Found it! Problem persists with 2.6.20-5-generic. I'll attach a dmesg output.
** Attachment added: "dmesg of a boot using linux-image-2.6.20-5-generic" http://librarian.launchpad.net/5625532/dmesg -- No sound on thinkpad T43p in feisty https://launchpad.net/bugs/78299 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
