@fabby
This is a tricky one
The HDMI audio to the TV must be suspended or not available in some way when the screensaver is active, but no way to get terminal data to know exactly whilst the screensaver is active
@Nick1402
Try this first for working around the screensaver
In Xfce the screensaver can be disabled whilst watching TV
Left click the Power Manager icon in the panel and turn on Presentation Mode
The Presentation Mode orange indicator icon might need to be turned on in the Power Manager plugin settings
That will prevent the screensaver being activated and audio will continue to play to HDMI
But audio streams would still switch from HDMI when Presentation Mode is turned off
Try unloading the Pulseaudio module most likely to be causing this
pacmd unload-module module-suspend-on-idle
The module will only be unloaded temporarily. If it works Pulseaudio can be reconfigured to remove the module permanently
If it does not work, it will likely require changing ALSA configuration to disable power saving