Comet Lake: Dummy output and soundcard not detected

Support Audio
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10

" * Create /etc/modprobe.d/alsa.conf, the option index will make sure the analog output is the default (and not HDMI), the option model will notify the driver our board model which will make the built-in microphone usable (you can try instead model=alc283-sense-combo or model=,alc283-dac-wcaps).

/etc/modprobe.d/alsa.conf

options snd_hda_intel index=1 model=,alc283-chrome

  • Use the ~/.asoundrc file from [11].

  • If having problems with headphones (perhaps no audio playing), try alsactl restore (requires alsa-utils) in terminal. Now, ALSA should automatically switch between channels when using headphones/speakers.

  • To fix Flash audio with PulseAudio, use the ~/.asoundrc file from [12]."

https://wiki.archlinux.org/title/Chromebook#Fixing_audio