If kdm does an auto login, it seems not to set up XkbVariant correctly. If the ergonomic neo layout is the primary german variant, certain key combinations will stop working (see below). The combination neo, nodeadkeys is also affected. This does not happen, if neo is a secondary variant, or if kdm does not login automatically. Reproducible: Always Steps to Reproduce: 1. Activate kdm’s auto login mode 2. Use an xorg.conf.d file to activate layouts de,de with neo,basic variants. 3. Restart kdm. Actual Results: Ctrl+F[1–12] will print the following in an editor: PQRS;3~;3~;3~;3~;3~;3~;3~;3~ Meta+<arbitrary-key> will also print random stuff. Expected Results: These combinations should be reported to X correctly. If you happen to speak german, you’d notice, that I gave the wrong command for reproduction steps in the linked URL. I’ll add a comment there for that. I guess I was to tired, when I reported it there. Besides that, I know of course, that sddm is default for KF5. So it would be nice, if you could support its developers to get it right this time.
Created attachment 93653 [details] Keyboard configuration for evdev/udev intended for xorg.conf.d
KDM is unmaintained and not used in KDE Plasma 5. SDDM is the login manager used in KDE Plasma 5. If you still have this same issue with SDDM, please file an issue on the SDDM bugtracker (after doing a search for existing issues first!): https://github.com/sddm/sddm/issues/