Cubietruck: X11 configuration?

[outis]

I've installed Jessie vanilla server. Then i did a:

apt-get -y install xorg lightdm xfce4 tango-icon-theme gnome-icon-theme

(armbian.com/documentation)

 

But there is no xorg.conf.

 

root@cubietruck:~# find / -iname xorg.conf
root@cubietruck:~

 

Where do I put the X11-Section needed for the Calibration of my Touchpad-Display?

 

TIA