Dual simulatenous output on single card not recognized

[Pierre-Louis Bossart]

On 11/30/21 1:44 AM, Eldred HABERT wrote:
> 
> On 29/11/2021 19:18, Pierre-Louis Bossart wrote:
>> 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.
> Sorry, I thought the output of `aplay -l` would be enough. The results
> are here;
> http://alsa-project.org/db/?f=bc64421df5181d1ba3bdf157c40d06dd52a7224b

ok, so you have a CNL-H chipset and no digital mics, so the legacy
HDaudio driver is used (not SOF w/ the DSP enabled).

There's nothing at the driver level that would prevent the use of
independent outputs, such as built-in speakers and HDMI concurrently.
You can verify this assertion by opening different terminals and trying

speaker-test -Dhw:0,0 -c2 -r48000

speaker-test -Dhw:0,3 -c2 -r48000 (use 0,7 8 9 10 as needed, depending
on which device is tagged as connected to a valid HDMI output in the
mixer 'Jack' status)

I am not sure though how the Gnome settings would let you do this. This
seems like a user-space problem to me?