Confirmed on Karmic with updates at December 5. There's a conflict with SmartLink modem's proprietary drivers. Removing these drivers it works correctly.
Many users reported it on Ubuntu forum: http://newyork.ubuntuforums.org/showthread.php?t=1308809&page=4 See comment #34 ** Changed in: pulseaudio (Ubuntu) Status: Incomplete => Confirmed -- [karmic] No sound on Intel 82801H HD Audio https://bugs.launchpad.net/bugs/411574 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
