Codec: SigmaTel STAC9228(Dell XPS m1330).
Change /etc/modprobe.d/alsa-base.conf
# Power down HDA controllers after 10 idle seconds options snd-hda-intel model=dell-3stack
sudo alsa force-reload
In 'Sound Preferences' -> 'Hardware' set Profile -> Analog Stereo Duplex
Codec: SigmaTel STAC9228(Dell XPS m1330).
Change /etc/modprobe. d/alsa- base.conf
# Power down HDA controllers after 10 idle seconds
options snd-hda-intel model=dell-3stack
sudo alsa force-reload
In 'Sound Preferences' -> 'Hardware' set Profile -> Analog Stereo Duplex