lontra@debian:~$ compiz-manager
Checking for Xgl: 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: 00:02.0 0300: 8086:27a2 (rev 03) (prog-if 00 [VGA])
Checking for texture_from_pixmap: present. 
Checking for non power of two support: present. 
Checking for Composite extension: present. 
Comparing resolution (1280x800) to maximum 3D texture size (2048): Passed.
Checking for nVidia: not present. 
Checking for FBConfig: present. 
Checking for Xgl: not present. 
Starting emerald
/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