Comment 8 for bug 1087457

Same problem with precise-proposed, the xorg-edgers PPA enabled and Radeon HD6870, but some line numbers are different in the first stack trace.

Traceback (most recent call last):
  File "/usr/bin/jockey-text", line 128, in <module>
    sys.exit(u.run())
  File "/usr/lib/python2.7/dist-packages/jockey/ui.py", line 421, in run
    self.list()
  File "/usr/lib/python2.7/dist-packages/jockey/ui.py", line 477, in list
    i = self.backend().handler_info(h_id)
  File "/usr/lib/python2.7/dist-packages/dbus/proxies.py", line 145, in __call__
    **keywords)
  File "/usr/lib/python2.7/dist-packages/dbus/connection.py", line 651, in call_blocking
    message, timeout)
dbus.exceptions.DBusException: org.freedesktop.DBus.Python.TypeError: Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 751, in _message_cb
    _method_reply_return(connection, message, method_name, signature, *retval)
  File "/usr/lib/python2.7/dist-packages/dbus/service.py", line 254, in _method_reply_return
    reply.append(signature=signature, *retval)
TypeError: Expected a string or unicode object