nasser@ubuntu:~$ mkdir -p ~/.config/compiz; echo SKIP_CHECKS=yes >> ~/.config/compiz/compiz-manager
nasser@ubuntu:~$ sudo compiz --replaceChecking for Xgl: not present. 
No whitelisted driver found
SKIP_CHECKS is yes, so continuing despite problems.
Checking for texture_from_pixmap: present. 
Checking for non power of two support: present. 
Checking for Composite extension: present. 
Comparing resolution (800x600) to maximum 3D texture size (2048): Passed.
Checking for nVidia: not present. 
Checking for FBConfig: present. 
Checking for Xgl: not present. 
Starting gtk-window-decorator
/usr/bin/compiz.real (core) - Fatal: No GLXFBConfig for default depth, this isn't going to work.
/usr/bin/compiz.real (core) - Error: Failed to manage screen: 0
/usr/bin/compiz.real (core) - Fatal: No manageable screens found on display :0.0