I habe another “magically solved itself” story with solution.
When I leave my PC on for a long time without needing to access it, e.g. to make a backup or some long updates, I always lock it. This ensures that the monitor turns itself off.
Or so I thought. Mostly I would only look at it, when accessing it again, since it faces away from the door. Then the screen was off.
But sometimes when I didn’t want to use it, the screen was on. This really bothered me for a long time. When I wanted to use it, the screen was off and when I didn’t, the screen was on.
Some day it just stopped happening. The screen was always off.
Just last week I found out why this all happened.
It was my phone. I have my mouse on the left side and always place my phone to the right. Except when not sitting at the desk. Then I put the phone on the left side which faces away from the wall. There it slightly shook the mouse thus activating the screen and gaslighting me. Last month I thoroughly cleaned my desk and now I don’t have to place the phone on my mousepad anymore.
Let’s just call it a nonprofit.