I've got a DVI output on my Ti4200 going to a DVI->HDMI connector and
into the back of the TV.  It responds with EDID information when X
starts up and advertises the following - any help or pointers would be
greatly appreciated.
Often, the EDID has to be disabled to convince the card to drive things other than what the TV may (bogusly) reply with. However, in your case...

<snip>
(II) NVIDIA(0): Supported additional Video Mode:
(II) NVIDIA(0): clock: 74.2 MHz   Image Size:  708 x 398 mm
(II) NVIDIA(0): h_active: 1920  h_sync: 2008  h_sync_end 2052 h_blank_end 2200 
h_border: 0
(II) NVIDIA(0): v_active: 540  v_sync: 542  v_sync_end 547 v_blanking: 562 
v_border: 0
<snip>

...convert this into an X modeline, if that's what the TV reported it could do. In otherwords,

Modeline mysooperdoopermode 74.2 1920 2008 2052 2200 540 542 547 562

That's a "540p" mode. For 1080i, you should be able to make it by modifying it to a double-height version of the same thing:

Modeline my1080i 74.2 1920 2008 2052 2200 1080 1082 1087 1102 interlace

Same frequencies, just interlaced, so 2x as many vertical lines.

-Cory

*************************************************************************
* Cory Papenfuss                                                        *
* Electrical Engineering candidate Ph.D. graduate student               *
* Virginia Polytechnic Institute and State University                   *
*************************************************************************

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