Thanks for posting. I’m sorry the Ethernet port on the dock isn’t working as expected. I’d be happy to help.
You may have already tried this, but just to be sure have you tried re-enabling the Ethernet adapter for the dock in the Network Connections application? You can right-click on the Microsoft logo on your desktop and select Network Connections to bring up the list of all the detected network adapters. You can then right-click on the Plugable Ethernet adapter and select Enable from the context menu that appears.
Assuming you have tried that, the next thing to look at is the lights by the Ethernet port on the back of dock to see if they are lit (you should see a green and amber light). If they are not that may be an indication that your are connecting to an older Ethernet hub that uses half-duplex communication, and our dock only works with full-duplex devices.
If the lights are lit, the next step would be to clean the DisplayLink driver for the dock from your system (this includes the driver for the Ethernet port) and re-install the latest version. Please follow these steps:
Disconnect the dock from the computer and please remove the power cable from the dock so it turns off completely. Please keep it disconnected until the last step.
Uninstall the DisplayLink Core software from the Control Panel -> Programs and Features. Don’t worry if this fails, just move onto the next step
Download and run the DisplayLink cleaner tool, found here:
Once the Cleaner has been run, reboot (even if not prompted to)
Now download and run the 7.7 M4 DisplayLink software, found here:
Reboot, even if not prompted to
Once you’re back in Windows, reattach the power cable to the dock first. Once the dock is powered on, reconnect it to your PC which will trigger the final portion of the installation
Please let us know if our suggestions help (or any additional details), and we can determine the next steps and go from there.