old monitor can't handle 800x600 on nv.o

[cdummy]

I have installed Bonzai Linux (Debian based) on machine with 14' monitor that can handle 640x480 and 800x600. System is Duron 1300 with nvidia 32 MB video card. The only resolution I can get is 640x480 with nv module. If I try 800x600 I'm getting scrambled screen. I tried to use Knoppix to figure this out. If I boot Knoppix without argument I'm getting scrambled screen even when Knoppix boots and in X. When I boot with argument "fb800x600 boots no problem and X starts in 800x600 mode. I presume that all that has something to do with frame buffer. So I tried XFree86(fbdev) server can't boot to X. I tried with fbdev enabled in kernel and with fbdev disabled in kernel. I tried also vesa - no luck. I'm installing Bonzai Linux because:
1. Boots into vga mode with no problem no need for extra arguments.
2. I have 800MB hdd to put whole distro.
Anybody has any ideas? Thanks for help.
Andrey

[cdummy]

Success. Once I put values from XFree86.0.log(Knoppix);
35.2 and 56.2 I have 800x600 resolution almost no problem. Screen is moved an inch to the left:
there is black stripe on the left side of the monitor. I can adjust this with the monitor. Can this be adjusted other way?
Andrey

[psi42]

If knoppix works fine, copy the knoppix XF86Config-4 to your install. It will work. The only thing you may need to modify is the font paths.