I have a mid-2011 MacBook Air and 2 Dell monitors. A 30 inch (U3014) and a 27 inch (U2711).
I connect a mini DisplayPort to DisplayPort cable from the Air to the 30 inch monitor, and a DisplayPort to DisplayPort cable from the 30 inch to the 27 inch.
The 30 inch powers up as it should, but the 27 inch shows an error message saying that the refresh rate is wrong:
The current input timing is not supported by the monitor. Please change your input timing to 2560x1440@60hz or any other monitor listed timing as per the monitor specifications.
When I check the display settings in OS X, the 27 inch monitor doesn't even show up.
Is this a problem with the Air not being able to power up two displays that large?
Or is there anything I can tweak?
Someone told me the DisplayPort in the Air has a max supported resolution - I may have exceeded that.