iMac 24" with 37" 1080p as Dual Monitor - Help Needed

[Diligo123]

Hey

I recently purchased a miniDVI to VGA adaptor, and set up a dual monitor (37") to my iMac (24"). The problem is, the new monitor is only displaying at 1440 x 900.. i'd like it to be able to show 1920x1080; the actual resolution of the monitor. Any way of doing this? (the maximum resolution in the display preferences is 1440 x 900)

Cheers

 

[spinnerlys]

What happens if you select the maximum resolution of 1920 x 1080 shown in System Preferences > Displays?
Have you deselected MIRROR DISPLAYS under the Arrangement tab?

 

[Diligo123]

Sorry.. mistyped. Edited now The maximum res in the system preferences is 1440 x 900 :/

And I haven't clicked mirroring, I was hoping to use it as an extended display.

 

[Diligo123]

Hmm, just switched the other display on this morning and it was showing at 1920 x 1080.. but one edge of the screen was black and the other edge was missing (in between the 2 monitors)... I detected the displays from the preferences panel, and when it registered, the display had reverted to 1440 x 900, with no option to change it back to 1920 x 1080.