Author: Matthew Poole
Date: 13-01-03 07:59
What tool did you use to set up xfree86?
I have a nvidia tnt2 m64 and it did the same thing using Xfree86config. It gave me the same result, so I tried the ncurses based config tool (the next available choice in /stand/sysinstall in that Configure your Xfree86 Server), and gave it the info it wanted as I went along. I chose 16 bit colour depth & 1024X768 and bingo, it worked liked a charm.
Hope this helps.