[mythtv-users] Stupid S-Video Problem Continues

[Will Constable]

Yea- my current setup is s-video via homemade cable-40 ft of cat 5 with
s-video and audio connectors at each end, running through the walls- I know,
sounds like a recipe for disaster.  But my laptop drives a perfect signal
from one end to the other while I have this problem with the myth box.  So I
am thinking its either the card or the settings/driver..  I have been using
nvidia instead of nv, but have not tried a whole lot of options for
resolution on my vga port.  I was thinking it would be good to try identical
settings and do a clone, but I don't know how to write xorg.conf for
that-mine does dual screens not using xinerama.  It does occur to me though,
that the setup I have upstairs is 1024x768 on s-video and 1600x1200 on
vga-while the monitor downstairs cant run 1600, maybe this setting would
make the interference go away.  Do you know how to set up xorg for clone?
Also, can I set the horizsync and vertrefresh of my vga monitor to match
what my tv uses, or might this cause a problem?

 

 

Thanks!

 

-will 

  _____  

From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Brian Wood
Sent: Thursday, June 08, 2006 9:45 AM
To: Discussion about mythtv
Subject: Re: [mythtv-users] Stupid S-Video Problem Continues

 

 

On Jun 8, 2006, at 7:11 AM, Will Constable wrote:





I am experiencing what one user described as a winshield-washer effect on my
TV-bars that (depending on the moment) are oriented in a diagonal or
vertical manner and scroll from side to side on the screen.  I have tried
goofing around with the s-video connector-I unplugged VGA and turned off the
monitor and moved the PC to the middle of the room where it might have less
interference form other nearby electronics-no luck . I tried putting a
friend's Geforce 3 in place of my Gefore 4 mx but it wouldn't run the same
xorg.conf I had made and I don't know the ins and outs of the nv driver. I
think my card is causing the problem, but it could be settings like
horizsync and vertrefresh.  I have tv set to h:50-70 and v:60-60.  Does
anyone know about any other 'options' that I could add to the device
settings that might improve image quality?  I would be willing to disable
vga and have only TV out but I don't know how to get my xorg.conf to do
that.  Any help would be great!

 

So do I understand correctly that you running VGA and S-Video at the same
time ? 

 

What you describe is interference between the two video signals of differing
frequencies. If the problem still happens with the cables disconnected then
your problem could well be with your card.

 

The cards are supposed to be designed to be able to do this, but the early
ones especially had some problems.

 

I don't see how it could make a difference, but you might want to try the
nVidia driver instead of the generic nv one. That driver is at least
intended for multiple outputs but I am not sure about the nv one.

 

Running your VGA signal at a different resolution might make the problem
less obtrusive (or worse).

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