Perhaps a problem with AGPGART?
I've been struggling to figure out why my RH9 desktop seems so sluggish, especially compared to similar boxes with comparable graphics cards. I stumbled upon an interesting message in the output of dmesg:
0: nvidia: loading NVIDIA Linux x86 nvidia.o Kernel Module 1.0-4496 Wed Jul 16 19:03:09 PDT 2003
Linux agpgart interface v0.99 (c) Jeff Hartmann
agpgart: Maximum main memory to use for agp memory: 816M
agpgart: unsupported bridge
agpgart: no supported devices found.
0: NVRM: AGPGART: unable to retrieve symbol table
Admittedly, I'm not entirely sure what agpgart is, but this certainly looks suspicious. Any ideas?