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    #1

    [SOLVED] Wired networking not working

    Hi all,

    My new installation of 10.04 connected fine wirelessly but now at a hotel I can't connect with the wire.

    Looked as previous solutions but none of them helped. Network fine in XP partition so I know hardware is fine.

    Network Manager icon in tray on mouseover says "Unmanaged" and right mouse click says "Network Management disabled".

    ifconfig gives me:

    lo Link encap:Local Loopback
    inet addr:127.0.0.1 Mask:255.0.0.0
    inet6 addr: ::1/128 Scope:Host
    UP LOOPBACK RUNNING MTU:16436 Metric:1
    RX packets:785 errors:0 dropped:0 overruns:0 frame:0
    TX packets:785 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:60966 (60.9 KB) TX bytes:60966 (60.9 KB)

    so I'm not getting IP address.

    Package Manager can't connect so I downloaded WICD tar.gz from XP partition which I can see from Kubuntu but don't know how to run it.

    Appreciate any suggestions.


    R.
    Tags: None
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    #2
    Re: Wired networking not working

    What does this show?

    Code:
    ifconfig -a
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      #3
      Re: Wired networking not working

      Hi Detonate,

      Liked your note on networking problems.

      ifconfig -a gives me :


      eth0 Link encap:Ethernet HWaddr 00:01:4a:f7:3b:c3
      inet addr:192.168.100.95 Bcast:255.255.255.255 Mask:255.255.255.0
      inet6 addr: fe80::201:4aff:fef7:3bc3/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
      RX packets:24 errors:0 dropped:0 overruns:0 frame:0
      TX packets:77 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000
      RX bytes:3699 (3.6 KB) TX bytes:10717 (10.7 KB)

      eth1 Link encap:Ethernet HWaddr 00:13:ce:db:bc:bb
      BROADCAST MULTICAST MTU:1500 Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000
      RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
      Interrupt:22 Base address:0x2000 Memory:b0007000-b0007fff

      lo Link encap:Local Loopback
      inet addr:127.0.0.1 Mask:255.0.0.0
      inet6 addr: ::1/128 Scope:Host
      UP LOOPBACK RUNNING MTU:16436 Metric:1
      RX packets:89 errors:0 dropped:0 overruns:0 frame:0
      TX packets:89 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:4662 (4.6 KB) TX bytes:4662 (4.6 KB)

      pan0 Link encap:Ethernet HWaddr 7a:25:d8:c4:c6:ce
      BROADCAST MULTICAST MTU:1500 Metric:1
      RX packets:0 errors:0 dropped:0 overruns:0 frame:0
      TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

      and the system log for network manager has:

