Selected Sound Output Device Not Persisting Between Reboots in gnome-control-center

Solution 1:

I have had the bug report suggestions setup this way for along time as sound is always routed to TV and I don't want it to switch to tinny laptop speakers.

Use sudo -H gedit /etc/pulse/default.pa and find the lines:

load-module module-switch-on-port-available
load-module module-switch-on-connect

Change them to:

#load-module module-switch-on-port-available
#load-module module-switch-on-connect

Save the file and use: pulseaudio -k

Note 1: It's been reported that plain sudo now performs like sudo -H in 19.04 but caution dictates using later method.

Note 2: Earlier versions of Ubuntu will only have the first configuration line.