Pen does not work properly

Various factors can affect the operation of the pen - please check the following:

• Ensure you have installed the DisplayLink or MCT Display Adapter for Windows driver as appropriate.
   

• Check Device Manager to make sure that the DTU appears in the list of connected devices - if not try reinstalling the Wacom driver and rebooting.
   

• Make sure the tablet USB is directly connected to a USB port in the back of the machine (a port on the mainboard) and not through a hub or other USB extension.
   

• In BIOS settings make sure that the options "boot from USB stick" and "USB legacy support" are turned off.  
   

• Try to move the tablet away from other electrical devices - sometimes proximity can cause interference resulting in pen jitter.
  If you see jitter effects try moving the tablet around to see if that has an influence on the issue.
  If this remedies the situation then either maintain that distance or use some shielding.
  Although it is not possible to give a definite rule for the correct distance to avoid interference we would recommend at least 30cm where multiple tablets are being used.
   

• Check Windows power management settings for USB as follows:

  • In Device Manager go to USB -> Root/Hub -> Properties -> Power management
  • Disable the option for Windows to turn off devices in order to save power.
  • If not Windows may disconnect or reduce the USB power and the tablet will then work as mouse only and the pen won't control the system cursor.  
     

• Connection considerations to ensure adequate power (insufficient power can result in intermittent pen response):

  • Ensure that the tablet is plugged directly into a USB port on the PC and not into a USB hub.
  • Connect the auxiliary USB cable on the DTU to a separate USB port on the PC to increase power availability to the DTU