Maybe a detailed explanation of the xorg file and what it does would be a good idea. Which features do what and how it should be structured. Then a path to the xorg0.log file would be a good idea to see if you have any errors.
Yes Andrew, by default most TV's should support native 1:1 pixel mapping and why they do not for the life of me I cannot understand.
Most Edid reports are completely braindead and 99.9% of the time they conflict with themselves and the modes that it actually supports, IE I can do this mode BUT it is outside of the TV's max either H or V refresh SO I really do not support it, but I thought I would let you know anyhow.
Another note that I am not sure you guys maybe aware of but if you use the :
Option "UseEDID" "FALSE" In most cases it will disable HDMI audio. I am not sure if this is the case with the newest 185.13 driver or not, but it is in 180.22 - 180.37 and you must use
Option "ModeValidation" "NoEdidModes" - This can be a grouped line of options as well.
This is a long read, but this helped me immensely on figuring out custom xorg options and configurations and If you do it for your own TV then you will have your custom modelines for anything you want to display on that particular TV. It will even guide you throught nudging the screen size in and out to compensate for oversacnning or underscan if you are not using the NVIDIA Option in your xorg.http://ubuntuforums.org/showthread.php?t=1003099&page=2