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Thread: Dell precision M4700: Wireless failed after ubuntu 12.04 updating

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  1. #1
    Join Date
    Feb 2013
    Beans
    14

    Angry Dell precision M4700: Wireless failed after ubuntu 12.04 updating

    Hello everybody,

    hope somebody can help.
    I am working on a Dell precision M4700 laptop with Ubuntu 12.04 and KDE desktop.
    After a "suggested" system updating, my wireless connection stops working. KNetWorkManager sees the wireless and tries to connect to it but, after a while, a small windows pops up and asks for a password. If I introduce the wireless one I have it tries again but nothing happens. That window appears again and again asking for a password.
    Such windows has a key as a symbol on the top left corner, the same key appears over the KNetWorkManager symbol which is on the bottom panel. The window has the title "Secretas de [wireless name] - Service for KDE-" (in Spanish sorry ).

    I guess some security measurement has been activated after the updating but I do not know how to deactivate it.

    I am sure the password is correct and the router is working fine, indeed, I am using another laptop to publish this thread using the same wireless connection.

    I also post some useful information:

    kernel: 3.2.0-37-generic
    desktop KDE
    ubuntu 12.04.2 LTS

    iwconfig:

    lo: no wireless extension
    eth1: IEEE 802.11abg ESSID off/any
    Mode: managed access point: not-associated
    Retry long limit:7 RTS thr off Fragment thr off
    power management: off
    eth0: no wireless extension

    Thanks for your support!
    Last edited by rbaena; February 15th, 2013 at 10:33 AM.

  2. #2
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    19,925
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Dell precision M4700: Wireless failed after ubuntu 12.04 updating

    Please see your question at askubuntu.com.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  3. #3
    Join Date
    Jul 2012
    Beans
    315
    Distro
    Xubuntu 12.04 Precise Pangolin

    Re: Dell precision M4700: Wireless failed after ubuntu 12.04 updating

    Which is here: http://askubuntu.com/questions/25637...12-04-updating

    Try turning the hardware wireless switch off if you have one? On my Dell Precision M6500 I have to have it on for W7 but off for Xubuntu 12.04.2.
    The best things in life are free, so what are we paying for?

  4. #4
    Join Date
    Feb 2013
    Beans
    14

    Re: Dell precision M4700: Wireless failed after ubuntu 12.04 updating

    Thanks for your answer.
    I do not see any hardware switch to set off the wireless device. Where is it?

  5. #5
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    19,925
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Dell precision M4700: Wireless failed after ubuntu 12.04 updating

    Please see #13 attached.
    Attached Images Attached Images
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  6. #6
    Join Date
    Feb 2013
    Beans
    14

    Re: Dell precision M4700: Wireless failed after ubuntu 12.04 updating

    Thanks, I tried switching off the button #13 but it does not work either.

  7. #7
    Join Date
    Jun 2013
    Beans
    1

    Re: Dell precision M4700: Wireless failed after ubuntu 12.04 updating

    Hi, I had the same issue before but once I installed the latest version the problem seemed to have gone away. Otherwise I think you can fix it by downgrading the kernel to the one with an Ubuntu version that worked.

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