Re: [ibm-acpi-devel] [PATCH] thinkpad-acpi: disable alsa volumemixer for SL410/SL510

From: Henrique de Moraes Holschuh
Date: Thu Oct 06 2011 - 14:12:27 EST

On Thu, 06 Oct 2011, Keng-Yü Lin wrote:
> On Thu, Mar 17, 2011 at 2:57 AM, Henrique de Moraes Holschuh
> <hmh@xxxxxxxxxx> wrote:
> > On Tue, 15 Mar 2011, Keng-Yu Lin wrote:
> >> The mute key on SL410/SL510 only works when the alsa volume mixer
> >> is not enabled. This patch makes the alsa volume mixer disabled
> >> on the matched SL410/SL510 EC versions.
> >
> > I'd like more data on this.  Is this some sort of weird interaction with
> > userspace, or does the firmware actually changes behaviour when we
> > enable the MUTE HKEY event in the event mask?
> The firmware does not change its behaviour with the key enabled in the keymask.
> The mute key (and the LED on it) of the two models works good without
> thinkpad_acpi loaded. So in the patch I like to exclude the volume
> control part for the two models.

If the firmware does not change behaviour, doesn't that mean the bug is

Is the firmware reporting these keys somewhere else (e.g. through the

"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
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