execute: ‘touch /etc/modprobe.d/alsa.conf’ if you do not have the file ‘alsa.conf’ already in your /etc/modprobe.d.
execute: ‘echo “options snd slots=snd-usb-audio,snd-hda-codec-hdmi” >> /etc/modprobe.d/alsa.conf’
This worked for me since I have a Graphicscard, for laptops I guess ‘snd-hda-codec-hdmi’ has to be swapped with ‘snd-hda-intel’.