German Keyboard Layout

Hello All!

I have installed XBMC on a Ubuntu 12.10 system with a german keyboard.

Starting XBMC out of Gnome I get the right QWERTZ layout.
When I start it directly from lightdm, then the keyboard layout is an English one (QWERTY).

Is there a possibility to change the keyboard layout?
The display language setting is English, but changing it to German, there is no difference ...

Can anyone help?
Thanks!