I have such a problem with version 6.1 and work fine with version 5.4 with this touch screen :
http://www.hantouchusa.com/4-wire%20specs/HT150A-NENBS52-R.pdf
http://www.hantouchusa.com/controller%20specs/HTUSA-EBU4-3.pdf
Sorry it's reference of the touch-screen and touch screen controler as OEM product as I'm do my personal touch screen monitor with EOM material and a classical 15" TFT screen !
I have to downgrade my Frog to V5.4 to use touch screen function. ;(
In fact when I try to calibrate on version 6.1, the green box with cross inside don't recognize that I touch the screen and never change color and move at a another point. Certainly because the touch screen controler isn't recognize anymore by the OS. I try of course to reinstall the OS 6.1 at least two times and I change the USB port too... but when I downgrade, everything work fine !
I hope this complete description help you to find the problem for the next revision !
