[alsa-devel] Shared volume control again

[David Henningsson]

On 2014-10-29 18:17, Takashi Iwai wrote:
> At Wed, 29 Oct 2014 18:12:14 +0100,
> David Henningsson wrote:
>>
>>
>>
>> On 2014-10-29 18:02, Takashi Iwai wrote:
>>> Hi,
>>>
>>> thinking of the problem about shared volume controls again, I stumbled
>>> on a case where your suggested solution doesn't work well.  Namely,
>>> when a headphone volume is shared for two headphones (one on the
>>> laptop and one on the dock), how should it be named?  One is
>>> "Headphone" and another is "Dock Headphone".  That's a bit tricky.
>>>
>>> So, in the end, we need the mapping representation somehow more
>>> explicitly than the control name.
>>>
>>> Thoughts?
>>
>> In practice, it seems like we more often than not share DAC for all
>> headphones. Also it is very common today that a jack called "Front
>> Headphone" has a volume control called only "Headphone".
>>
>> That's the status quo. As a result we have only one headphone path in
>> PulseAudio for all types of headphones.
>
> OK, so "Headphone" volume should be handled by both "Headphone Jack"
> and "Dock Headphone Jack" detections?  Then it's fine.  I thought this
> wasn't the case (from my memory dealing with an old bug report).

Yes. The "Dock Headphone Jack" name was added quite recently though, so 
it's only in git master right now.

-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic