try this in terminal:
sudo modprobe snd_hda_codec
sudo modprobe snd_hda_intel
sudo modprobe snd_hda_intel_codec
and see if you have any change on dummy device to another codec
try this in terminal:
sudo modprobe snd_hda_codec
sudo modprobe snd_hda_intel
sudo modprobe snd_hda_intel_codec
and see if you have any change on dummy device to another codec