EvanC Posted August 31, 2011 Share Posted August 31, 2011 Hello. I've got an ATI 6850. I recently picked up a 3rd monitor which I am connecting through the card's displayport. The other two monitors are connected via DVI. I was pleased to discover that this 3rd monitor worked out of the box-- no additional configuration was required. However, the monitor doesn't recognize that it's plugged in immediately, I have to unplug and re-plug the displayport to get it to recognize there's a signal being sent (even though it shows up under display preferences). Once I have done this it works great. How would I avoid having to re-connect the displayport every time I boot my computer? Thanks! Link to comment Share on other sites More sharing options...
delifruit Posted September 1, 2011 Share Posted September 1, 2011 In your com.apple.Boot.plist, find graphic mode. <key>graphic mode</key> <string> 'number1' x 'number2' x32 </string> number1 and number2 should be your monitor's maximum resolution. I am using dell U2311H and samsung 17 inch monitor. In my case, when I use 1650 x 1050 x 32, second monitor is not recognized by MAC and after re-pluging, it is recognize by MAC like you. but when I use 1920 x 1080 x 32 which is U2311H's maximum resolution, second monitor is reconized by MAC on start. Link to comment Share on other sites More sharing options...
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