> I've almost got my Mythtv picture perfect, with a little help
> from xvattr and nvidia-settings. The last step is to get the
> FX5200 card to output a WSS signal to make the TV go into
> widescreen mode. Anyone know how?
>
For me the trick was to use a modeline that was 16:9 by design. Unfortunely
mythtv does not seem to recognize this so I also had to add a explicit
definition of the screen size and now everything works as expected. I just
wish there was a way to automatically detect the formal of of the 4:3 versus
letterbox broadcasts and to switch mode when letterbox is detected. This
problem will iron itself out as the stations all switch to the new
standards.
I have attached parts of my xorg.conf file for clarity. If the modeline
numbers look confusing it is because I am using a resolution-in-a-resolution
which scales the picture to perfectly fit my screen while maintaining the
timings required by my monitor. The biggest pain was geting the overall
timing correct so that I had a stable picture that my monitor would accept.
After that it was simply a matter of playing with the visible portion of the
picture and the sync pulse timings to get everything where it should be. I
overscan by about 6 pixels so that the edges of the picture are not visible.
I do not use any overscan features of myth. I find I get a MUCH better
picture doing it this way. With kernel deint turned on I get a better
picture than my monitor produces with its own scaling features.
-------------------------
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "RGB-hv hi-def monitor/tv"
HorizSync 31.0 - 77.0
VertRefresh 55.0 - 120.0
#Option "dpms"
Option "NoLogo" "1"
Option "NoDDC" "1"
#Option "RenderAccel" "1"
ModeLine "540" 37.26 824 944 1048 1104 468 514 528 563 +hsync
+vsync
EndSection
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "540"
Virtual 824 468
EndSubSection
EndSection
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