I just purchased the UD-3900 dock at the beginning of March and hooked it up to my Dell u2311h with a DVI-out to HDMI-in cable. Everything was working great for a while. Just three days ago, the only video I get out of the dock is a solid green screen. A replacement DVI-to-DVI cable worked for a split second but then reverted to green screen.
Of course, I’ve restarted the monitor, checked the connections, restarted and tried on two different computers, and also ensured that the DisplayLink manager software is up to date (v8.1.848.0).
Direct connection to the computer produces video as expected.
What more can I do? Is the dock faulty?