What's the output from ``lsof /dev/dsp* /dev/snd/*'' after the usb audio device is unplugged before you've changed the default card to non-usb in gnome-sound-properties?
** Changed in: gnome-volume-manager (Ubuntu) Importance: Untriaged => Low Status: Unconfirmed => Needs Info -- USB dead after unplugging default USB audio adapter https://launchpad.net/bugs/50838 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs