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I specifically chose an active DisplayPort <-> DVI adapter for use with EyeFinity right out of my graphic card vendor's list of confirmed compatible adapters.

Yet the screen fails horribly, it blinks on and off constantly, sometimes the graphics go screwy and the appropriate resolutions won't be available. Sometimes the resolution will be available but I'll discover it's only with interlaced refresh rates and bounces up and down. I have to switch the resolution back and forth, again and again, to get it to work correctly, and then it fails again and the process must be repeated the moment the monitor is turned off or I reboot. It's maddening.

What is wrong? Is my GFX card supplying insufficient voltage? (Firmware tweaks allegedly help some people, but my card's isn't modifiable.) Could the adapter be defective? Is it not "active" enough for my card and I need an expensive powered adapter? Is this endemic to DisplayPort in general?

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up vote 2 down vote accepted

Check the manufacturer's website for firmware updates.

It's worth checking if your active DisplayPort adapter has any firmware updates. Yes, I said firmware updates! Despite looking like only a simple cable, it has flashable firmware! If only I knew this a year ago.

For me my manufacturer's website had all of the relevant details, my part number, a description of the problem, and the exact fix. I would have found it ages ago had I even thought to look for such a thing.

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