I have two monitors connected to this system... one via displayport and one via DVI. When I go into the screen saver settings, I enabled Power Management and set standby, suspend, and off to 1 minute. After that minute, the DVI monitor goes black as expected (backlight turns off, and the power light changes to amber signaling power save mode), but the displayport monitor power light stays blue, screen is black but the backlight remains on.
How should I go about starting to diagnose this issue? I want to make sure that both monitors completely go into power save mode after a specified time frame.
FWIW this machine has an Nvidia Quadro K600, and I have the proprietary Nvidia drivers installed. Monitors are both ASUS PB278Q