[pulseaudio-discuss] [PATCH] alsa-mixer: Allow speaker port to control "Front Speaker"

[David Henningsson]

On 01/19/2012 01:14 PM, Colin Guthrie wrote:
> 'Twas brillig, and David Henningsson at 13/01/12 08:49 did gyre and gimble:
>> On 2012-01-12 20:44, Colin Guthrie wrote:
>>> 'Twas brillig, and David Henningsson at 12/01/12 09:58 did gyre and
>>> gimble:
>>>> "Front Speaker", "Surround Speaker" seems to be a common enough name
>>>> to make it into alsa-utils, so we should probably care about it as
>>>> well. In this case, there was a macbook pro whose speakers didn't work
>>>> without these controls.
>>>
>>>
>>> Seams reasonable.
>>
>> Committed?
>
> It is now in my tree will push later tonight with your other patch.
> Sorry for my tardiness. I really suck of late, but trying to get head
> into it again :D

No worries. Let me know if I push you too hard. :-)

>>> On a related note, have you ever come across a "Master Front" on your
>>> travels?
>>>
>>> To me it doesn't make much sense (was is "Master Front" that isn't
>>> covered by "Front"?). Perhaps it's just a mislabelled "Master" - don't
>>> suppose you remember fixing or seeing a fix for this?
>>>
>>> https://bugs.mageia.org/show_bug.cgi?id=2119
>>
>> Yes. The question is about what name controls the Front channel of the
>> Line-Out port but not the Speaker/HP, and what name controls the Front
>> channel of all those outputs (but still not Surround).
>>
>> If I understand Takashi right, he wants "Front" to control all three of
>> them, whereas "Front Line-Out" would control only the first one. The
>> reality is that "Master Front" controls all three, the behaviour of
>> "Front" is inconsistent, and "Front Line-Out" does not exist.
>>
>> We've distro patched "Master Front", but if my memory does not fail me
>> you chose not to upstream it when we went through the Ubuntu patches
>> together at the Desktop Summit.
>
> Hmm, right. Your memory is likely better than mine. I'll take another
> look at that one - tho' I guess it should still be fixed at the alsa level.
>
> OK, another mixer question now I've got you listening :D
>
> https://bugs.mageia.org/show_bug.cgi?id=212
> https://bugs.mageia.org/attachment.cgi?id=1204 (alsa-info)
>
> This has three "Master" controls (0-2). I'm not really sure what this
> means! Can you shed some light on it (is it just something that is
> better quirked in newer kernels?)

Having three masters is all terribly wrong, and hopefully it has been 
fixed since 2.6.38.

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