For some reason, my new Ubuntu 14.04 Desktop machine always starts disconnected from the network. I'm quite sure I did something to the Network Manager when putting it on a static IP address.

After a reboot, I go into the Network control panel and turn it on, and everything is okay. Same situation if I restart the Network-manager service.

Looking for suggestions on where to check for the setting.

  • I checked /etc/NetworkManager/NetworkManager.conf and managed=true
  • I checked /var/lib/NetworkManager/NetworkManager.state and NetworkingEnabled=true

I'm running this as a VM so there's no WiFi or anything; networking comes back fine as soon as I connect via the control panel.


  • 1
    Try to run a nm-connection-editor. Edit the connection you want to have and in General tab switch on "Automatically connect to this network when it is available". – nobody Feb 11 '16 at 6:40
  • I think you are on the right track. The eth0 (ifupdown) connection is grayed out for editing. Checking via the Network connection manager panel, I see that the check box is unchecked (but grayed out). I will look for another way to set it. – Matt Coblentz Feb 11 '16 at 15:00

Note to self: make sure that the router is also set to reserve the static IP address. Once I updated the router (which I had forgotten to do), everything worked like a charm.

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