Traceback (most recent call last):
  File "/usr/bin/unity", line 272, in <module>
    run_unity(args)
  File "/usr/bin/unity", line 190, in run_unity
    unity_instance = process_and_start_unity (compiz_args)
  File "/usr/bin/unity", line 155, in process_and_start_unity
    if run_command == DEFAULT_COMMAND and not options.ignore_session_manager and \
AttributeError: 'Values' object has no attribute 'ignore_session_manager'