https://bugzilla.kernel.org/show_bug.cgi?id=119991
Bug ID: 119991 Summary: Screen is corrupt upon resume from hybrid-sleep with Radeon HD5xxx cards Product: Drivers Version: 2.5 Kernel Version: 4.6.1 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Video(DRI - non Intel) Assignee: drivers_video-dri@kernel-bugs.osdl.org Reporter: j.markus.maunus@gmail.com Regression: No
When resuming from hybrid-sleep, the screen is blank/corrupt (usually white-ish, resembling static with some random colours, but sometimes black or a pattern of black/white boxes) and the GUI is essentially unusable as nothing is visible. The system is still responsive, however; I can switch to/from virtual consoles without issue (and ssh into the box).
I can reproduce this every time, but only on resume from hybrid sleep - normal suspend works fine, as does hibernate. In fact, after resuming from hybrid sleep I can "fix" the corruption by hibernating the system, and then resuming - some corruption remains, but is quickly cleared by doing something simple such as alt-tabbing or moving/resizing the topmost window, and the system appears to work normally.
This does not happen with my HD 4670, but does appear with HD 5750 and HD 5850.
A possibly related symptom: sometimes both hibernate and hybrid-sleep take extraordinarily long (hard disks spin down normally, but the system remains powered and fans running for considerable time, anywhere from ~10 seconds to several minutes after the disks have stopped). This happens with both 5-series cards as well, but not on the 4670. However, I have had this happen even on kernels which do not exhibit screen corruption after resume from hybrid sleep, and can't consistently reproduce it.
I did a git bisect on Linus' tree and the first bad commit is b9729b17a414f99c61f4db9ac9f9ed987fa0cbfe