I have (partially) solved the issue. No microphone but at least sound,
Not sure which of these is critical but I would do them all.
- upgrade kernel to 6.8
- load 2.9 sof-bin from repo (NOT from AUR as it is not latest)
- make sure pipewire is enabled and add some lines to alsa-base.conf in /etc/modprobe/d
details.
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upgraded kernel to 6.8 using manjaro settings. Make sure your boot loader is loading this kernel
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see here
https://askubuntu.com/a/1424600
and then download release here and run install.sh
and make sure any other sound related kernel options/modules you might have set are disabled/removed.
systemctl --user --now enable pipewire pipewire-pulse wireplumber
Also I had to add this in /etc/modprobe.d/alsa-base.conf
options snd-hda-intel dmic_detect=0
options snd-hda-intel index=0