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Plugging in DVI Shuts Down All Displays

Question asked by categorytheory on Nov 25, 2015

I boot up my machine with just the HDMI output on my Radeon 7870 (on a Windows 10 64-bit box) going through my A/V amp and to the monitor, and the display works ok (aside from the sizing issues I talked about in my other post). As soon as I plug in a cable from the DVI output on my card to the monitor, I get "no signal" on both the DVI and HDMI inputs on my monitor.


How do I convince my card to give me output on either of the DVI or the HDMI when both are plugged in or, better yet, output on both?