Bug#914924: Acknowledgement (pulseaudio: Re-Selects HDMI output when monitor is turned OFF and ON.)

[James Shatto]

Apparently this also extends to power saving states, which I normally disable.

$ xset -dpms s noblank s noexpose

When NOT set this way, when the monitor powers off (inactivity) and back on with input (mouse movement / keyboard), it will change the audio routing to favor the HDMI of the monitor, not my usb audio interface attached to speakers. Solved by running pavucontrol to turn off the hdmi output (AGAIN).