Traceback (most recent call last):
  File "/usr/lib/ubuntuone-client/ubuntuone-login", line 40, in <module>
    bus = dbus.SessionBus()
  File "/usr/lib/pymodules/python2.7/dbus/_dbus.py", line 219, in __new__
    mainloop=mainloop)
  File "/usr/lib/pymodules/python2.7/dbus/_dbus.py", line 108, in __new__
    bus = BusConnection.__new__(subclass, bus_type, mainloop=mainloop)
  File "/usr/lib/pymodules/python2.7/dbus/bus.py", line 125, in __new__
    bus = cls._new_for_bus(address_or_type, mainloop=mainloop)
DBusException: org.freedesktop.DBus.Error.NoServer: Failed to connect to socket /tmp/dbus-Fcs8OkRdIR: Connection refused