[Intel-gfx] Breaking suspend/resume by the Pipe A quirk

[Daniel Vetter]

On Thu, May 29, 2014 at 11:19:47PM +0200, Thomas Richter wrote:
> Hi Daniel, hi folks,
> 
> according to my knowledge, the pipe A quirk is unconditionally enabled on
> the 830 to allow resume to work properly. Unfortunately, it does quite the
> opposite on the S6010, it breaks resume completely.
> 
> If the pipe A quirk is disabled, then the boot console works correctly.
> Resume does not, the display is dead, but it is possible to remotely connect
> to the machine, from there POST the video card (via vbetool post), stop X,
> then restart X, then the display is back.
> 
> If the pipe A quirk is enabled, then try to resume from suspend, then the
> machine is dead completely. You can ping it, but not log in. I currently
> have not yet tried to figure out where it hangs, but I would suspect the
> problem is somewhere in the i915 kernel module. The display
> just stays black.
> 
> Thus, in addition to the watermark fix I proposed, please *disable* the
> unconditional pipe A quirk for the 830GM since it really breaks things, not
> only the boot console.

Can you go right ahead and please submit this as a patch?

Thanks, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch