[pulseaudio-discuss] [PATCH 4/4] alsa-mixer: Add force-hw-volume flag to alsa profile sets

Colin Guthrie gmane at colin.guthr.ie
Sun May 15 07:02:16 PDT 2011

'Twas brillig, and Jyri Sarha at 11/04/11 10:19 did gyre and gimble:
> On Sat, 09 Apr 2011 20:20:40 +0200, David Henningsson
> <david.henningsson at canonical.com> wrote:
>> On 2011-04-08 17:18, Colin Guthrie wrote:
>>> 'Twas brillig, and oku at iki.fi at 08/04/11 15:18 did gyre and gimble:
>>>> From: Jyri Sarha<jyri.sarha at nokia.com>
>>>> Before this patch, if any of the paths in a path set do not
>>>> support HW volume then the HW volume is disabled for the whole
>>>> set. In some cases this is a bit drastic measure. For instance,
>>>> if all but one of the paths support HW volume and dB there no
>>>> problem to pretend that we have HW volume for the whole set. The
>>>> path without any mixers to control will just always return 0 dB
>>>> and the rest is handled by SW volume. This patch adds a flag to
>>>> the mapping section of profile set file to enables this behavior.
>>> David, this sounds similar to your USB Headset issue from a couple days
>>> ago... or am I just reading too much into the description?
>> Sort of - it just feels like neither of us has tried to do the right 
>> thing so far - I added a workaround/quirk for a few devices, and this 
>> patch adds a setting to turn something on and off.
>> I'd like it to "just work".
>> Or put in another way - what's the recommended default setting of this 
>> new parameter, and why?
> Target for my patch was to be non intrusive, but if you agree I can easily
> change my patch to always behave like force-hw-volume flag was set to true
> and remove the flag. It is even easier just to change the default for the 
> flag. 

David, what's you're thinking on Jyri's suggestion here?



Colin Guthrie

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