You need to have a root-password for this. If your not already having one do the following:
- Open a terminal (type terminal on desktop or use menu)
- enter your preferred password
- that password can now be used for all commands that need admin rights (those commands begin with sudo)
Now open a terminal, open the file with
nano and put in the
XKB_DEFAULT_LAYOUT into the file and press
STRG+X and press
y to save the file.
reboot your steam deck and german keyboard layout will work in gaming mode (Happy qwertz!)
Edit: you can also use the decky plugin “KLang” in gaming-mode!