Network Manager not running error on Ubuntu 12.04 (FIXED)

I upgraded my Linux system (Ubuntu Server 12.04 LTS) a few minutes ago. And, my network manager haven't work since. So , if you happen to experience the same error with your network manager, try the following command.

Open your terminal, type:
sudo /etc/init.d/network-manager start

Enter your password at the prompt, and press Enter. That's it. Your Network Manager will start running, and you will have your internet connection back.

This is not a permanent fix. You may required to do this every time you boot the system. 

Comments

  1. Ditto. You wouldn't happen to know how to add Network Manager to the startup programmes would you?

    ReplyDelete
    Replies
    1. You could use gnome-session-properties. It is a startup applications app.

      Delete
  2. Thank you. Been searching for this for hours.

    ReplyDelete
  3. Thanks - I had the same problem - no connection anymore
    booting the system shows error: waiting for network configuration...
    but nothing happens - last but not least: booting network without full network configuration!
    Starting manually in terminal will bring the missing function ;-(

    ReplyDelete
    Replies
    1. I looked into the problem, and found what went wrong. I edited the post with a permanent fix now.

      Delete
  4. my problem is because after an upgrade, the network-manager is running, but, not is possible to select vpns, interfaces, nothing. when push in connection information say no valid connections.

    ReplyDelete
  5. Thank you. I had the same problem. 12.04LTS worked fine out of the box. I ran update manager and rebooted and all networks disappeared.
    The solution provided here worked.
    On my system, /etc/network/interfaces was an empty file.
    Adding the lines:

    auto lo
    iface lo inet loopback

    solved the problem. I just added these two lines to /etc/network/interfaces and rebooted. NetworkManager now starts when the system starts and all my networks function as expected. Maybe the new version of NetworkManager has some dependence on the loopback interface (or needs to ignore it?)

    ReplyDelete
  6. Hi,

    At first I tried what necopost said. That didn't work for me. My problem was solved by Daniel McCue's suggestion. My /etc/network/interfaces file now contains only the following two lines:

    auto lo
    iface lo inet loopback

    I have rebooted only once yet, so I don't know what happens later, but for now my laptop started with the standard network functionalities restored.

    Thanks to both necopost and Daniel.

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  7. thanks!!!!!!!!!!!!!!!

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  8. THANK YOU, YOU'RE GENIUS!!!

    ReplyDelete
  9. thanks, worked fine for me too, after upgrade from 12.04 to 12.10

    ReplyDelete
  10. GREAT! Worked for me!
    thanks...

    ReplyDelete
  11. Excellent post and wonderful blog, I really like this type of interesting articles keep it up.

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  12. Worked perfectly:)
    Thank you

    ReplyDelete
  13. I have an Intel PRO/Wireless 3945ABG Internal network card

    When I ran the code

    sudo gedit /etc/network/interfaces

    I was presented with a file with only two lines of code and a comment:

    # interfaces(5) file used by ifup(8) and ifdown(8)
    auto lo
    iface lo inet loopback

    I'll try and check this file tomorrow morning when I expect that the network connection will have been reset and will nbot be working.

    I normally solve this by inserting a PCMCIA Card in until it is connected the reboot and remove the card and, as if by magic, the wireless connection is fixed for another day!

    I'll let you know.

    ReplyDelete

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