The SXRD is displaying the 1920x1080, the edges are just being masked by the cabinet. Its just more noticable in this application because we know where the dock and menubar should be located on the screen. If Sony didn't intentionally overscan the picture on its rear-projection sets, small variances in the geometry of the mirrors and lenses inside would be very noticeable (i.e picture doesnt fill the screen, pincushion, etc). This is differnet than LCDs/Plasmas in which the pixels have a fixed area to be displayed. 1840x1020 just limits OS X to the viewable pixels.
The default apple preferences I believe you are talking about are 'Overscan' and 'Best for Video'. During the handshake (information passed from the TV to OS X telling it what kind of display it is), DisplayConfigX sort of 'intercepts' the SXRD from telling OS X that it is a TV and forces OS X to treat it is a standard monitor, which is why we can adjust the resolution.
You can reset the original Apple options by clicking 'Uninstall' under the Install tab of OS X. Either reboot (or unplug the hdmi cable of the monitor for a few seconds) and you are back to before. Of course the resolutions you set in DisplayConfigX will no longer be options.
My screen bows down about a half inch from left to right on both the top and bottom, which I think is due cabinet flex resulting from two things - the weight of the center speaker perched on top (pushing down the center), and the TV hanging about 4" off the back of the cabinet (weight of set isn't evenly distributed) . I'll have to live with it until this fall when I build a new cabinet.
A far as picture quality - I just don't think the Mac handles deinterlacing properly. Playing TV shows on DVD, even on my laptops screen, looks marginal. Sources progressive from the start (like the Quicktime HD trailers), have to be converted to interlaced, which I don't think my MacBooks integrated graphics card handles well. It's those same TV shows that look better via the 1020i output, so who knows.
The Sony DVD player via HDMI slightly 'underscans' causing the bowing to be very noticeable on full-screen DVD's - I have to set the 'overscan' option on the SXRD to +1 to eliminate the problem. Which makes me feel that if Sony can't even get two of it's products released the same year to work properly, how can I expect perfection from my Mac?
What model Mac are you using?
Originally Posted by grubavs
So, it worked as advertized. However, if I use 1920x1080i, the desktop is well off the screen. So I RTFIed the DisplayConfigX website, and what it seems to say is that if 1920 doesn't fit, then make it smaller... which I assume is what you did to come up with the 1840x1020i (yeah, I know I can be pretty dense some times
). I guess I still don't understand why, if the Mac is putting out the resolution the SXRD is supposed to be most happy with, the froggin' thang doesn't fit
Anyway, my new problem (or at least my problem that is now noticable since my desktop fills the screen
) is that my screen is not rotationally correct... the top left corner is overscanned vertically(i.e., off the top of the screen), while the top left corner is underscanned vertically, and the bottom corners are correspondingly out of wack (I guess the good news it the the screen seems to be squared... 90° corners). I bet that's a thing to tweak in the menu. Do you know???
Also, DVDs look better to me using Apple's Display Pref and checking that button the says something about improving moving pictures (I can't remember exactly what it was called, and it's no longer available with DisplayConfigX installed) so maybe that's why you prefer your DVD player over the Mac. King Kong definitely is not as clear during the fast-motion scenes as it was prior to installing DisplayConfigX.