Originally Posted by Mr B
The monitor that has the stripes is the only one i got that actually has the option to change the pixel clock. It also has a "auto-detect" mode, that, needles to say, doesn't work that well, and leaves it with these vertical lines.
Often, the auto-detect function works best if it has a signal with sharp transitions in them. When I need to adjust an LCD monitor optimally, I usually create a background image which has alternating black and white pixels for example a 2x2 px image like this one:
I set it as a background image, set it to tile and I have the entire screen filled with a chessboard pattern. The autodetect function usually works fine with this image, but if it doesn't, fiddle with the adjustments and you will quickly see the impact of what you're doing as any interference patterns will be very visible.