Re: [3.4-rc1][Regression][intel] Resume from suspend to disk hangs on restoring backlight state

On Wed, Apr 11, 2012 at 21:35, Maciej Rutecki maciej.rutecki@gmail.com wrote:

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Patch: http://cgit.freedesktop.org/~danvet/drm-intel/commit/?h=drm-intel-fixes &id= 55a254ac63a3ac1867d1501030e7fba69c7d4aeb

Please test whether this fixes your issue. You can also try adding i915.i915_enable_ppgtt=0 to your kernel cmdline.

Thanks, Daniel

Patch solves problem.

Now resume hangs later on another subsystem: wireless :D

Woot, I'm off the hook ;-) Thanks for reporting this issue and testing the patch.

Yours, Daniel

Seems be resolved in -rc2.

My guess is on the firmware load vs. suspend/resume fix that landed in -rc2. That one fixed resume on all the machines here, and -rc1 broke it on a lot of them. -Daniel