Originally posted by bwkaz
There is a thread here regarding the KT400 motherboard chipset. In short, yes, that is your problem. There are options you can pass to the kernel module, or you can disable AGP, to work around the problems.
I believe this issue is also noted in the errata for the 4349 driver -- the errata is available on nVidia's FTP site, and I believe it's also linked from the driver download page.
I looked at the errata, but that can't be the problem, because I have NvAGP disabled! and it is still not working, plus: my GeForce2 MX400 is working only on 4x. I have set that in the BIOS.
can you help me?