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List: linux-acpi
Subject: Re: Linux 3.11-rc2 (acpi backlight)
From: Kamal Mostafa <kamal () canonical ! com>
Date: 2013-07-23 18:46:29
Message-ID: 1374605189.31029.25.camel () fourier
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On Mon, 2013-07-22 at 21:54 +0200, Rafael J. Wysocki wrote:
> On Monday, July 22, 2013 11:11:54 AM Linus Torvalds wrote:
> > On Mon, Jul 22, 2013 at 6:02 AM, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> > >
> > > Linus, do you want me to send a pull request reverting 8c5bd7a and efaa14c?
> >
> > Yes, but [...] I'd suggest doing the revert just in time for
> > rc3, but waiting until then to gather info about people who see
> > breakage.
> >
> > Sound like a plan?
>
> Yes, it does.
>
> Rafael
Hi Rafael-
For your reference...
As James Hogan reported, those ACPI changes break backlight control on
the "Dell XPS13" Ivy Bridge models (the Sandy Bridge XPS13 model is not
affected).
I confirm that reverting 8c5bd7a and efaa14c fixes it again.
Also FYI...
On Mon, 2013-07-22 at 00:08 +0100, James Hogan wrote:
> Note that acpi_video0 only worked because I was applying "[PATCH]
> drm/i915: quirk no PCH_PWM_ENABLE for Dell XPS13 backlight" [1], so
> strictly speaking mainline already didn't work.
> [1] http://lkml.org/lkml/2013/7/19/748
That patch is now queued up in drm-intel/drm-intel-fixes, so should be
making its way to mainline soon.
-Kamal
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