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3 Monitors on Asus Radeon HD 6850 - DVI/HDMI/DP->VGA, DP Active Adapter Not Working

post #1 of 3
Thread Starter 
Fresh install of Windows 7 with all updated drivers and CCC. All monitors are detected - HDMI, DVI, and DP. Using a DP to VGA active adapter (says DAC right on the box). DP is recognized and resolution is correct for the projector it is hooked up to, but I am not getting signal.

I get an error message on startup about the DP. I will reboot, screenshot that and post back here. I will also grab another VGA monitor and attempt to hook that up.

In the meantime, perhaps one of you can provide a solution.

Graphics Device: http://www.newegg.com/Product/Product.aspx?Item=N82E16814121399
post #2 of 3
Thread Starter 


Above is the error.

I have been unable to test on another vga monitor because it is broken and takes anywhere between 1-3 days to turn on after hitting the power button.

When I take a screenshot, the display is shown - the problem does not appear to be on the software side of things. Perhaps the DP port itself or the adapter. I can't test the port because I don't have a monitor with DP in.
post #3 of 3
Thread Starter 
It works now, but only at higher resolutions. The projector's native resolution is 1024x768, and I can run any resolution above that, but nothing at or below it.

When I boot up my PC, the projector shows the resolution to be 1024x768, but when I log on to windows, it changes to 1280x1024 or I get displayport link error (which is what happens any time I try to use 1024x768).

The other day, I had it running at 1024x768 for some time (so I know the DP->VGA will display it when booting or while windows is running), but I'm not sure what has changed since then.

Any thoughts?
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