linux-kernel - Re: [PATCH] i915: Quirk out disconnected backlight

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Message-ID: <1347632954.21322.44.camel@shinybook.infradead.org>
Date:	Fri, 14 Sep 2012 15:29:14 +0100
From:	David Woodhouse <dwmw2@...radead.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Grant Likely <grant.likely@...retlab.ca>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	David Airlie <airlied@...ux.ie>
Subject: Re: [PATCH] i915: Quirk out disconnected backlight

On Fri, 2012-09-14 at 14:48 +0100, Matthew Garrett wrote:
> On Fri, Sep 14, 2012 at 01:57:06PM +0100, Grant Likely wrote:
> 
> > Tested on MacbookPro8,3. Without this patch both the intel_backlight and
> > gmux_backlight devices get registered and userspace doesn't know which
> > it should use.
> 
> Userspace should be figuring out which one to use from the type field.

It only does that if it's using gsd-backlight-helper to poke
at /sys/class/backlight directly. If X exposes a backlight, (as it does
for the Intel backlight), then gsd will just use that.

-- 
dwmw2

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