From mboxrd@z Thu Jan  1 00:00:00 1970
From: Takashi Iwai <tiwai@suse.de>
Subject: Re: [alsa-devel] [PATCH] thinkpad-acpi: Enable microphone mute LED
Date: Fri, 03 Jun 2011 17:50:42 +0200
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To: Andrew Lutomirski <luto@mit.edu>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>, General PulseAudio Discussion <pulseaudio-discuss@mail.0pointer.de>, alsa-devel@alsa-project.org, ibm-acpi-devel@lists.sourceforge.net, Henrique de Moraes Holschuh <ibm-acpi@hmh.eng.br>, platform-driver-x86@vger.kernel.org

At Fri, 27 May 2011 14:22:26 -0400,
Andrew Lutomirski wrote:
>=20
> On Fri, May 27, 2011 at 12:48 PM, Matthew Garrett <mjg59@srcf.ucam.or=
g> wrote:
> > On Fri, May 27, 2011 at 12:39:10PM -0400, Andrew Lutomirski wrote:
> >
> >> I don't have docs so I don't really know. =C2=A0But the mute LED d=
oes not
> >> appear to be controllable from the LED interface and when mute is =
lit
> >> there's no sound regardless of what ALSA thinks. =C2=A0When I ligh=
t the
> >> micmute light, I can still record sound just fine.
> >>
> >> The mic mute button does nothing on Windows unless the special dri=
ver
> >> is installed, and that driver seems to mute the Windows mixer, so =
I
> >> think there's nothing special other than a little userspace helper
> >> going on.
> >
> > Hm. That makes things kind of tricky. While it's easy to just expos=
e the
> > LED, really we want to do it in such a way that userspace knows whi=
ch
> > LEDs it should be toggling while setting the microphone mute.
>=20
> One thought: call the thing laptop::micmute and teach userspace to
> look for an led with that name.
>=20
> Do any of the ALSA or PulseAudio people have any preferences?

I don't know of any machines but Thinkpad providing such a LED
control, so I'm fine with any naming basically :)  Though, if there
are many of such mute LEDs, any parseable form like laptop::xxx-mute
would be better for future?


thanks,

Takashi