Hi @eso, thank you, and thank you for your helpful links and tips.
You are totally right, I haven’t put a lot of effort into my Plasma configuration yet. Part of this is that I’m still looking for the right Distro for my needs, which also means finding one that works (has some trouble with other distros before).
I’m pretty fine with reinstalling, as I wanted to get Secure Boot anyway. Upon my first install, I choose GRUB, because I wanted to use the ability of BTRFS to jump simply back to the last snapshot if anything went wrong with Endeavour. From what I read, Sytemd does not offer to boot into a previous snapshot I made with Timeshift. Instead, I will have to boot from a live stick and restore my system via Konsole from there [Tutorial] Convert to systemd-boot - #127 by anon49550872
This sounds quite inconvenient, and I start asking myself if I wouldn’t just be fine changing my password, so there won’t be any trouble in regard to the keyboard layout.
What is the code inside your summary meant for? I did not understand it.