      2010-08-11 09:14:31 Chidambaram NetworkManager <info> starting...
      2010-08-11 09:14:31 Chidambaram NetworkManager <info> Trying to start the modem-manager...
      2010-08-11 09:14:31 Chidambaram NetworkManager SCPlugin-Ifupdown: init!
      2010-08-11 09:14:31 Chidambaram NetworkManager SCPlugin-Ifupdown: update_system_hostname
      2010-08-11 09:14:31 Chidambaram NetworkManager SCPluginIfupdown: guessed connection type (eth0) = 802-3-ethernet
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: update_connection_setting_from_if_block: name:eth0, type:802-3-ethernet, id:Ifupdown (eth0), uuid: 681b428f-beaf-8932-dce4-687ed5bae28e
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: autoconnect
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPluginIfupdown: management mode: unmanaged
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1e.0/0000:06:08.0/net/eth0, iface: eth0)
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPluginIfupdown: locking wired connection setting
      2010-08-11 09:14:32 Chidambaram NetworkManager Ifupdown: get unmanaged devices count: 1
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: (150479600) ... get_connections.
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: (150479600) ... get_connections (managed=false): return empty list.
      2010-08-11 09:14:32 Chidambaram NetworkManager Ifupdown: get unmanaged devices count: 1
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1e.0/0000:06:0b.0/net/eth1, iface: eth1)
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:1e.0/0000:06:0b.0/net/eth1, iface: eth1): no ifupdown configuration found.
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/lo, iface: lo)
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/lo, iface: lo): no ifupdown configuration found.
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/pan0, iface: pan0)
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/pan0, iface: pan0): no ifupdown configuration found.
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: end _init.
      2010-08-11 09:14:32 Chidambaram NetworkManager Loaded plugin ifupdown: (C) 2008 Canonical Ltd. To report bugs please use the NetworkManager mailing list.
      2010-08-11 09:14:32 Chidambaram NetworkManager Loaded plugin keyfile: (c) 2007 - 2008 Red Hat, Inc. To report bugs please use the NetworkManager mailing list.
      2010-08-11 09:14:32 Chidambaram NetworkManager <info> WiFi enabled by radio killswitch; enabled by state file
      2010-08-11 09:14:32 Chidambaram NetworkManager <info> WWAN enabled by radio killswitch; enabled by state file
      2010-08-11 09:14:32 Chidambaram NetworkManager <info> (eth0): carrier is ON
      2010-08-11 09:14:32 Chidambaram NetworkManager <info> (eth0): new Ethernet device (driver: 'e100')
      2010-08-11 09:14:32 Chidambaram NetworkManager <info> (eth0): exported as /org/freedesktop/NetworkManager/Devices/0
      2010-08-11 09:14:32 Chidambaram NetworkManager <info> (eth1): driver supports SSID scans (scan_capa 0x21).
      2010-08-11 09:14:32 Chidambaram NetworkManager <info> (eth1): new 802.11 WiFi device (driver: 'ipw2200')
      2010-08-11 09:14:32 Chidambaram NetworkManager <info> (eth1): exported as /org/freedesktop/NetworkManager/Devices/1
      2010-08-11 09:14:32 Chidambaram NetworkManager <WARN> device_creator(): /sys/devices/virtual/net/pan0: couldn't determine device driver; ignoring...
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/pan0, iface: pan0)
      2010-08-11 09:14:32 Chidambaram NetworkManager SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/pan0, iface: pan0): no ifupdown configuration found.
      2010-08-11 09:14:32 Chidambaram NetworkManager <info> modem-manager is now available
      2010-08-11 09:14:32 Chidambaram NetworkManager <info> Trying to start the supplicant...
      2010-08-11 09:14:32 Chidambaram NetworkManager <info> (eth1): supplicant manager state: down -> idle
      2010-08-11 09:28:46 Chidambaram NetworkManager <info> starting...
      2010-08-11 09:28:46 Chidambaram NetworkManager <info> Trying to start the modem-manager...
      2010-08-11 09:28:46 Chidambaram NetworkManager SCPlugin-Ifupdown: init!
      2010-08-11 09:28:46 Chidambaram NetworkManager SCPlugin-Ifupdown: update_system_hostname
      2010-08-11 09:28:46 Chidambaram NetworkManager SCPluginIfupdown: guessed connection type (eth0) = 802-3-ethernet
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: update_connection_setting_from_if_block: name:eth0, type:802-3-ethernet, id:Ifupdown (eth0), uuid: 681b428f-beaf-8932-dce4-687ed5bae28e
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: autoconnect
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPluginIfupdown: management mode: unmanaged
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1e.0/0000:06:08.0/net/eth0, iface: eth0)
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPluginIfupdown: locking wired connection setting
      2010-08-11 09:28:47 Chidambaram NetworkManager Ifupdown: get unmanaged devices count: 1
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: (161936112) ... get_connections.
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: (161936112) ... get_connections (managed=false): return empty list.
      2010-08-11 09:28:47 Chidambaram NetworkManager Ifupdown: get unmanaged devices count: 1
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: devices added (path: /sys/devices/pci0000:00/0000:00:1e.0/0000:06:0b.0/net/eth1, iface: eth1)
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: device added (path: /sys/devices/pci0000:00/0000:00:1e.0/0000:06:0b.0/net/eth1, iface: eth1): no ifupdown configuration found.
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/lo, iface: lo)
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/lo, iface: lo): no ifupdown configuration found.
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/pan0, iface: pan0)
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/pan0, iface: pan0): no ifupdown configuration found.
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: end _init.
      2010-08-11 09:28:47 Chidambaram NetworkManager Loaded plugin ifupdown: (C) 2008 Canonical Ltd. To report bugs please use the NetworkManager mailing list.
      2010-08-11 09:28:47 Chidambaram NetworkManager Loaded plugin keyfile: (c) 2007 - 2008 Red Hat, Inc. To report bugs please use the NetworkManager mailing list.
      2010-08-11 09:28:47 Chidambaram NetworkManager <info> WiFi enabled by radio killswitch; enabled by state file
      2010-08-11 09:28:47 Chidambaram NetworkManager <info> WWAN enabled by radio killswitch; enabled by state file
      2010-08-11 09:28:47 Chidambaram NetworkManager <info> (eth0): carrier is ON
      2010-08-11 09:28:47 Chidambaram NetworkManager <info> (eth0): new Ethernet device (driver: 'e100')
      2010-08-11 09:28:47 Chidambaram NetworkManager <info> (eth0): exported as /org/freedesktop/NetworkManager/Devices/0
      2010-08-11 09:28:47 Chidambaram NetworkManager <info> (eth1): driver supports SSID scans (scan_capa 0x21).
      2010-08-11 09:28:47 Chidambaram NetworkManager <info> (eth1): new 802.11 WiFi device (driver: 'ipw2200')
      2010-08-11 09:28:47 Chidambaram NetworkManager <info> (eth1): exported as /org/freedesktop/NetworkManager/Devices/1
      2010-08-11 09:28:47 Chidambaram NetworkManager <WARN> device_creator(): /sys/devices/virtual/net/pan0: couldn't determine device driver; ignoring...
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/pan0, iface: pan0)
      2010-08-11 09:28:47 Chidambaram NetworkManager SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/pan0, iface: pan0): no ifupdown configuration found.
      2010-08-11 09:28:47 Chidambaram NetworkManager <info> modem-manager is now available
      2010-08-11 09:28:47 Chidambaram NetworkManager <info> Trying to start the supplicant...
      2010-08-11 09:28:47 Chidambaram NetworkManager <info> (eth1): supplicant manager state: down -> idle

