How to implement smart screen off on xubuntu 18.04?

Question

linux

How to correctly configure the screen off on xubuntu 18.04 LTS?

1. When trying to do this with standard tools, I encounter screens turning off during video playback. In general, it would be great to set up a timer to turn off all screens except for the one on which the video is playing.
   
   
2. When you try to use caffinethe problem remains, only the screens are now not completely turned off, but are highlighted without an image.
   
   

Answer 1

try it, you may have to / re / cut the lightsOn.sh
script , I just have the screen turned off when idle, after 10 minutes.
I can't move my mouse