/usr/bin/compiz.real: Unknown option '--no-fbo'
/usr/bin/compiz.real: Screen 0 on display ":0.0" already has a window manager; try using the --replace option to replace the current window manager.
/usr/bin/compiz.real: No manageable screens found on display :0.0
Window manager warning: "" found in configuration database is not a valid value for keybinding "toggle_shaded"
Window manager warning: Screen 0 on display ":0.0" already has a window manager; try using the --replace option to replace the current window manager.