Same problem on a T60p. Sound wasn't working in dapper either. I've read reports that you could get it to work using alsaconf - however this tool is not included with ubuntu (nor should it as its highly deprecated...).
Must be a configuration problem, I remember reading something about front volume... -- x60 sound doesn't work in ubuntu https://launchpad.net/bugs/59852 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
