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DISPLAY=:0 beryl --force-nvidia --skip-gl-yield
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* Beryl system compatiblity check                            *
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Detected xserver                                : NVIDIA

Checking Display :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
Checking for non power of two texture support   : passed
Checking maximum texture size                   : passed (4096x4096)

Reloading options
beryl: dbus_bus_get error: Failed to execute dbus-launch to autolaunch D-Bus session
beryl: Plugin 'dbus':initDisplay failed
beryl: Couldn't activate plugin 'dbus'
Couldn't initialise dbus. This should not happen!