How to get touchscreen working on Lenovo Ideacentre A720

Question

I have a Lenovo Ideacentre A720 and using Ubuntu 12.04 after a lot of hard work to install it.

Sadly there is almost nothing to read in the Web about Ubuntu experience on this device.

I'd like to use the Multitouchscreen, just Monotouch would be als ok.

It's a 27" CoolTouch(TM) from the Advanced Silicon S.A. Company http://www.advancedsilicon.com/web/products/touchassps/cooltouch.html

xserver-xorg-input-evdev is installed

some more infos

$ xinput_calibrator 
Error: No calibratable devices found.

$xinput list 
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ Logitech Unifying Device. Wireless PID:4017       id=9    [slave  pointer  (2)]
⎜   ↳ HID 0a5c:4503                             id=11   [slave  pointer  (2)]
⎜   ↳ Lite-On Technology Corp. Lenovo silver silk (wireless) 2.4G K&M kit           id=14   [slave  pointer  (2)]
⎜   ↳ Lite-On Technology Corp. Lenovo silver silk (wireless) 2.4G K&M kit       id=15   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ HID 0a5c:4502                             id=10   [slave  keyboard (3)]
    ↳ Lenovo H264 720P Camera                   id=12   [slave  keyboard (3)]
    ↳ Lite-On Technology Corp. Lenovo silver silk (wireless) 2.4G K&M kit       id=13   [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard