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Erasmus

macrumors 68030
Original poster
Jun 22, 2006
2,757
301
Australia
Hello Everyone,

I've had a 27" Dell monitor (1440p) for a while now (2 years?), and I just bought a mini-DisplayPort to DisplayPort cable so I can use it with my old 2011 17" MBP as a second monitor.

The problem is it only seems to work when it's showing 16x10, but just remains black when I switch to 16x9, which is the true aspect ratio of the screen.

For example, it shows 1600x1200 fine (but stretched and blurry) but will not show 1600x900.

It is detected, and I can move windows and the cursor onto it, it just doesn't display anything.

My computer should be able to drive the monitor at the full 2560x1440 resolution, but I'm very confused as to what is going on.

Thanks for any help.
 
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