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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...


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Found a workaround to this problem.

I found that the problem is with the kernel version.

Previously, I had version and after upgrade I got

As a workaround, I have to select the previous kernel version in the grub boot menu.

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