External Monitor Overscan

Mac Technical Support
I am currently using a 24" Dell 1080p monitor connected to my Late 2011 MBP 15" 2.4GHz via HDMI, and when I am both in the menus and in-game, there is overscan (i.e. the full image is cut off). The underscan slider is set to Off in the OS Display settings (as no adjustment was needed). I tried 16:9 resolutions other than 1920x1080, and they display correctly. Also, adjusting the underscan in the OS Display settings by trial and error, but it seems that 1920x1080 isn't displaying at exactly 16:9 (the best I could do was having two thin blank bars on either side of the image, with the vertical component being correct).

For now, I will just play at a lower resolution, but I thought this might need to be flagged as an issue.

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