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* Beryl system compatiblity check                            *
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Detected xserver                                : XGL

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

libberylsettings: Couldn't get vtable from '/usr/lib/beryl/libdbus.so' plugin
beryl-xgl: Another composite manager is already running on screen: 0
beryl-xgl: No manageable screens found on display :0.0