Hey, I just did a hd install of knoppix, but i've noticed that the quality of my display is very poor (ie: text is all choppy, etc). The control center tells me my refresh rate is set at 70 Hz, but it should be set at 60. The control center won't allow me to change it however. I was just wondering how I can fix this problem. I've tried other distributions with KDE and haven't had this problem with any of them.

Thanks