Have a problem with my screens.
Sometimes they do not go to sleep. I have set the sleep time to 10min, and this work sometimes, and sometimes not. Maybe an open browser can do this? Is it other places than in power settings that control this function?
Are running 21.10, but as same problem on 21.04.
Found a solution after som Googling.
Typed this in terminal: xset dpms 300 600
Seemed to do the trick for now. Hope it works stabile.