Activer compiz ubuntu

Bonjour,

Je voudrais activé compiz mais ca ne marche pas, les pilotes nvidia sons bien installer pourtant...

bruno@ubuntu:~$ glxinfo | grep rendering
direct rendering: Yes

Donc j'ai tenter de faire compiz -replace en user ca ne marche pas et en sudo ca donne ca.

bruno@ubuntu:~$ sudo compiz --replace &
[2] 4097
/usr/bin/compiz: 57: xprop: not found
bruno@ubuntu:~$ Checking for Xgl: /usr/bin/compiz: 420: xvinfo: not found
not present. 
xset q doesn't reveal the location of the log file. Using fallback /var/log/Xorg.0.log 
Detected PCI ID for VGA: 
Checking for texture_from_pixmap: present. 
Checking for non power of two support: present. 
Checking for Composite extension: /usr/bin/compiz: 420: xdpyinfo: not found
not present. 
aborting and using fallback: xterm 
no xterm found, exiting

Pouvez vous m'aider?