[Intel-gfx] i915 PCH backlight vs. Dell XPS13

[Kamal Mostafa]

On Fri, Feb 8, 2013 at 8:36 PM, Kamal Mostafa <kamal at canonical.com> wrote:
> > Daniel's backlight fixes which landed in 3.6 did enable working
> > backlight controls on the XPS13, but it appears that this commit from
> > Paolo broke it again:
> >         a4f32fc drm/i915: don't forget the PCH backlight registers

On Fri, 2013-02-08 at 20:55 +0100, Daniel Vetter wrote:
> You might want to try the latest drm-intel-nightly git branch from
> http://cgit.freedesktop.org/~danvet/drm-intel This has a few more
> tricks which helped on some similar platforsm to yours (and similar
> resume issues).


Yes indeed, this commit from drm-intel-nightly does fix the problem:
"drm/i915: write backlight harder".

Thanks as always, for your help Daniel!

 -Kamal

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