Wow, without Option "XkbModel" "microsoft" it doesn't crash. My settings are now Section "InputDevice" Identifier "Generic Keyboard" Driver "kbd" Option "CoreKeyboard" Option "XkbRules" "xorg" # Option "XkbModel" "pc105" # Option "XkbModel" "microsoft" Option "XkbLayout" "de" # Option "XkbVariant" "nodeadkeys" EndSection