One of the bug reports upstream (at alsaproject.org) mentioned upgrading BIOS helped solve this.
** Summary changed: - AC97 onboard sound not working in hardy alpha6 + nVidia CK804 AC97 onboard sound not working in hardy alpha6 -- nVidia CK804 AC97 onboard sound not working in hardy alpha6 https://bugs.launchpad.net/bugs/203482 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