htorres@HAL9000:~$ compiz --replace
Checking for Xgl: present. 
Checking for nVidia: not present. 
Checking for Xgl: present. 
Starting emerald
/usr/bin/compiz.real (core) - Fatal: GLX_EXT_texture_from_pixmap is missing
/usr/bin/compiz.real (core) - Error: Failed to manage screen: 0
/usr/bin/compiz.real (core) - Fatal: No manageable screens found on display :1.0