Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/softwareproperties/gtk/SoftwarePropertiesGtk.py", line 1080, in on_driver_restart_clicked
    subprocess.call(['/usr/lib/indicator-session/gtk-logout-helper', '--shutdown'])
  File "/usr/lib/python3.3/subprocess.py", line 520, in call
    with Popen(*popenargs, **kwargs) as p:
  File "/usr/lib/python3.3/subprocess.py", line 820, in __init__
    restore_signals, start_new_session)
  File "/usr/lib/python3.3/subprocess.py", line 1438, in _execute_child
    raise child_exception_type(errno_num, err_msg)
FileNotFoundError: [Errno 2] Arquivo ou diretório não encontrado: '/usr/lib/indicator-session/gtk-logout-helper'