can you st the pulseaudio log?
https://wiki.ubuntu.com/PulseAudio/Log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/940551 Title: [7661AD1, Analog Devices AD1984, Speaker, Internal] Lost sound while playing videos To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/940551/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
