On Sun, 10 Nov 2002, Sebastien Devaux wrote:

> My best try to start X directly on TV is resumed here :
> <my XF86Config>
> [...]
> Section "Monitor"
>       Identifier      "TV"
>       HorizSync       15-115
>       VertRefresh     50
>       Option "CrtScreen"
> # pal 768x576 50 Hz ++++
>       Modeline "pTV" 29 768 784 854 936
>               576 582 588 619
> EndSection
> [...]

> Since HFL must be "8 divide-able" I can't match anything between
> those to examples.

I'm not sure that that rule still applies - you could try adding or 
subtracting 4 to HFL.
 
> So to get finest control to Horizontal Freq, I tried to adjust dot
> clock frequency. But, strangely, it seems to have no effect on
> horizontal freq, but just on vertical one : I must adjust VFL
> to get a stable image but, it stays the same.
> 
> All configs I tried to get 640x480 or 800x600 (tring to be as close 
> as possible to 31.5 kHz Hori / 50 Hz vert) are worth.
 
> I tried thousends options, PanelSize, composite_sync, NoDDC... None
> of them had any effect.

You don't mention "Interlace" which is a flag on ModeLine.
PAL TV pictures are interlaced, so that might help, although
the card might be doing that already.

-- 
Dr. Andrew C. Aitchison         Computer Officer, DPMMS, Cambridge
[EMAIL PROTECTED]   http://www.dpmms.cam.ac.uk/~werdna

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