I have a new Surface Pro 4 with a Surface Dock. I have connected my Dell S2340T monitor via the mini display port on the dock and the HDMI input on the monitor. I can see the screen fine but I get no touch features in Windows 10. Touch still works on the Surface's screen (I have it set for duplicate screens) but not on the monitor. Any ideas? It seems to be impossible to use Dell's online chat or telephone support as there is no service tag for the monitor!
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