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

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alsa-info.sh upload at

http://alsa-project.org/db/?f=c20d56cb6e1d63e06ebae27b806abfdb66874718



On Thu, 2022-07-14 at 00:53 +0200, Paul Menzel wrote:
> 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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