A Wacom USB touch screen is connected to Intel QM57 chipset pins USBP3P and USBP3N on an Xploretech  iX104 tablet, but 
does not appear when a "usb" command is issued in a terminal window. How can one set up the usb port to detect output 
from the touch screen device? The finger print reader shows up on USB0 device address 3 as expected, even though no 
driver is mounted. I would like to capture output on the USB ports if possible.