[vdr] [PATCH] RGB/PAL over VGA at variable frame rate

Theunis Potgieter theunis.potgieter at gmail.com
Wed Jul 23 09:41:54 CEST 2008

The xorg.conf options differ for newer versions of the nvidia driver, that
is why mine looks different.

How I picked up on the problem was, when I ran xvidtune on DISPLAY=:0.1
(TV-Out) and found that even when I set the modeline, it still ran @60Hz,
thus showing the tearing effect and had to enable deinterlacer. After
googling for 6 months, I found somebody on a mailing list explaining that
the TV-Out (s-video) could be set to run @50Hz but only with the older
drivers of nvidia and because my card is old it was not a problem. Obviously
this only helps for the TV-Out on nvidia, thus I don't require any
deinterlacers. I use the machine as a home PC on DISPLAY=:0.0. I understand
that your solution helps when using a LCD/Plasma with dvi/d-sub/scart

Just wanted to share my experience with all :) I'm only showing that you can
consolidate your hardware too, if implemented correctly. I only have the 1
pc running in the house and don't see a need to run more. I extend the
svideo/audio/IR cable to the next room. Not really needed now since the pc
runs quiet when the cpu fan stops. Only thing making a noise now is the
already relatively "quiet" power supply. Things that start up the cpu fan is
xvid/divx and firefox (on DISPLAY=:0.0). Taking into account that "live" tv
is also off loaded using xvmc.


On 22/07/2008, Thomas Hilber <vdr at toh.cx> wrote:
> On Tue, Jul 22, 2008 at 08:30:46PM +0200, Theunis Potgieter wrote:
> > currently I'm still using a pentium 4, 2.4GHz machine with nvidia AGP
> 440MX
> > card,
> at least the VGA-to-SCART cable (not yet the patch itself) does run here
> on nVidia hardware without problems. Box is a PUNDIT P1-AH2 with nVidia
> C51PV
> [GeForce 6150] graphics.
> > only way to get that to work properly was with the older nvidia drivers
> > 71.86.0 , apparently the newer drivers forces PAL or any other TV
> Standard
> > to run @60Hz instead of 50Hz, which is what my broadcast is. So I had to
> > "downgrade" the driver to get the proper output.
> really? On my Pundit I use NVIDIA-Linux-x86-100.14.19-pkg1.run and
> the attached xorg.conf with no problems.
> >     Option         "UseEDIDFreqs" "FALSE"
> >     Option         "UseEDIDDpi" "FALSE"
> I just use one big hammer instead:)
> Option "UseEDID" "FALSE"
> That works (mostly).
> -Thomas
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