Hello,
I have a HP running Cisco Proximity version 3.0.2. When the laptop is on it's dock, it can display to our Cisco Room Kit Plus via Proximity. Once the laptop is undocked and docked again, the display is all black on the TV. You can still see the cursor, but everything else is blacked out. If we restart the laptop, and try it again, it works, but once we undock and dock again, the same issue happens.