[mythtv-users] Stupid overscan question

Devan Lippman devan.lippman at gmail.com
Wed Nov 9 18:42:59 EST 2005


On 11/9/05, chris at cpr.homelinux.net <chris at cpr.homelinux.net> wrote:
>
> On Wed, Nov 09, 2005 at 02:29:42PM -0500, Cory Papenfuss wrote:
> > >Positioning problems are more properly fixed by altering the modeline
> > >timings to reduce the retrace delay.
> >
> > Actually, they're more properly fixed by adjusting the monitor/TV
> > so it doesn't overscan.
>
> My new HDTV has no manual geometry adjustment capability at all. It
> has a "Perfect Picture" feature that automatically detects and corrects
> for signal abberations or projection errors (size, position, keystone,
> focus, colour, etc.), at least in theory. It gives me a perfectly
> adjusted image for every video device I own except when I'm running
> Linux on the XBox, in which case the image is shifted down and to the
> right by a significant amount. The XBox looks perfect when running a
> Microsoft game. That would lead me to conclude that something about
> the video signal generated by the Linux drivers is not only incorrect,
> but far enough off the standard that the TV can't even correct for it.
>
>
>
I believe the nvidia in the xbox was a derivative of the geforce 3 which
AFIK does not support overscanning in the driver. You may be able to use a
tool called NVTV to fix this, doing a search over at sf.net
<http://sf.net>should produce results.

--
Thanks,
Devan Lippman <devan at lippman dot net>
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