I suspect this is invalid DB data in the alsa drivers in the newer kernel. To confirm please remove indicator-sound (this can be installed again easily afterwards).
sudo apt-get remove indicator-sound ** Changed in: indicator-sound (Ubuntu) Assignee: (unassigned) => Conor Curran (cjcurran) -- Low sound level with USB-Headset after upgrade https://bugs.launchpad.net/bugs/575820 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