Right-click on the Sound icon, then Sound Settings.
You get to: System > Sound
You can do stuff directly in the first panel, but scroll down:
System>Sound>AllSoundDevices
Find your Display there, it could look like:
Click on it.
The first option in the detail view is to toggle it as a sound “output” device:
The options are “Allow” or “Don’t allow”. Once it’s blocked, it’s no longer in the list of options for switching easily between sound output devices (automatically or manually).
Right-click on the Sound icon, then Sound Settings.
You get to:
System > Sound
You can do stuff directly in the first panel, but scroll down:
System > Sound > All Sound Devices
Find your Display there, it could look like:
Click on it.
The first option in the detail view is to toggle it as a sound “output” device:
The options are “Allow” or “Don’t allow”. Once it’s blocked, it’s no longer in the list of options for switching easily between sound output devices (automatically or manually).