https://bugs.freedesktop.org/show_bug.cgi?id=60439
--- Comment #4 from Harald Judt h.judt@gmx.at --- I will bisect the week after the next, before I will not have access to that machine. I'd rather avoid bisecting standby/resume problems too much because that could possibly cause data loss, and it is not possible to do in a VM.
BTW: I do not have such issues on a laptop with a ATI RV620 [Mobility Radeon HD 3400 Series], so this only seems to affect cayman.