Re: slow 3D game performance
I'm not sure if this will help, but what about CONFIG_AGP_ATI ?
isn't this "key" (CONFIG_AGP_ATI) supposed to be used for ATI mobo chipset?
try fglrx for debian from flavio stanchina's website. however, you might
have to do some modifications to your kernel (e.g., putting
agp-related stuff as a modules is recommended, see the docs at that page)
For ATI, you have a couple of options: you can use the open-source DRI
drivers, or you can use the "semi-open-source" drivers that ATI has
developed (which are available on their website). Find out which one
you are using, and then try the other one.