abhinay@gentoo ~ $ beryl-manager 
abhinay@gentoo ~ $ **************************************************************
* Beryl system compatiblity check                            *
**************************************************************

Detected xserver                                : AIGLX

Checking Display :0.0 ...

Checking for XComposite extension               : failed

No composite extension
beryl: No composite extension
Window manager warning: Lost connection to the display ':0.0';
most likely the X server was shut down or you killed/destroyed
the window manager.
**************************************************************
* Beryl system compatiblity check                            *
**************************************************************

Detected xserver                                : AIGLX

Checking Display :0.0 ...

Checking for XComposite extension               : failed

No composite extension
beryl: No composite extension
Window manager warning: Lost connection to the display ':0.0';
most likely the X server was shut down or you killed/destroyed
the window manager.
compiz: No composite extension