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Old 07-13-07, 07:05 AM   #13
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Location: South Carolina, USA
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Default Re: Tried and true HDTV 1080i settings?

You're on the right track now. If it helps here's the relevant portion of my xorg.conf file. I run 3 distros (rpm & Deb) and it works in all.

Section "Monitor"
Identifier "Monitor0"
ModelName "Panasonic PTV"
HorizSync 15.0 - 34.0
VertRefresh 59.0 - 61.0
ModeLine "1664x904i" 57.0 1664 1696 1864 2064 904 905 908 920 +hsync +vsync interlace
Option "DPMS"

Section "Device"
Identifier "Videocard0"
Driver "nvidia"
Option "ModeValidation" "NoVertRefreshCheck"
Option "ExactModeTimingsDVI" "FALSE"
Option "NoPredefinedModes"
Option "FlatPanelProperties" "Scaling = Centered"
Option "DPI" "100x100"
Option "AddARGBGLXVisuals" "True"
Option "DisableGLXRootClipping" "True"

Your observation about WinXP is true. This modeline was generated in XP with Powerstrip, and was "inside" the standard 1080i timings that my display prefers. Then moved over to Linux. The "scaling=centered" options prevents overscan. (Note: the "AddARG..." and "DisableGLX...." are for Beryl; not relevant to simply getting 1080i.)
Note that the "workaround" is basically passing analog through DVI. Not all DVI cables & TV ports will do this. See Wikipedia > DVI for details.
Good luck.
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