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

David Henningsson david.henningsson at canonical.com
Sun May 15 23:43:33 PDT 2011

On 2011-05-15 16:02, Colin Guthrie wrote:
> '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?

Not 100% sure on this one, what would be the reason why we would want 
the old behaviour?

David Henningsson, Canonical Ltd.

More information about the pulseaudio-discuss mailing list