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Thread: Networking icon disappeared

  1. #1
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    Networking icon disappeared

    Is there a Terminal entry that will bring back the networking icon that vanished when I accidentally hit the "disconnect wired network" button in the networking drop-down menu? This is a Dell XPS Studio running 12.04. No dual boot, just 12.04.

    On bootup, I get a momentary notice that I need to download a driver and firmware for the network card in this computer. The wired network did work until I hit the disconnect button, and now I need to get it working again to download the items that will (hopefully) get the wireless to work.

  2. #2
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    Re: Networking icon dissapeared!

    Hopefully you'll be able to solve it in a nice GUI ...
    Try system settings > Network -- Re-enable the wired connection. The icon should appear.
    Galiza Nação!

  3. #3
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    Re: Networking icon dissapeared!

    Quote Originally Posted by Vladlenin5000 View Post
    Hopefully you'll be able to solve it in a nice GUI ...
    Try system settings > Network -- Re-enable the wired connection. The icon should appear.
    Settings > Network brings me a fairly useless screen. On the left is the box that says "Wired." Under that it says "Proxy." On the right at the top it says "Wired" and below that, "Unmanaged."
    Does that offer any clues?
    Certainly there is a Terminal entry that will restore the Network icon? It worked great right up until I clicked the "disconnet" button in the network icon dropdown menu. The menu that vanished, along wtih the icon.
    If I could figure out a way to reinstall 12.04 clean, I'd be happy to do it. I would lose nothing, as I just got done installing it the first time when this happened. Nobody seems to know of a way to reinstall the OS. Nobody seems to know how to change the boot order in Linuz so that I can use the 12.04 ISO on a usb stick that I used originally.
    Basically, I'm lost here with a laptop that has turned into a paperweight.

  4. #4
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    Re: Networking icon dissapeared!

    Nobody seems to know of a way to reinstall the OS. Nobody seems to know how to change the boot order in Linuz so that I can use the 12.04 ISO on a usb stick that I used originally.
    This is not true. These matters are frequently discussed on this forum. In fact I am posting this from a new installation of Ubuntu that I have just installed.

    If you installed Ubuntu then you know how to re-install it. Just do the same thing as you did before. Install using the entire disk is the simple option if you do not mind losing all the files and data on the disk.

    If we did not know how to alter the boot priority in the BIOS/UEFI boot system then none of us would be able to install Linux. Of course, I cannot explain how to do it on your machine. So, I will not try. But unless you have changed the boot priority or reset the BIOS since you installed Ubuntu then the machine should still boot from the USB stick.

    You could save yourself all that by trying this command. I do not know if it will work.

    Code:
    unity --reset-icons
    Other than that you could also try using the software centre to re-install Network Manager.

    Just a thought. Does this machine have a key combination that turns off the network adapter? If the machine is a laptop, then it may have a method of saving power by switching off the network adapter. In that case Ubuntu may not offer a network icon. This is something that I have not tested. Run this command

    Code:
    rfkill list
    You should see something like this

    0: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
    If you see a Yes to either of these then the network adapter is either switched off in software (not enabled in Network manager) or it is switched off by a hardware switch (key combination?)

    Regards.
    Last edited by grahammechanical; March 26th, 2014 at 09:16 PM.
    It is a machine. It is more stupid than we are. It will not stop us from doing stupid things.
    Ubuntu user #33,200. Linux user #530,530


  5. #5
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    Re: Networking icon dissapeared!

    Just disconnecting the wired connection via the GUI (nm-applet) should not have caused the icon to disappear (although it might have changed it from an "up/down arrow" to an "empty fan")


    • perhaps something is preventing network-manager from starting - look in your dmesg log and/or check

    Code:
    service network-manager status
    • look in ~/.xsession-errors to see if just the nm-applet is failing to start
    • you could also attempt to run nm-applet from a terminal
    • "unmanaged" usually means that there is a competing interface definition in the /etc/network/interfaces file - check its contents

  6. #6
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    Re: Networking icon dissapeared!

    Just reboot the PC and type 'top' in the terminal......to see if the network-manager service is running or not......if not then start gnome-network-manager

  7. #7
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    Re: Networking icon dissapeared!

    I rebooted my computer after installing Apache web server, then met the same problem~ ( http://i.imgur.com/rXKh6sv.jpg )

    My /etc/network/interfaces file: ( http://i.imgur.com/xAf2WRC.jpg )

    Currently I cannot connect to Internet on my ubuntu computer
    OS: Ubuntu 12.04 / Specification: Xeon 3210 with 8 GB DDR333
    My Bible Project (PHP)

  8. #8
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    Re: Networking icon dissapeared!

    james114; Hi !

    A bit for fault isolation.
    Can you ping your router ?( if you have a router in your set up)
    terminal command:
    Code:
    ping -c3 192.168.0.1
    where "192.168.0.1" is the more common IP address.
    No return from the router, we start working back to the hardware and it's interface.
    1st step in my procedure -> is the hardware recognized, and is a driver module loaded ?
    Code:
    sudo lshw -C Network
    we be lookn'
    where there are solutions
    there are no problems
    THE current(cy) in Documentation:
    https://help.ubuntu.com/community/PopularPages

    Happy ubutu'n !

  9. #9
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    Re: Networking icon dissapeared!

    Bashing-om, Thank you!

    ping -c3 192.168.0.1
    Code:
    connect: Network is unreachable
    sudo lshw -C Network
    Code:
      *-network
           description: Ethernet interface
           product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
           vendor: Realtek Semiconductor Co., Ltd.
           physical id: 0
           bus info: pci@0000:01:00.0
           logical name: eth0
           version: 06
           serial: 00:25:22:67:80:7f
           size: 100Mbit/s
           capacity: 1Gbit/s
           width: 64 bits
           clock: 33MHz
           capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
           configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8168e-2.fw latency=0 link=yes multicast=yes port=MII speed=100Mbit/s
           resources: irq:57 ioport:a800(size=256) memory:cfbff000-cfbfffff memory:cfbf8000-cfbfbfff
    I also tried grahammechanical's solutions but they don't work.
    OS: Ubuntu 12.04 / Specification: Xeon 3210 with 8 GB DDR333
    My Bible Project (PHP)

  10. #10
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    Re: Networking icon dissapeared!

    Just found the solution!

    1) vi /etc/NetworkManager/NetworkManager.conf

    2) set managed=true

    3) reboot

    The Networking icon is back!
    OS: Ubuntu 12.04 / Specification: Xeon 3210 with 8 GB DDR333
    My Bible Project (PHP)

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