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3rd Monitor Works-- but only when I unplug/plug it!


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#1
EvanC

EvanC

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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!

#2
delifruit

delifruit

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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.





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