UD-3900 rev2 logitech keyboard / mouse usb transmitter not working in plugable ports

I’ve been using the logitech mouse keyboard usb for a long time plugged into
the plugable ud-3900. Last week none of the ports on the 3900 will recognize
the logitech usb transmitter and connect the devices. Tried them all.

Only plugging the transmitter into the laptop directly works now.

Thank you for any assistance.


Hi Mike,

Thanks for posting!

Generally, the first steps we’ll want to take is to make sure that the software used by the dock is in a good state by reinstalling the DisplayLink software and running the DisplayLink cleaner tool. To do so, please follow these steps:

  1. Disconnect the dock from the system and please remove the power cable from the dock so it turns off completely (this is important so the unit resets). Please keep it disconnected until the last step
  2. Uninstall any and all software with ‘DisplayLink’ in the title that is present from within the Control Panel -> Programs and Features. Don’t worry if these entries are not present or if the process does not work, just move onto the next step
  3. Download, extract and run the DisplayLink cleaner tool (https://s3.amazonaws.com/plugable/bin/DisplayLink/DisplayLink+Installation+Cleaner+8.4.2368.exe)
  4. Once the Cleaner has been run, reboot (even if not prompted to)
  5. Now download and install the 8.6 M1 DisplayLink software (https://s3.amazonaws.com/plugable/bin/DisplayLink/DisplayLink+USB+Graphics+Software+for+Windows+8.6+M1.exe)
  6. Reattach the power cable to the dock first. Once the dock is powered on, reconnect it to your system which will trigger the final portion of the installation

Does this help with the USB ports?

Thanks for giving us a chance to help!


Thank you so much.

  1. disconnected from laptop.
  2. unplugged for 20 seconds.
  3. reconnected.

All is well now.

Thank you and have a Merry Christmas.


Hi Mike,

Glad to hear you’re up and running!

We’ll be closing this thread, but should you have any future questions or concerns, we’re happy to help – just contact us directly at support@plugable.com.

Happy holidays!