Just to summarise today's thoughts.
There is one output volume control named "Speaker".
We can either fix this in the driver or in PulseAudio.
Driver: We have a generic problem of that the names picked for mixer
controls are in general *not* compliant with the standard volume control
names as specified in linux/Documentation/alsa/ControlNames.txt. We can
either try to fix the generic problem, or create a quirk for these
devices that changes the name.
PulseAudio: We have a generic problem in that PA disables hardware volume
control if one of the mixer paths does not have a volume control. In this case,
analog-output does not pick up "speaker" as a volume control, whereas
"analog-output-speaker" does.
* We can try to fix the generic problem by
- fix the original problem and see what bugs we'll suffer from if we don't
unify has_volume
- disabling the profiles without hw control instead of disabling hw volume
control.
...or we can create a quirk for this device by writing a PA profile set and a
matching udev rule.
One problem, five fixes to choose from. A difficult decision.
** Changed in: alsa-driver (Ubuntu)
Importance: Undecided => Medium
** Changed in: alsa-driver (Ubuntu)
Status: Triaged => In Progress
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[USB-Audio - Logitech H555 Headset] Mixer path with "Speaker" only
https://bugs.launchpad.net/bugs/671560
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