beryl@Deus-ex-Machina-4b:~$ beryl-manager
beryl@Deus-ex-Machina-4b:~$ **************************************************************
* Beryl system compatiblity check                            *
**************************************************************

Detected xserver                                : XGL

Checking Display :1.0 ...

Checking for XComposite extension               : passed (v0.3)
Checking for XDamage extension                  : passed
Checking for RandR extension                    : passed
Checking for XSync extension                    : passed

Checking Screen 0 ...

Checking for GLX_SGIX_fbconfig                  : passed
Checking for GLX_EXT_texture_from_pixmap        : passed

** (beryl-manager:11327): WARNING **: Beryl caught deadly signal 11