Solved. Problem only happend when using live cd. When installed on disk, sound started working again. And kept working after running update manager.
** Changed in: alsa-driver (Ubuntu) Status: Incomplete => Confirmed -- Soundcard not detected https://bugs.launchpad.net/bugs/551318 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs