I got the same chipset and the same problem.
Solution for me was simple:
sudo /etc/init.d/alsa-utils resetNow sound works fine :) -- [Lucid] [CA0106 - CA0106] PA test tone failed (alsa tone succeeded) https://bugs.launchpad.net/bugs/550232 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
