I have a machine with Ubuntu 12.04 installed, with dual monitor, via VGA and DVI Interface. The monitor is one touch screen and the other one is regular LCD Monitor.

The touch screen is made in China with some unknown brand, and I am using eGalax Driver. The touch screen is now detected and works, but i need to do some calibration since it does not correctly perform click on touch.

The problem is, when I’m using xinput_calibrator, it shows 4 crosses to be clicked on, because I’m using dual monitor, the crosses is now show 2 on the touch screen (touchable) and the others on the other monitor which is regular non-touch monitor.

Please help, thank you.

====TRIED THIS, NO LUCK=========

i tried to unplug the second monitor and then redo the calibration with xinput_calibration, and then saved it. Restart, all accuracy is fine, and the touch screen is working perfectly. BUT when then the 2nd monitor (Samsung LCD TV, via HDMI) is replugged, the touchscreen calibration was simply like gone, the accuracy is now lost. Touch on a point, the system click on another.

My screens was configured at 1024x768 on both monitor. With touchscreen on the left. System (Ubuntu 12.04 x64) sees it as big 2048x768 resolution.