Re: Dual simulatenous output on single card not recognized

[Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>]

On 11/28/21 7:28 AM, Eldred HABERT wrote:
> Hello,
> 
> I bought a laptop with integrated sound output (either to speakers or
> headphones), and a HDMI output. Attached is the output of `aplay -l`.
> 
> Under both PipeWire and PulseAudio, I only get a single output/sink (by
> default to the built-in output), but I can get simultaneous output to both:
> - under PulseAudio, by adding a `load-module module-alsa-sink
> device=hw:0,7` line to the config;
> - under PipeWire, by adding a profile to the card to enable both
> outputs, which correctly provides two outputs that work fine concurrently.
> 
> I was directed to this mailing list after the following discussion:
> 
>> It's a kernel ALSA bug if SOF actually must contain enough data for
> the driver to figure this out (or at least pass that data on to
> userspace to deal with it)
>> if [we are] right that hardware itself does not contain the required
> data, then it can only be fixed in userspace via a card database
>> which is one thing to do, another would be maybe a heuristic rule that
> attempts to guess if such cards with analog and digital sub-devices
> might be independent
> 
> Please tell me if more details are needed—it would be nice if hardware
> configurations like mine could be fully supported out of the box ^^

You may want to run 'alsa-info' and provide a link to the uploaded
results. It's hard to comment without any information on 'hardware
configurations like mine'.
Thanks.