启动scribes出错，求教。

[nuoran]

错误信息如下：
nuoran@ubuntu:~$ scribes
Traceback (most recent call last):
File "/usr/bin/scribes", line 79, in <module>
main(argv[1:])
File "/usr/lib/python2.5/site-packages/SCRIBES/Main.py", line 48, in main
__open()
File "/usr/lib/python2.5/site-packages/SCRIBES/Main.py", line 59, in __open
__open_via_dbus(uris)
File "/usr/lib/python2.5/site-packages/SCRIBES/Main.py", line 77, in __open_via_dbus
dbus_service = __get_dbus_service()
File "/usr/lib/python2.5/site-packages/SCRIBES/Main.py", line 121, in __get_dbus_service
from info import dbus_iface, session_bus
File "/usr/lib/python2.5/site-packages/SCRIBES/info.py", line 32, in <module>
session_bus = SessionBus()
File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 217, in __new__
mainloop=mainloop)
File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 106, in __new__
bus = BusConnection.__new__(subclass, bus_type, mainloop=mainloop)
File "/var/lib/python-support/python2.5/dbus/bus.py", line 125, in __new__
bus = cls._new_for_bus(address_or_type, mainloop=mainloop)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute dbus-launch to autolaunch D-Bus session

请各位朋友指点一二，谢谢。

[nuoran]

sudo apt-get install dbus-X11 后能启动起来了，但终端还是会显示如下信息：

** (scribes:12929): WARNING **: Failed to send buffer

** (scribes:12929): WARNING **: Failed to send buffer

这个应该没什么问题的吧？