Thanks for contacting us! I am sorry this is not working as expected.
Based on your description of the behavior, our first step is to get some additional information from your system.
If you would, next time the displays fail to detect, please keep the dock connected and both monitors attached (even though they are not working) and attach the output of our diagnostic utility PlugDebug ( http://plugable.com/support/plugdebug ) to an email to “support@plugable.com” with the subject line “Ticket #262636 - Attention Pat”, this will allow us to examine some log files from your system to help determine the next steps.