Warning: HMD Connection has poor tracking quality (It was just too fast so I couldn't read it for sure) Anyway...
That is to do with the OculusServer is Running but did not get a wake up to connect to the HMD due to the Win10 Update being energy efficient. It can do this anytime at all for any Oculus Device. You need to use RESTART within the Oculus Menu, OR use RESTART OCULUS SERVICE in Debug Tool, OR close all Oculus Tasks in Task Manager then run Oculus, OR REBOOT (the first is best choice but the last also clears your RAM).
ANY Nvidia Driver will work and it's subjective if any are actually better than others. The reports of Black Screens came about during the same time of other issues involving Firmware Updates not completing fully to allow Setup to Work OR other cable/socket pins problems from standard use of twisted and kinks cables. Some Nvidia Drivers were said to be a problem for some GTX10** Series and it really is not made clear what we should use.
I use what Win10 selects: 388.13 and leave it until when it wants to Update later. Too much of Users testing Drivers going forward/rolling back and cleaning with DDU cause issues with your systems ability to use System Restore. I say just let Windows decide. The Updates are all there to advertise new games!