Ubuntu 12.04 HP dv7-3170 with Codec: IDT 92HD75B3X5
i solved this problem by adding the following line to alsa-base.conf
options snd-hda-intel model=hp-dv5 enable_msi=1
yesterday after applying all updates via update manager i have no sound on my speakers and on my earphones. if i comment the above line in alsa-base.conf i get sound again and also get my original problem.
what can i do to revert changes...