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I upgraded my VGA-with-converters cable to a straight DVI-D cable yesterday, and now Ubuntu 12.04 can't find the monitor I upgraded the cable for. I've tried switching the cables around on the video card (a GeForce 8800) and changing the drivers from the recommended driver to the post-update driver via Advanced Drivers, but no dice.

Both screens are fine in Windows 7, so I know it's not a hardware problem with the monitors, cables, or video card. The secondary monitor is still on a VGA-to-DVI-D conversion, but the main monitor -- which is native DVI-D plugging into a native DVI-D port on the video card -- just can't get found no matter what.

Any ideas?

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I'm seeing something similar. While although I would think Ubuntu 12.04 would have great hardware support, it is possible that the hardware we have is not supported. I went to my board's vendors driver site (Asus on-board video) and couldn't find video drivers for Linux. It may be more likely that my on-board video is less supportable than your card, but I might try your card's vendors driver site. – nicorellius Sep 12 '12 at 16:25

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