External hdmi 1080i vs 1080p

1) try as I might, the MBA only gives choices up to 1920x1080 (interlaced) and does not give an option for 1080p on an external monitor.
2) is there a published specification for the MBA which specifically states that 1080p is NOT available? Everything I have found simply states "1920x1080" without specifying interlace/non-interlace.
thanks for any pointers.

Thanks for the suggestion. I just tried it with two different external monitors with the same results: (1) the pull down menu does have two separate 1920x1080 choices (as you noted) neither is designated 1080i or 1080p -- when one is selected, the monitor reports 1080i, when the other is selected the monitor reports 1080p !
next question(s): (1) why is the "prefs" UI broken? (2) why does the drop down menu fail to distinguish between 1080i and 1080p ?
Message was edited by: mysticybiq

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We solved our scattered image resolution problem on our new 46" SHARP LCD monitor running on a mini mac (Thanks to BSteely's recommendations).
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Thanks for the ideas.
I did as you suggested, but the only 1920x1080 selection shown was one for "NTSC" which I would think is interlaced. This was after a reboot. All of available resolutions are labeled with "NTSC". When I look at the screen resolutions on my MacBook Pro when it is connected to the TV, they are labeled as "Interlaced". On both computers there are no progressive scan selections.
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If there was a less aggressive Overscan mode or more aggressive normal mode, that would fix the issue.
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External hdmi 1080i vs 1080p

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