sorry i didn't notice that you have geforce in apg port, i thought that you installed the driver becouse of nforce2 chipset and that u have in agp slot some other griphic card which is not supportet by the driver
i found this in your dmseg:
"PCI: No IRQ known for interrupt pin A of device 00:02.0. Please try using pci=bi
osirq." i don't now what that mean but it look strange for me.
have u been trying to unplug some devices or maybe switch something in bios on/off? u can always change your distro it sometimes hepls.