I'm having the same problems, very low sound volume with every kernal > 2.6.20-8. Tried the various modprobe suggestions to no avail. Am attaching files requested from debuging sound problems page.
** Attachment added: "amixer output" http://librarian.launchpad.net/6855075/2.6.20-12amixer -- [Feisty] Sound card (HDA) no more detected after switching from -8 to -9 https://launchpad.net/bugs/88400 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
