I'm using NF310 with xfce4.
Session and system objects created fine.
# samsung-tools --backlight toggle
ERROR:dbus.proxies:Introspect error on :1.27:/Device/Backlight: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: 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.
# dbus --monitor
shows the last request is Introspect but no introspection reply.
How this can be?