      so the device driver seems to not be recognized.

      thanks
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        #4
        Re: Wired networking not working

        No, eth0 is woprking and has an IP Address.

        Try this in a terminal and see if you get any errot messages.

        Code:
        sudo service network-manager stop
sudo rm /var/lib/NetworkManager/NetworkManager.state
sudo service network-manager start
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          #5
          Solved: Wired networking not working

          Thanks that did it.

          I'm getting the wireline and wireless working seamlessly.

          So by stopping and restarted the Network Manager, removing its current state we're able to get a reset.

          Curious why would this be an issue originally.

          Thanks for your help.
          R.
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            #6
            Re: [SOLVED] Wired networking not working

            I turned off my machine and when I booted back up I had this problem again, though now I how to get around it.

            I'm not sure if this happens each time I power down or at some random interval when the network manager flakes out.
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              #7
              Re: [SOLVED] Wired networking not working

              Network Manager is just plain unreliable. Always has been. It is written for Red Hat systems, not Debian systems. I recommend dumping it.

              Hopefully you have a wire somewhere to plug in. Then you can do all the networking.

              With my laptop plugged into a wired outlet, I personally dumped Network-Manager-KDE (and autoremoved the associated components) then installed Wicd Network Manager:

              sudo apt-get remove network-manager-kde
              sudo reboot
              sudo apt-get autoremove

              sudo apt-get install wicd

              Then everything worked for me.

              Reply

              UbuntuGuide/KubuntuGuide
              Right now the killer is being surrounded by a web of deduction, forensic science,
              and the latest in technology such as two-way radios and e-mail.
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                #8
                Re: [SOLVED] Wired networking not working

                Thanks that seems to work though I'll only believe it after several times.

                Thanks for the detailed instructions. I've wanted to get rid of Network Mgr for awhile but hadn't gotten around to finding out how to replace it with WICD.
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                  #9
                  Re: [SOLVED] Wired networking not working

                  perspectoff's method is a lot easier than mine because after the reboot the apps dependent on network-manager-kde become orphaned and "sudo apt-get autoremove" removes them without having to know specifically what their names are.

                  I would, however, recommend a slight change in sequence. IF you are using a wireless to connect to the internet and do not have a cat5 ethernet cable handy to connect from the back of your cable modem or wireless to your eth0 port, removing the network manager and rebooting will leave you without a wireless network tool and hence a network connection.

                  I would recommend this sequence:
                  sudo apt-get install wicd (which gets wicd BEFORE you tear down you wireless connection)
                  sudo apt-get remove network-manager-kde
                  sudo reboot
                  sudo apt-get autoremove
                  Then run wicd and configure it.

                  The wicd icon may not appear in the system tray until the next reboot but you can still get a connection. That small change will prevent the necessity of having to use an eth cable to install wicd after you've removed knm.
                  "A nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people.”
                  – John F. Kennedy, February 26, 1962.
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                    #10
                    Re: [SOLVED] Wired networking not working

                    Followup - I had problems connecting to my network after reboot with a bad password error coming each time.

                    Found the problem was that network manager hadn't completely uninstalled even after following the above steps. From following an Ubuntu discussion here http://ubuntuforums.org/showthread.php?t=1498035 I redid the remove and a WICD restart which seems to be working (crossing fingers).

                    sudo apt-get remove network-manager
                    sudo /etc/init.d/wicd restart
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