$ compiz --replace && emerald --replace &
[1] 11529
dexter@shodan:~$ Checking for Xgl: not present.
Detected PCI ID for VGA: 02:00.0 0300: 1002:4a4b (prog-if 00 [VGA])
Checking for texture_from_pixmap: not present.
Trying again with indirect rendering:
Checking for texture_from_pixmap: present.
Checking for non power of two support: present.
Checking for Composite extension: present.
Comparing resolution (1600x1200) 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) - Error: Another window manager is already running on screen: 0
/usr/bin/compiz.real (core) - Fatal: No manageable screens found on display :0