Because I wanted to connect a GSM modem in Raspberry PI, I installed network-manager-gnome Does anybody know why the following messages appears after I set-up any connection?

Connection activation failed (32) Not authorized to control networking...

Maybe the old network manager is still in place. If this is true, how can I remove it?

(EDIT) The answer given here is not working for me.

  • it is not really a duplicate of this question, but you can find your answer here. May 10, 2015 at 9:55
  • I found that question / answer but is not working for me.
    – nucandrei
    May 10, 2015 at 10:36


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