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I'm having problems with connecting my retina MBP with external displays of all kinds. The DisplayPort->VGA adapter has a 1/4 success rate. The HDMI port (via a DVI adapter) does not see my monitor.

These monitors all work with every other laptop (Mac, Windows and Linux), including my old pre-unibody MBP. Worst of all, I cannot depend on this laptop to make presentations, because it's often failed to connect to projectors.

How can I debug these problems? I don't see any obvious way to resolve issues when automatic discovery fails.

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Has it ever worked in the past or did you have these problem right out of the gate when getting the machine? If it hasn't worked at all, it's probably a hardware issue. – Jannemans Mar 19 '13 at 7:36
It's worked with some monitors, just not the majority. – Adam Mar 19 '13 at 17:51
But the question stands, is there a way to debug/get error messages/try manually? Or is the automatic system the only way? – Adam Mar 19 '13 at 17:52

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