I have a second monitor (touchscreen) to add to a laptop (Win 7 64). Video is fed with HDMI, USB for the touch, and 12VDC for power.
It works perfect when plugged directly to the laptop.
But I need the screen about 13 feet from the laptop, so I need (?) to use a USB extension cable. Then the touch does not work.
I tried active and passive 5 meter cables.
A passive 4 foot cable does work.
Tried the monitor on another laptop(Win 7 64), and same results: does not work.
Tried on a Win 8 pro laptop, still no go.
Tried the touchscreen monitor on a desktop PC(Win 7 64): works fine. Add in the active USB extension cable, and still works fine. It loads as a HMI device, using standard Microsoft drivers (does not need drivers from the monitor mfg).
I have disabled the power management of the USB ports, and even taken apart the active cable to test for 5VDC, it is there on the far end of the active cable. When it fails on a laptop I get unknown device in the USB family tree in device manager.
Since it works on a PC, but not laptop I have to assume something is configured differently on a laptop USB, but I'm no "superuser". I'm just a guy who needs to add a second monitor and have the dang touch work. Any help is very much appreciated.