External touch screen input only uses cursor coordinates

I have a ViewSonic touch screen display connected to an Android PC (kernel 3.0.36+) via HDMI & USB. The display shows everything correctly. Furthermore, the Linux kernel recognizes it.

dmesg:

<6>[   99.699034] usb 2-1.2.3: new full speed USB device number 8 using usb20_host
<6>[   99.800896] usb 2-1.2.3: New USB device found, idVendor=0408, idProduct=3008
<6>[   99.800993] usb 2-1.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=4
<6>[   99.801099] usb 2-1.2.3: Product: OpticalTouchScreen
<6>[   99.801169] usb 2-1.2.3: Manufacturer: Quanta
<6>[   99.801226] usb 2-1.2.3: SerialNumber: 0000
<4>[   99.805402] quirks: 0x00000000

The problem is that the screen, while I can touch anywhere, only registers the tap at the curser location (wireless keyboard/mouse connected). If I move the cursor and tap anywhere on the screen, the new location receives the tap. If I remove the keyboard/mouse dongle the behavior remains, but now I can't move the cursor.

The USB connection to the monitor is being displayed (highlighted) in dev/usb :

Input device configuration file located in /system/usr/idc/Vendor_0408_Product_3008.idc

# Input device configuration file.


# This is an external device, attached to the USB or Bluetooth bus.
device.internal = 0

# The device should behave as a touch screen, which uses the same orientation
# as the built-in display.
touch.deviceType = touchScreen
touch.orientationAware = 0
touch.gestureMode = spots

# Orientation
touch.orientation.calibration = vector

# Output Ranges
output.width = 1920
output.height = 1080
output.diag = sqrt(output.width ^2 + output.height ^2)

Any guidance or suggestions are appreciated!

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