problems to upgrade to 22

[Frank White]

Hi,
I have some problems to upgrade to 22.
Here are the errors:

[root at localhost ~]# dnf system-upgrade reboot
Error getting authority: Error initializing authority: Error calling
StartServiceByName for org.freedesktop.PolicyKit1:
GDBus.Error:org.freedesktop.DBus.Error.TimedOut: Activation of
org.freedesktop.PolicyKit1 timed out (g-dbus-error-quark, 20)
Failed to start reboot.target: Connessione scaduta
Traceback (most recent call last):
  File "/bin/dnf", line 58, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 174,
in user_main
    errcode = main(args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 60, in main
    return _main(base, args)
  File "/usr/lib/python2.7/site-packages/dnf/cli/main.py", line 112, in _main
    cli.run()
  File "/usr/lib/python2.7/site-packages/dnf/cli/cli.py", line 1091, in run
    return self.command.run(self.base.extcmds)
  File "/usr/lib/python2.7/site-packages/dnf-plugins/system_upgrade.py",
line 434, in run
    self._call_sub("run", extcmds)
  File "/usr/lib/python2.7/site-packages/dnf-plugins/system_upgrade.py",
line 442, in _call_sub
    subfunc(*args)
  File "/usr/lib/python2.7/site-packages/dnf-plugins/system_upgrade.py",
line 541, in run_reboot
    reboot()
  File "/usr/lib/python2.7/site-packages/dnf-plugins/system_upgrade.py",
line 106, in reboot
    check_call(["systemctl", "reboot"])
  File "/usr/lib/python2.7/subprocess.py", line 540, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '[u'systemctl', u'reboot']'
returned non-zero exit status 1

I have also found those in the boot log:

[FAILED] Failed to start Authorization Manager.
See "systemctl status polkit.service" for details.

so that I have typed:

[root at localhost ~]# systemctl status polkit.service
� polkit.service - Authorization Manager
   Loaded: loaded (/usr/lib/systemd/system/polkit.service; static;
vendor preset: enabled)
   Active: activating (start) since lun 2016-01-04 12:12:11 CET; 35s ago
     Docs: man:polkit(8)
 Main PID: 1562 (polkitd)
   CGroup: /system.slice/polkit.service
           └─1562 /usr/lib/polkit-1/polkitd --no-debug

Thank u for any help.
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