I have a GeForce 6800, running AIGLX and the stock FC6 compiz (with
the nvidia non-free driver 9629) - I've pasted my xorg.conf below.
Maybe it will be of use to you. If not, paste yours - maybe someone
with more knowledge can help.
Chris
cat /etc/X11/xorg.conf
# Xorg configuration created by pyxf86config
Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
EndSection
Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"
EndSection
Section "Module"
Load "glx"
Load "dri"
Load "extmod"
EndSection
Section "Device"
Identifier "Videocard0"
Driver "nvidia"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Videocard0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
EndSubSection
Option "AddARGBGLXVisuals" "True"
Option "DisableGLXRootClipping" "True"
EndSection
Section "Extensions"
Option "Composite"
EndSection
#Section "Modules"
# Load "extmod"
#EndSection
