epoch@darkstar:/usr/X11/lib$ beryl-manager
epoch@darkstar:/usr/X11/lib$ sh: xvinfo: command not found
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Error: couldn't find RGB GLX visual
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".

** (beryl-manager:6137): WARNING **: No pidof, this may not work right.
emerald: error while loading shared libraries: libwnck-1.so.18: cannot open shared object file: No such file or directory

** (beryl-manager:6137): WARNING **: No pidof, this may not work right.

** (beryl-manager:6137): WARNING **: No pidof, this may not work right.

** (beryl-manager:6137): WARNING **: No pidof, this may not work right.
kwin: Fatal IO error: client killed
No window manager. Waiting...
sh: xvinfo: command not found
sh: xdpyinfo: command not found
**************************************************************
* Beryl system compatibility check                           *
**************************************************************
sh: xvinfo: command not found

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
New Window Manager
Window Manager "beryl"
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
beryl: glXCreateContext failed
beryl: Failed to manage screen: 0
beryl: No manageable screens found on display :0.0

** (beryl-manager:6137): WARNING **: No pidof, this may not work right.

** (beryl-manager:6137): WARNING **: No pidof, this may not work right.

** (beryl-manager:6137): WARNING **: No pidof, this may not work right.

** (beryl-manager:6137): WARNING **: No pidof, this may not work right.

(xfce-mcs-manager:6180): libxfce4mcs-CRITICAL **: mcs_manager_add_channel_from_file: assertion `filename != NULL && strlen (filename) > 0' failed