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

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On poniedziałek, 2 kwietnia 2012 o 21:05:23 Daniel Vetter wrote:
> On Mon, Apr 02, 2012 at 09:00:11PM +0200, Maciej Rutecki wrote:
> > On poniedziałek, 2 kwietnia 2012 o 19:54:02 Daniel Vetter wrote:
> > > On Mon, Apr 02, 2012 at 07:39:39PM +0200, Maciej Rutecki wrote:
> > > > Last known good: 3.3
> > > > Bad kernel: 3.4-rc1
> > > > Subsystem: power management/suspend/dri(intel)
> > > > 
> > > > When I resume from suspend to disk then system hangs on this screen:
> > > > http://mrutecki.pl/download/kernel/3.4-rc1/suspend_resume/DSC_5479.jp
> > > > g
> > > > 
> > > > It does not help SysRq keys. Only I can force power off by hold power
> > > > button.
> > > > 
> > > > Dmesg:
> > > > http://mrutecki.pl/download/kernel/3.4-rc1/suspend_resume/dmesg-3.4-r
> > > > c1.t xt
> > > > 
> > > > Config:
> > > > http://mrutecki.pl/download/kernel/3.4-rc1/suspend_resume/config-3.4.
> > > > 0-rc 1
> > > 
> > > Likely a known regression, ppgtt support broke hibernate because my
> > > code doesn't restore the ppgtt page directory correctly in the thaw
> > > function.
> > > 
> > > 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.

Thanks
-- 
Maciej Rutecki
http://www.mrutecki.pl
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