epoch@darkstar:~/Desktop$ beryl-manager
epoch@darkstar:~/Desktop$ 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:6415): WARNING **: No pidof, this may not work right.

** (beryl-manager:6415): WARNING **: No pidof, this may not work right.

** (beryl-manager:6415): WARNING **: No pidof, this may not work right.

** (beryl-manager:6415): WARNING **: No pidof, this may not work right.

** (xfwm4:6493): WARNING **: Another Window Manager is already running