Comment 10 for bug 412688

I also have the same problem, I don't know if this is relevant but I found a temporary workaround in this post (comment #15):
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/421250

I added "options snd_hda_intel model=laptop" to the end of
"/etc/modprobe.d/alsa-base.conf"

After each reboot execute:
sudo alsa force-reload

I just have to fix the volumes and I have my sound back (until the next reboot that is), the only problem I have is that if I plug my earphones I can listen audio both on the earplugs and in the laptop speakers, in 9.04 I could bypass this problem by selecting the type of output and cutting out the other one (I cant use the speakers at work anyway so... who cares). But now if I choose in the "output" tab "analog headphones" I can't listen audio on any of the two. If I choose "Analog output" I go back to hearing on both interfaces.

I know it's not a technical post but was hoping this could help, ask for any output I will provide them asap.

My first post here, so I just wanna say THANKS for all your hard work, even with this kind of regression, you guys are building release after release one hell of a OS!!!
Renato Campus