Ok, there is 2 different problems here in the original report.
Firstly, could you please run apport-collect 1610293 in a terminal, so more information can be retrieved about your hardware.
Secondly, for the HDMI problem, could you please get a log from PulseAudio, as explained here: https://wiki.ubuntu.com/PulseAudio/Log. If you don't know what causes the switching of outputs, try and take note of when it happens, and then determine what you were doing when it happened.
Ok, there is 2 different problems here in the original report.
Firstly, could you please run apport-collect 1610293 in a terminal, so more information can be retrieved about your hardware.
Secondly, for the HDMI problem, could you please get a log from PulseAudio, as explained here: https:/ /wiki.ubuntu. com/PulseAudio/ Log. If you don't know what causes the switching of outputs, try and take note of when it happens, and then determine what you were doing when it happened.
Thanks.
affects ubuntu/pulseaudio
status incomplete