Automatically disable laptop screen when it is closed

Help
1

I am using the latest version of KDE plasma on arch Linux.

I have noticed that when I have an external monitor connected to my laptop and use both the laptop and external screens at the same time, when I close the laptop screen it stays active as in I can still move windows to it, which then effectively become invisible because the laptop screen is closed.

I would like kde to automatically disable the laptop screen when closed. How can I do this? Currently I have to go to the settings and disable it manually.

Also once I disable it, the windows that were on it, do not reposition to the external monitor automatically. I have to press meta(windows key)+right arrow key to position them individually on the external screen. Is there a way for KDE to reposition them automatically making them fit on the screen if they are too big for the external monitor?

2

I’m using Debian 14 KDE Plasma 6.5.4, and have it exactly as expected with my laptop in a “desktop mode” (external monitor+keyboard+mouse). When I close the lid, it’s turned off (although seen still present in System Settings > Display Configuration), all open windows opened/positioned there are transferred to the external monitor.
Did you try ticking your external monitor as “Primary”? Maybe it will do the trick.