[mythtv-users] Semi-OT: Help with modeline generation

[Nate Thompson]

I recently purchased a Samsung HLR4667W widescreen DLP television and
have been trying to get my MythTV box to work nicely with it via its
VGA input. Since the monitor's native resolution is 1280x720, I used
the following modeline to generate a decent picture:

1280x720 74.863 1280 1360 1488 1664 720 723 730 750

While that displays a very nice picture, it is overscanned both
horizontally and vertically. Using Powerstrip, I was able to eliminate
most of the horizontal overscan after generating this mode:

1280x720 79.159 1280 1424 1552 1760 720 723 730 750

Now, I need to create a "resolution within a resolution" to eliminate
most of the vertical overscan, but I'm at a loss to do so. Following
the instructions on the AVS Fourm link found in Jarod's HDTV FAQ,
every mode that I try to create results in my display saying that the
mode is not supported. I've determined that a 1228x690 mode should fit
the display almost perfectly, but can't get it to work. Any of the
modeline experts on this list care to give me a hand?

Thanks,

Nate