linux-kernel - Re: [PATCH] drm/i915: Fix inconsistent backlight level during disabled

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Date:	Thu, 17 Nov 2011 13:00:35 -0800
From:	Keith Packard <keithp@...thp.com>
To:	Takashi Iwai <tiwai@...e.de>
Cc:	intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Alex Davis <alex14641@...oo.com>,
	Kamal Mostafa <kamal@...onical.com>, mjg@...hat.com
Subject: Re: [PATCH] drm/i915: Fix inconsistent backlight level during disabled

On Wed, 16 Nov 2011 10:58:03 +0100, Takashi Iwai <tiwai@...e.de> wrote:

> When the brightness property is inquired while the backlight is disabled,
> the driver returns a wrong value (zero) because it probes the value after
> the backlight was turned off.  This caused a black screen even after the
> backlight is enabled again.  It should return the internal backlight_level
> instead, so that it won't be influenced by the backlight-enable state.

Yes, this looks correct by inspection to me. I'll stick it into
drm-intel-fixes.

-- 
keith.packard@...el.com

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