[pulseaudio-discuss] [BUG?] I get a profile with 2 outputs, but if I mute headphone it mutes both ports

[Raymond Yau]

> >
> > > I suspect that the "Front" volume and mute elements can be used to
> > > control the line out without affecting the headphones. The problem is
> > > that PulseAudio's alsa configuration assumes that the "Front" element
> > > affects both line out and headphones (there's a comment saying that
"on
> > > some machines Front is actually a part of the Headphone path").
> > >
> > > /usr/share/pulseaudio/alsa-mixer/paths/analog-output-headphones.conf
> > > contains this:
> > >
> > >      [Element Front]
> > >      switch = mute
> > >      volume = zero
> > >
> > > If you change that to
> > >
> > >      [Element Front]
> > >      switch = off
> > >      volume = off
> > >
> > > does that fix the problem for you?
> > >
> >
> > Indeed this fixes my problem, thanks!
> >
> > I'm a bit confused by the comment in the .conf file though. So, despite
> > PA detecting the rear line out port exactly as it states, this "Element
> > Front" is actually part of the headphones "paths"? that is rear line out
> > is considered as part of "Element Front"?
>
> I'm not sure what you mean with your last question. The rear line out
> isn't a "part" of the "Front" mixer element, it's the other way around.
> You have two paths, headphones and line out. PulseAudio considers the
> "Front" mixer element to be part of both paths, even though on your
> machine it's only a part of the line out path.
>
> I'm not sure if we can fix this upstream. To me it would seem logical
> for the kernel to promise that "Front" only refers to line out, and if
> on some machine it also affects the headphone path, then that should be
> considered a kernel bug, and the kernel should rename the element.
> David, what do you think?
>

http://www.alsa-project.org/db/?f=d57c2c52e03841877dbb1dba005f9f1ebee43f58

Dell inspiron 660s desktop with alc662 codecs have three jacks at rear
panel which support surround 5.1 and front panel headphone

Headphone and line out share "Front Playback Volume"
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