Black Screen after Waking - Windows 8

[GrandMaster]

Hey guys I'm having an odd problem - when I leave my computer and come back I find the screen blank. Clicking the keyboard "wakes" the computer and monitors but they continue to display black. At the same time my HDD Led blinks intermittently.

The odd thing is:

I have sleep, hibernate, and screensaver disabled. I have disabled all power controls in BIOS. My monitor is set to never turn off.

If the computer is performing some sort of task this doesn't happen.

Any help is appreciated.

This did not happen in Win7

[Shane Nokes]

What is the period of time that the system has to sit idle before this occurs?

[GrandMaster]

What is the period of time that the system has to sit idle before this occurs?

Maybe 20 minutes.

[MorganX]

Hey guys I'm having an odd problem - when I leave my computer and come back I find the screen blank. Clicking the keyboard "wakes" the computer and monitors but they continue to display black. At the same time my HDD Led blinks intermittently.

The odd thing is:

I have sleep, hibernate, and screensaver disabled. I have disabled all power controls in BIOS. My monitor is set to never turn off.

If the computer is performing some sort of task this doesn't happen.

Any help is appreciated.

This did not happen in Win7

This happens to me as well, but usually after 2 hours or more. I don't have a fix, I just stopped putting the computer to sleep. ACPI worked flawlessly for the first month. After some updates, which could have also been the latest AMD Radeon driver, I began experiencing this. I've recently stopped using DVI Out and have switched to Display Port to see if that results in any change in behavior.

[pack34]

Have you tried logging in when it happens? There could be a driver issue detecting a phantom monitor. The login screen could be being displayed on that instead of your physical one. It's happened on an older convertible of mine.

[GrandMaster]

Allright I got some more info

It is definitely related to my video card - which is a Radeon 7970

After some time the screen turns off and doesn't turn back on. Sometimes it turns back on, sometimes not. However the keyboard remains functional and I can switch songs, for example.

Unplugging the HDMI cable and plugging it back in fixes the problem.

However if I load a youtube video the entire screen goes green with artifacts and I have to reboot at that point.