xsacha@xena:~$ beryl --use-copy
**************************************************************
* Beryl system compatiblity check *
**************************************************************
Detected xserver : AIGLX
Checking Display :0.0 ...
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 ...
libGL warning: 3D driver claims to not support visual 0x4b
Checking for GLX_SGIX_fbconfig : passed
Checking for GLX_EXT_texture_from_pixmap : passed
Checking for non power of two texture support : passed
Checking maximum texture size : passed (2048x2048)
libberylsettings: Couldn't get vtable from '/usr/lib/beryl/libshowdesktop.so' plugin
libberylsettings: Couldn't get vtable from '/usr/lib/beryl/libsnow.so' plugin
libGL warning: 3D driver claims to not support visual 0x4b