_bug.cgi?id=68178
--- Comment #5 from nine@detonation.org --- (In reply to comment #4)
Sounds like this may be a problem independent of dpm. Have you ever had successful suspend and resume?
I've always (meaning > 5 years) had successful suspend and resume on this machine. Until I updated the firmware files to test UVD and then dpm. With the original firmware contained in openSUSE's kernel-firmware-20130114git-1.2.1 package, suspend/resume works just fine. I started having problems immediately after updating the radeon firmware files from your FTP site. In the meantime, openSUSE shipped an update to the kernel-firmware package with which I see the same problems.
When you say X crash, do you you mean X hangs? system hangs? segfault?
I mean the X server terminated unexpectedly and I got thrown back to the login screen. Other than this message and the part about GPU lockup in the dmesg dump I posted, I could not find any messages.