Here's my problem:

I boot from the DVD, and get the penguin pictures and system messages. And then the screen goes black, then starts to flicker, and then I get the message "INVALID SCAN FREQ." Then, after doing a hard reset, I briefly get the message "INVALID SYNC".

I tried the cheat code "knoppix vsync=60 hsync=80" - it didn't work. I tried various other values besides "60" and "80". I tried setting the resolution to 1280x1024. I'm not sure what else to do.

Monitor: Gateway VX900 CRT, connected to the computer through a VGA-DVI adapter. I usually use the resolution 1280x960, but it displays anything up to 1600x1200 (including 1280x1024) fine under Windows. I'm not sure how to check for the refresh rates it allows.

Computer: Asus P5B Deluxe motherboard, 1.86GHz Intel Core 2 Duo processor, 512MB Nvidia GeForce 7950GTOC graphics card, 2GB ram.

Any help would be greatly appreciated.