Radeon wakeup regression in 3.15-rc6

[Woody Suwalski]

Malte Schröder wrote:
> Hi,
> I just tried 3.15-rc6. I encountered a pretty nasty problem, which is
> after suspending to RAM the system doesn't wake up properly. v3.14 is fine.
> On wakeup all seems fine, i.e. hd starts to spin an USB-stuff wakes up.
> But all I get from the graphics card is a white screen slowly filling
> with random colored pixels. I had to hard reset the system.
>
> I attached the kernel log, the X-servers log, lspci-output and my kernel
> config.
>
> Regards
> Malte
I have seen a bit of a screen distortion at the bottom of LCD on Radeon 
after a wakeup.
I tried to re-run with drm.debug=0x0e, however once I did it - the 
problem has disappeared, and I have not been able to duplicate it again. 
So just watching for now.
OTOH I have seen (only one time) a black screen after wakeup on Nvidia. 
So maybe some timing is now exposed in PM / DRM...

Woody