[alsa-devel] HD-audio regression after commit 34588709af61be1550b4e2bcee5c85d0ac4f34d4

[Takashi Iwai]

At Tue, 22 Jan 2013 05:06:33 -0500,
Miro Hodak wrote:
> 
> On Tue, Jan 22, 2013 at 3:58 AM, Takashi Iwai <tiwai at suse.de> wrote:
> 
> > At Tue, 22 Jan 2013 03:14:10 -0500,
> > Miro Hodak wrote:
> > >
> > > On Tue, Jan 22, 2013 at 2:05 AM, Takashi Iwai <tiwai at suse.de> wrote:
> > >
> > > > At Mon, 21 Jan 2013 21:21:45 +0100,
> > > > Takashi Iwai wrote:
> > > >
> > >
> > >
> > > > The patch is below, already merged in test/hda-gen-parser branch (and
> > > > test/hda-migrate and master branch, too), as usual.
> > > >
> > > >
> > > > Takashi
> > > >
> > > > ---
> > > > From: Takashi Iwai <tiwai at suse.de>
> > > > Subject: [PATCH] ALSA: hda - Disable HP auto-mute during independent HP
> > > > mode
> > > >
> > > > Both the HP auto-mute and the independent HP mode conflict with each
> > > > other.  Make HP auto-mute disabled (only for the affected HP jack)
> > > > during the driver is in HP independent mode.
> > > >
> > > > How is this supposed to work? I upgraded my kernel, and with
> > Independent
> > > HP on Auto-Mute can still be switched on or off in alsamixer.
> >
> > The Auto-mute mode enum mixer is still accessible but it doesn't
> > affect the automute behavior of the HP jack itself.  The HP jack is
> > excluded from the automute source during the independent HP mode.
> >
> >
> > Takashi
> >
> 
> Is there a reason to do it this way? It must confusing to users if the
> option can be changed but it has no effects. For example, Independent HP
> cannot be changed while sound is being played.

The auto-mute option isn't only for one headphone.  If you have an
extra line-out in addition to built-in speaker, it's still working
even if one headphone jack isn't used.  Ditto for the case with
multiple headphones.  The independent HP mode influences only on the
first HP jack.


Takashi