I have the same problem with a logitech usb headset. It sometimes helps to disconnect the usb headset for 30 sec (dbus, phonon, udev check interval ??) . Then it is listed in the kmix dialog as e.g. headset #8 (it counts up the headset, although it is the same headset).
I think, in the 14.04 release this phonon-/kde-version is buggy and changed also the behaviour of the phonon audio device handling. => This 30 sec check interval is not on 12.04 and the mixer of the headset comes back immediately after suspend or replug of the headset without counting up the headset label, "saying" it is a new device. The KDE-team tried to fix the Master-Channel bugs, but introduced new bugs and this in the end of the kde4 releases :-( Furthermore I have to set the Master Channel again on both 12.04 and 14.04 after suspend or replug of the headset, because this never worked automatically. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1314549 Title: USB-headset undetected by Phonon To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1314549/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
