https://bbs.archlinux.de/viewtopic.php?id=28551&p=2 http://www.gentooforum.de/artikel/22452/sddm-tastaturlayout.html
echo "setxkbmap de" | sudo tee -a /usr/share/sddm/scripts/Xsetup
localectl status
cat /etc/X11/xorg.conf.d/30-keyboard.conf Section "InputClass" Identifier "system-keyboard" Option "XkbLayout" "de" Option "XkbOptions" "nodeadkeys" EndSection
edit /etc/sddm.conf and in [General] section remove the bit to the right of the equals sign in the line InputMethod=qtvirtualkeyboard