External monitor questions

Is there some sort of auto overscan setting?

 

What is the exact model number of your monitor, to help my research efforts?

 

Found this on another Apple forum:

RESOLUTION: The resolution options are strange. The monitor defaulted to 1080p which blows the image up beyond the constraints of the monitor. As an example, I moved the menu bar over to the new monitor and you can't see it. The display preferences screen allow you to "underscan" which reduces the image size to fit, but mangles it pretty badly it does. I spend a lot of time at a command prompt and the text rendering was not only unusable, but **** near unreadable. I tried the other options (720p and 1600x900) and they both blew things up with some noticeable distortion. For now, I'm using it at the default 1080p

I bet it's a setting you need to adjust in the monitor control menus. I would look around in there and see what options are available and try some of them.

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What kind of cable are you using from the MBA to the 27xi? Another user of this monitor mentioned that he had tried several different HDMI cables before finding this one and it working perfectly:

http://smile.amazon.com/gp/product/B004CAHTCQ/ref=smi_www_rco2_go_smi_1968490042?ie=UTF8&psc=1&redirect=true&pf_rd_p=1968490042&pf_rd_s=smile-campaign&pf_rd_t=201&pf_rd_i=B004CAHTCQ&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=1SE51CE9XYQNB0XM75B0

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Also, do you have the latest EFI firmware?

http://appleinsider.com/articles/14/06/10/apple-issues-macbook-air-efi-update-to-address-random-reboots-sleepwake-reliability

 

This might be the problem:

Compliant with Mini DisplayPort 1.1a, HDMI 1.3b

I think you would be better off with a cable capable of DP 1.2 and HDMI 1.4, something like this:

http://smile.amazon.com/Accell-B086B-007B-UltraAV-DisplayPort-Adapter/dp/B00F90H7IO/ref=sr_1_3?ie=UTF8&qid=1424654915&sr=8-3&keywords=HDMI+1.4+to+mDP