sam@sam-laptop:~$ dbus-send --session --dest=org.freedesktop.compiz --print-reply /org/freedesktop/compiz/core/allscreens/active_plugins org.freedesktop.compiz.get
Error org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.compiz was not provided by any .service files
sam@sam-laptop:~$ sudo dbus-send --session --dest=org.freedesktop.compiz --print-reply /org/freedesktop/compiz/core/allscreens/active_plugins org.freedesktop.compiz.get
Failed to open connection to session message bus: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.