Well, you’re a member now, so you should be able to: it’s just that your original screenshot lead nowhere, so I thought you were a basic user…
As to the screenshot itself: that looks like a hardware problem (stuck function key) and as you never posted an inxi --admin --verbosity=7 --filter --no-host --width, I don’t know what kind of hardware you have, but if you happen to have an Acer like me it’s Fn+F5 so try to unstick this key.
Hello, no stuck function key because it happens only while charging the battery.
My question is if there a way to disable that monitor chooser prompt, please?
I would disable it independently of the reason that leads to do that.
I solved by going to System Settings > Shortcuts > KDE Daemon and disabling the shortcuts related to Switch Display (Display and Meta+P).
I don’t know why, but the PC calls one of that shortcut while charging the battery.
I’ll investigate which one is called by the PC…
I hope this could help someone that has this strange issue.