On Saturday morning Windows Update (running Windows 8 Pro) delivered a driver update for the NVIDIA GeForce GT 525M video card in my Dell XPS 15z. This caused the Plugable UGA-2K-A to no longer function (LED only lights for a moment, main display also blacks out or flashes). I tried two different UGA-2K-A devices and both had the same behavior.
Doing a “Rollback Driver” on the NVIDIA GeForce GT 525M Driver solved the problem, and the Plugable UGA-2K-A is working again fine. Although I am now working again fine, this is rather concerning behavior which should be investigated. If I were to re-install Windows 8 from scratch, I’m not sure how I could get back to the older NVIDIA driver.
I’m running the 7.0 DisplayLink driver, but I also tried going back to 6.3M1 and the issue still occurred.