I'll keep it short:
I have the following system:
-Abit VA-10 motherboard, featuring KM400/VT8235 chipset
-NVidia GeForce 6600GT AGP card
-Gentoo Linux with 2.4 kernel
My question is: do I need to install the unichrome drivers to use the 3D acceleration of the AGP card? If not, what do I need?
No, you don't need the Unichrome drivers at all, you need the stuff for your NVidia card instead. (Well, that's my understanding anyway.)
All right, thanks for confirming this.
Now let's hope there is some magic combination of NVidia drivers and settings that doesn't toast my kernel up to the 'no-response-to-ping' level...
Well, on Gentoo, `emerge nvidia-kernel nvidia-glx` might be just about enough.
Not really, I had to emerge the 'unstable' nvidia drivers because the 6600GT really wasn't supported (I only managed to get total system freezes):
ACCEPT_KEYWORDS="~x86" emerge '=media-video/nvidia-kernel-1.0.6629-r1' '=media-video/nvidia-glx-1.0.6629-r1'
Now it works, but not perfectly: every time I quit an application which uses openGL, the kernel freezes with blinking keyboard lights, but I guess this is why these drivers aren't in the stable portage tree yet...