This a Windows 8 HP Pavillion which has just had a new graphics card fitted. The new card is an Nvidia GEForce GT640. There are 2 monitors connected.
The problem now is that when a user logs off, we see the screen saying that the user is being logged off. Then the screens fade to black and wont come back on with any command from the keyboard.
The work around is to unplug one monitor and plug it back in again. As soon as one monitor is disconnected, the other one wakes up to show the login screen. Then when the cable is re-connected, that monitor wakes up also.
What is the fix for this?