Hello Sylvia,
Thanks for your reply, the new driver was released for trusty tahr and I tried installing that to no effect. I have finally had an opportunity to try loading Windows 7 64-bit. I just loaded it about 2 hours ago and many of the drivers were missing, so I downloaded the latest driver bundle (May 2014) and installed the graphics driver from that for my test. It requested that I reboot, but now I after I reboot, I have no display output at all. The oddest part is that I don't even get display output for the BIOS.
I disconnected from the displayport hub and tried the cable directly to a monitor (from the NUC). I unplugged the power from the NUC so that I could be certain it was off. I replaced the power and turned the NUC back on and I still have no output. I tried another displayport cable and the other monitor both. I went back to the hub with another cable and still no output at all. This seems very odd to me that I suddenly have no video. Please help!! I do have the NUC audio connected and can hear the windows sounds (like it finished loading).
I strongly prefer not to use DVI/VGA or adapters for these, since this was part of the reason for my monitor and NUC purchase--to use the newer displayport/hdmi technology. Unfortunately the monitors do not support HDMI, so I am left with DisplayPort capability only.