From mboxrd@z Thu Jan  1 00:00:00 1970
From: Daniel Vetter <daniel@ffwll.ch>
Subject: Re: [PATCH v2] drm/i915: Fix eDP blank screen after S3
 resume on HP desktops
Date: Fri, 22 Jun 2012 23:56:29 +0200
Message-ID: <20120622215629.GC4931@phenom.ffwll.local>
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To: Takashi Iwai <tiwai@suse.de>
Cc: intel-gfx@lists.freedesktop.org, John Sundragon Waitz <john.waitz@hp.com>, Rodrigo Vivi <rodrigo.vivi@intel.com>
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On Thu, Jun 21, 2012 at 03:30:41PM +0200, Takashi Iwai wrote:
> This patch fixes the problem on some HP desktop machines with eDP
> which give blank screens after S3 resume.
> 
> It turned out that BLC_PWM_CPU_CTL must be written after
> BLC_PWM_CPU_CTL2.  Otherwise it doesn't take effect on these
> SNB machines.
> 
> Tested with 3.5-rc3 kernel.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=49233
> 
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Picked up for -fixes, thanks for the patch.
-Daniel
-- 
Daniel Vetter
Mail: daniel@ffwll.ch
Mobile: +41 (0)79 365 57 48