X Windows Problem?
In Slack 9 I have a nVidia GeForce 4 MX440 with the latest drivers currently, but I used VESA before that and had same problem, and the display is vibrating when running X. The sides of the screen are vibrating horizontally about a half centimeter. This doesn't happen when X isn't running and all I have is CLI. I've not seen this problem in SuSE or Red Hat or any Windows on this system.
I've doublechecked vertical and horizontal ranges for my monitor and tried multiple resolutions.