Nem ez a gond, közben meglett a megoldás:

/etc/X11/xorg.conf.d/10-evdev.conf

Section "InputClass"
Identifier "evdev keyboard catchall"
MatchIsKeyboard "on"
MatchDevicePath "/dev/input/event*"
Driver "evdev"

# Keyboard layouts
Option "XkbLayout" "hu"
EndSection