UD-3900 DisplayLink Frequently stops working all of a sudden

Hi, I have a UD-3900 which I use to connect my laptop to a monitor. But around 30-40 minutes after EVERY boot DisplayLink just suddenly stops working (USB ports and audio output works just fine) and the icon which indicates the operation of the DisplayLink Manager disappears (I assume that it stopped working).
Every time this happens I go to “Devices and Printers” in “Control Panel”, and right-click “DisplayLink USB Graphics Device” -> “troubleshoot”. Although at the end it always says “Troubleshooting couldn’t identify the problem”, but sometimes it fixes the problem. Until it all happens again.

I am using a Lenovo T440s and have installed the latest driver. I have tried to reinstall the drivers.

Is there any way to prevent this from happening again? Thank you very much! :slight_smile:


Thanks for posting. I’m sorry your docking station isn’t working as expected with your T440s, and I would be happy to help.

I can see you have also posted another question about a Wake on LAN issue (http://support.plugable.com/plugable/…) , so I will speak to that issue here as well to keep everything in the same place.

To the issue of the dock stopping working intermittently, the first step is to ensure that the DisplayLink driver is in a good state by performing a clean install. 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. Please keep it disconnected until the last step.
  2. Uninstall the DisplayLink Core software from the Control Panel -> Programs and Features. Don’t worry if this fails, just move onto the next step
  3. Download, extract and run the DisplayLink cleaner tool, found here –> https://s3.amazonaws.com/plugable/bin… (video walk-through -> https://youtu.be/AcVV1gD_FvI)
  4. Once the Cleaner has been run, reboot (even if not prompted to)
  5. If running Windows 10, please run Windows Update (Start > Settings > Update & security). Reboot if/when prompted. Repeat this process until there are no new updates found. This is important as Microsoft has been releasing frequent updates to Windows 10. If not running Windows 10 just skip to the next step.
  6. Now download and install the 7.9 M5 DisplayLink software, found here –> https://s3.amazonaws.com/plugable/bin…
  7. Reattach the power cable to the dock first. Once the dock is powered on, reconnect it to your system when prompted by the installer which will trigger the final portion of the installation and test the behavior again.

In regard to the Wake on LAN issue, one thing to check is that the 'Wake on magic packet" in enabled as described here -> http://support.displaylink.com/knowle… and the remaining power management setting are as described here -> http://support.displaylink.com/knowle…

Let us know if that information helps when you have a moment and we’ll go from there.

Thank you,

Plugable Technologies