To help pinpoint whether this is a driver regression, please try model=ref:
sudo /sbin/alsa force-unload && sudo modprobe snd-hda-intel model=ref && speaker-test -c2 -Dplug:front
To help pinpoint whether this is a driver regression, please try model=ref:
sudo /sbin/alsa force-unload && sudo modprobe snd-hda-intel model=ref && speaker-test -c2 -Dplug:front