From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mike Galbraith <bitbucket@online.de>
Subject: Re: Linux 3.11-rc2 (acpi backlight)
Date: Wed, 24 Jul 2013 09:14:23 +0200
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To: James Hogan <james@albanarts.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>, Kamal Mostafa <kamal@canonical.com>, Steven Newbury <steve@snewbury.org.uk>, Martin Steigerwald <Martin@lichtvoll.de>, =?ISO-8859-1?Q?J=F6rg?= Otte <jrg.otte@gmail.com>, Linus Torvalds <torvalds@linux-foundation.org>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Matthew Garrett <matthew.garrett@nebula.com>, "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>, ACPI Devel Maling List <linux-acpi@vger.kernel.org>

On Wed, 2013-07-24 at 07:49 +0100, James Hogan wrote: 
> On 24 July 2013 01:05, Rafael J. Wysocki <rjw@sisk.pl> wrote:
> > I'd like to collect some information on the systems having problems with those
> > two commits (to see if they are similar somehow).
> >
> > It seems that one common symptom is that brightness cannot be controlled
> > through function keys.  Is that correct for all of you?  If so, did you try
> > any other way to control brightness, like a GUI-based?
> 
> For me both the Fn keys and the gui slider (kde) now control
> /sys/class/backlight/intel_backlight/brightness (which has no effect).
> Previously they both controlled the acpi one (that on -rc2 doesn't
> exist).

Hm, poking Fn keys make kde slider widget appear on my Toshiba Satellite
but do nada, never did, and I never looked into it, assumed there was no
canned functionality for my lappy, so use a setpci script instead.

Lappy has acpi_video0, which gui is twiddling, and does nothing, as does
toshiba, while intel_backlight works.

Suppose I should put latest/greatest kernel on the thing, maybe my Fn
keys will magically start turning the _right_ knob.

-Mike