Thought I would revisit this once more to see if anything has been done. I have two UD-3900 devices; I use one with my Surface Pro and my wife uses one with her Lenovo Yoga2 Pro. In both cases, the UD-3900 is connected to an Acer touch-compatible monitor via HDMI/USB. With both setups, the touch functionality on the Acer external monitor is spotty at best. Often have to restart the laptops or unplug/replug the docking station to get the touch screen to work. Sometimes no amount of restarts/replugs will solve the problem and we just give up. On rare occasions, the touch function will work on the first try. Have tried the “Touch Calibration” process mentioned in another post, but the monitor doesn’t respond.