LCD Monitor showing strange diagonal lines.

[[sinz]]

I've got a 19" Sony SDM-HS93 running off a VisionTek GeForce3. I tend to use dark backgrounds for things and when I do I sometimes see thick white lines moving back and forth across the screen. They aren't bright white, but rather lighter than the color that is being displayed. It's almost as if they were scanlines or something. I'm not sure if this is an issue with the card or the monitor or whether it's just normal behavior of LCD monitors. If I look VERY hard i can see them at all times on dark backgrounds but sometimes they're a little brighter than others. I'm not positive that this is gentoo related but I use a KVM switch and one of my boxes runs windows and I didn't notice the lines. The relevant xorg.conf sections are as follows:

[Birtz]

Hi,

Why are you using manual timings for your monitor? It should be EDID compatibile. Regardless, if it isn't for KVM switch, I would suggest to correct Monitor section as;