Quote Originally Posted by gransonik View Post
My Gateway P-6860FX also lost speaker sound after upgrading from intrepid. However, if I boot into the previous kernel 2.6.27-11, both speakers and headphones work perfectly. I've tried all kinds of fixes from editing alsa-base.conf to reinstalling alsa drivers without any luck. Maybe the problem lies in the 2.6.28 kernel upgrade from intrepid to jaunty. Any thoughts?
I have the same model as you, and unfortunately the same problem as well. Followed everything markbuntu said in this post and his massive posting here:
http://ubuntuforums.org/showthread.php?t=843012
but I had no luck.

This also happened to me when I upgraded from Hardy to Intrepid. Back then, I fixed it by following the instructions in this post:
http://ubuntuforums.org/showthread.php?t=380578
but the article it links to is no longer there I don't quite remember what it said, but all it did was get my speakers back. However, I do remember that after about a week or so, they fixed everything in an update.

I'd be willing to just try a fresh install if anyone could confirm that it has worked on a gateway. If you have any luck though, please let me know