Comment 8 for bug 279486

here is the trace back....

Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 716, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 911, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.5/site-packages/bzrlib/commands.py", line 547, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.5/site-packages/bzrlib/builtins.py", line 918, in run
    possible_transports=possible_transports)
  File "/usr/lib/python2.5/site-packages/bzrlib/decorators.py", line 192, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/workingtree.py", line 1551, in pull
    possible_transports=possible_transports)
  File "/usr/lib/python2.5/site-packages/bzrlib/decorators.py", line 192, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/branch.py", line 2207, in pull
    _override_hook_target=_override_hook_target)
  File "/usr/lib/python2.5/site-packages/bzrlib/decorators.py", line 192, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/branch.py", line 2029, in pull
    graph=graph)
  File "/usr/lib/python2.5/site-packages/bzrlib/decorators.py", line 192, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/branch.py", line 725, in update_revisions
    overwrite, graph)
  File "/usr/lib/python2.5/site-packages/bzrlib/branch.py", line 2846, in update_revisions
    self.target.set_last_revision_info(stop_revno, stop_revision)
  File "/usr/lib/python2.5/site-packages/bzrlib/decorators.py", line 192, in write_locked
    result = unbound(self, *args, **kwargs)
  File "/usr/lib/python2.5/site-packages/bzrlib/branch.py", line 2381, in set_last_revision_info
    self._run_post_change_branch_tip_hooks(old_revno, old_revid)
  File "/usr/lib/python2.5/site-packages/bzrlib/branch.py", line 875, in _run_post_change_branch_tip_hooks
    hook(params)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/dbus/hook.py", line 46, in on_post_change_branch_tip
    activity.Activity().advertise_branch(params.branch)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/dbus/activity.py", line 71, in __init__
    self.bus = _get_bus(bus)
  File "/usr/lib/python2.5/site-packages/bzrlib/plugins/dbus/activity.py", line 49, in _get_bus
    return dbus.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)
DBusException: org.freedesktop.DBus.Error.Spawn.ExecFailed: dbus-launch failed to autolaunch D-Bus session: Autolaunch error: X11 initialization failed.