tomcat@oro:~/Desktop$ dbus-monitor --session type=signal
signal sender=org.freedesktop.DBus -> dest=:1.73 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameAcquired
   string ":1.73"
signal sender=org.freedesktop.DBus -> dest=(null destination) path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameOwnerChanged
   string ":1.74"
   string ""
   string ":1.74"
signal sender=:1.17 -> dest=(null destination) path=/org/gnome/ScreenSaver; interface=org.gnome.ScreenSaver; member=SessionIdleChanged
   boolean true
signal sender=:1.17 -> dest=(null destination) path=/org/gnome/ScreenSaver; interface=org.gnome.ScreenSaver; member=ActiveChanged
   boolean true
signal sender=org.freedesktop.DBus -> dest=(null destination) path=/org/freedesktop/DBus; interface=org.freedesktop.DBus; member=NameOwnerChanged
   string ":1.74"
   string ":1.74"
   string ""
signal sender=:1.17 -> dest=(null destination) path=/org/gnome/ScreenSaver; interface=org.gnome.ScreenSaver; member=SessionIdleChanged
   boolean false
signal sender=:1.17 -> dest=(null destination) path=/org/gnome/ScreenSaver; interface=org.gnome.ScreenSaver; member=ActiveChanged
   boolean false