Setup an older eGalax Touchscreen on Pi3

I got a nice small monitor with touchscreen from a scrapped payment terminal. The touchscreen is manufactured by eGalax and has a normal USB-interface. Very nice for my Raspberry Pi. Except that it needs some work to get it working

sudo apt-get install xserver-xorg-input-evdev 

Add to /usr/share/X11/xorg.conf.d/40-libinput.conf :

Section "InputClass"
        Identifier "evdev tablet catchall"
        MatchIsTablet "on"
        MatchDevicePath "/dev/input/event*"
        Driver "evdev"