Something

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* Beryl system compatiblity check                            *
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Detected xserver                                : NVIDIA

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 ...

Xlib:  extension "GLX" missing on display ":0.0".
Root visual is not a GL visual