Dear Peter,

Am 14.07.22 um 00:12 schrieb Peter F. Patel-Schneider:
I have an Ice Lake laptop with 3 8-channel HDMI outputs.  My kernel
appears to have the appropriate modules loaded for the card, including
snd_hda_codec_hdmi.  Here is the information for one of the channels
from /proc/asound/card0/codec#2.


But as far as I can tell ALSA is turning them into 2-channel outputs.
At least I can not see any surround channels in alsamixer and I can
only play 2-channel sound to them using speaker-test.

How can I find out where the change from 8 channels to 2 channels is
happening?  And how can I get 7.1-channel (or 5.1-channel) sound to
these outputs?

Please use `` [1] to upload more information.

Kind regards,



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