Which version of the drivers are you using? We had an issue with driver matching in 2.0 but the 2.1 beta should have resolved it. We cannot reproduce this specific issue at the moment.
If you are already using the 2.1 beta can you collect the logs the next time you have this issue? To collect good logs in this case please boot without the device connected, log in to your account, connect the device and then collect the logs.
The log tool is at
http://www.displaylink.com/support/ticket.php?id=269
You can attach the logs here or send them through
http://www.displaylink.com/support/ask_question.php
Thank you,
Carlo