I found bug 502685 which describes the same problem I'm having, except there on 9.10 and with (different) Intel/Realtek ALC882 mixer
-- [Intel Eaglelake HDMI] 10.10rc line in problem with gnome-volume-control https://bugs.launchpad.net/bugs/656466 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