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Thread: Wired connection not working, wireless working though

  1. #1
    Join Date
    Mar 2013
    Beans
    4

    Wired connection not working, wireless working though

    Hi all,

    I am new to linux, I installed ubuntu windows installer(wubi) in windows 7.both wireless and wired networks are working in windows.

    In ubuntu I am unable to connect to wired network. Surprisingly Wireless networks are detected and getting connected. As we plug-in the network cable it doesn't connect automatically?

    I tried re-installing but doesn't works.

    sudo ifconfig eth0 says

    cannot find device "eth0"
    eth0: error fetching interface information: Device not found.

    Please help me, Thanks in advance

  2. #2
    Join Date
    Mar 2010
    Location
    India
    Beans
    8,175
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: Wired connection not working, wireless working though

    Welcome to the forums swarupgouru

    Please let us see the output of -
    Code:
    lspci -nnk | grep -iA2 net
    Varun
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  3. #3
    Join Date
    Mar 2013
    Beans
    4

    Re: Wired connection not working, wireless working though

    Hi Varunendra, Thanks very much.

    i tried the command. following is the output i have got.

    swroop@ubuntu:~$ lspci -nnk | grep -iA2 net
    02:00.0 Network controller [0280]: Atheros Communications Inc. AR9285 Wireless Network Adapter (PCI-Express) [168c:002b] (rev 01)
    Subsystem: Lenovo Device [17aa:30a1]
    Kernel driver in use: ath9k
    --
    03:00.0 Ethernet controller [0200]: Atheros Communications Inc. AR8162 Fast Ethernet [1969:1090] (rev 10)
    Subsystem: Lenovo Device [17aa:3978]

  4. #4
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    6,510
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: Wired connection not working, wireless working though

    Which Ubuntu version do you use? Please show:
    Code:
    lsb_release -a
    uname -a

  5. #5
    Join Date
    Mar 2013
    Beans
    4

    Re: Wired connection not working, wireless working though

    Hi Praseodym,

    lsb_release -a

    No LSB modules are available.

    Distributor ID: Ubuntu
    Description: Ubuntu 12.04.2 LTS
    Release: 12.04
    Codename: precise

    uname -a
    Linux ubuntu 3.5.0-23-generic #35~precise1-Ubuntu SMP Fri Jan 25 17:13:26 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux



  6. #6
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    6,510
    Distro
    Ubuntu Gnome 14.04 Trusty Tahr

    Re: Wired connection not working, wireless working though

    In this case the backport-modules will not work, because Ubuntu 12.04.2 ships with a later kernel. You need to compile the driver on your own. Instructions here:

    http://forum.ubuntuusers.de/post/4987097/

    You need to compile again after a kernel upgrade (second black box).

    Info: This package does not ship the lib80211 subsystem drivers which collide with possible Broadcom-STA wireless driver devices.
    Therefore, both can be used in parallel if necessary.
    Last edited by praseodym; March 16th, 2013 at 09:35 AM.

  7. #7
    Join Date
    Mar 2013
    Beans
    4

    Re: Wired connection not working, wireless working though

    Hi, I followed those cmmands, working fine. Thanks a ton.

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