Re: 8-channel HDMI outputs show up as 2 channels only on recent Intel laptop

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 `alsa_info.sh` [1] to upload more information.


Kind regards,

Paul


[1]: https://www.alsa-project.org/alsa-info.sh


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