I've used Compiz Fusion on several ATI and Nvidia video cards. When using an Nvidia with the latest driver, here are the options I set after installing the driver:
Code:
nvidia-xconfig --composite
nvidia-xconfig --render-accel
nvidia-xconfig --add-argb-glx-visuals -d 24
With the latest Nvidia driver, I'm not enabling AIGLX, but I'm also not turning on Xgl.
After restarting X, I check that the correct driver is loaded:
Code:
glxinfo | grep rend
(Ensure it's Nvidia and not Mesa.)
And also check that composite is enabled:
Code:
cat /var/log/Xorg.0.log | grep -i comp
If all is OK, I start compiz-manager to enable Compiz. I add compiz-manager to my Gnome sessions options for auto startup.
HTH.