Last week I found a great deal on a 2009 mini in really good condition so I picked it up to use as an HTPC. After adding 4GB of RAM, a reformat, clean install of SL and then Lion its running like a champ. The only problem Im having is solving an overscan/underscan issue. When I have it plugged in to my 32 720p TV through Mini DP -> HDMI, if I have the overscan option selected the edges get cut off, but if I dont have it selected the entire image is very small. I have messed around with the options on my TV and the Mini and no matter what I do, I cant get it to display at the right resolution. I tried SwitchResX as well, but I could never get it to work right. The Mini looks great when connected via Mini DP -> VGA, but that defeats the purpose of what I want to use it for, as I cant play any of my HD iTunes content due to HDCP. I think the problem is that my Mini is missing the underscan slider in the display preferences. When I connected my 2010 11 MBA to my TV I had the same problem as my Mini, but the MBA has a nifty little underscan slider that can solve the problem of the cut off edges. This slider is not on my Mini, however, and Ive hooked it up to two other monitors and it never shows up even though its there on my MBA. After a little bit of searching online I found that this slider seems to have been new to SL and solved a lot of the overscan issues, but it is completely missing from my system. Does anyone have any idea as to why the underscan slider is missing? Is there a way to enable it? Or is my only option SwitchResX? Thanks in advance for any help!