Monitor on but black display

[longplaypg]

Originally Posted by rsenio

Apparently I can confirm the same issue. Came into the office this morning and found one monitor on, but just a black display. Rebooted a few times, even uninstalled/re-installed 7.4 M2 and tried to setup the displays again. Funny thing is that 7.4M2 has been installed since its release. On the 28th of Oct Nvidia released driver 331.65 for my Dell XPS 14. However, like I said this wasn't an issue until today.

Did you have the XPS lid closed so only the displaylink displays were active?

I know on my older system the NVidia driver are definitely not 331.65

Were you able to wake the black monitor by starting an app that needed user account control permission?