This bug may be same as mine (I'm not sure, see https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/796262). If it is the same, you could use my brute-force solution to deal with it until better solution is found.
This bug may be same as mine (I'm not sure, see https:/ /bugs.launchpad .net/ubuntu/ +source/ pulseaudio/ +bug/796262). If it is the same, you could use my brute-force solution to deal with it until better solution is found.