[pulseaudio-discuss] [PATCH] Alsa: Correct port availability with multiple jacks

[Raymond Yau]

> > > My personal use-case is Dock headphone jack vs. built-in headphone
jack,
> > > but in principle the same could happen with Front headphone jack vs
> > > headphone jack (dunno if those can exist in practise).
> > >
> >
> > There are two cases which headphone jack won't mute the other headphone
> > jack when they are at same location
> > 1) dual headphone notebook (e.g. Dell XPS series)
> >
> >
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda?id=8af3aeb498197f6fdf5acc913ffe8a392cb921c9
>
> Right X220 + dock falls into the case above, there is a headphone jack
> on the dock and one on the machine itself. Note that the dock headphone
> jack is setup by a pin fixup in the kernel.
>
>

The main difference is only those dual headphone jacks notebook support 4
channels playback but your
case cannot since headphone and dock headphone share same dac and volume
and speaker is muted when you plug any headphone

Can you select surround40 profile?
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