pasquale@pasquale-desktop:~$ compiz -v -d
Checking for nVidia: present. 
Checking for Xgl: not present. 
Checking for FBConfig: present. 
Checking for texture_from_pixmap: present. 
Checking for non power of two support: present. 
Checking for Composite extension: present. 
Checking for XDamage extension: present. 
Checking for XSync extension: present. 
Detected 1 screen(s)
Checks indicate compiz should work on your system
Found running windows manager: metacity
Setting fallback windows manager to metacity --replace
Starting delayed decorator in the background: sleep 3 && gtk-window-decorator --replace &
Loading the ccp settings interface
Exporting: __GL_YIELD=NOTHING  
Executing: /usr/bin/compiz.real --loose-binding --ignore-desktop-hints ccp 
pasquale@pasquale-desktop:~$