[pulseaudio-discuss] [UCM] usage howto

[Soeren Grunewald]

On 01/09/2013 05:29 AM, Arun Raghavan wrote:
> On Mon, 2013-01-07 at 11:46 +0100, Soeren Grunewald wrote:
>> Hi All,
>>
>> I've been testing pulseaudio-3.0 and now I have some questions. Is there
>> any updated documentation available describing the usage of UCM in
>> pulsaudio and can the current UCM implementation handle multiple
>> soundcards? I plan to use two or three soundcards (all having there own
>> UCM configuration) and I'd like to use them with "module-loopback".
>>
>>
>> During testing I also run into some issues. With my current
>> configuration [1], I get a double-free, due missing modifiers. I solved
>> this with the attached patch [2]. But then I hit the assertation in file
>> src/modules/alsa/alsa-ucm.c function ucm_get_device_property:250
>>
>>       pa_assert(device->playback_channels || device->capture_channels);
>>
>> I assume that this is the result of some missing entries in the UCM
>> config, but I can't see my issue.
>
> I'm given to understand that every device must have PlaybackChannels or
> CaptureChannels defined.
>
> -- Arun
>

Thank you for your comment. Tanu already told me that on IRC, he also 
told me that there is already a bug [1] opened for this issue.
--
Regards,
Soeren

[1] https://bugs.freedesktop.org/show_bug.cgi?id=53036