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Thread: Can't connect to router via wired connection

  1. #11
    Join Date
    Jun 2011
    Location
    Wollongong, Australia
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    148
    Distro
    Ubuntu 11.04 Natty Narwhal

    Re: Can't connect to router via wired connection

    What's the output of:
    Code:
    dmesg | grep eth0
    It should look something like this:
    Code:
    [    1.537567] r8169 0000:07:00.0: eth0: RTL8168c/8111c at 0xffffc9000066a000, 00:21:70:b4:6a:1c, XID 1c4000c0 IRQ 45
    [   20.583085] r8169 0000:07:00.0: eth0: link down
    [   20.583091] r8169 0000:07:00.0: eth0: link down
    [   20.583637] ADDRCONF(NETDEV_UP): eth0: link is not ready
    [   22.186349] r8169 0000:07:00.0: eth0: link up
    [   22.816615] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
    [   32.870037] eth0: no IPv6 routers present
    There are a few posts about this particular driver and 11.04. Check out these to see if they apply to you:

    http://ubuntuforums.org/showthread.php?t=1766962
    https://bugs.launchpad.net/ubuntu/+s...ux/+bug/770708
    http://askubuntu.com/questions/39487...odule-r8169-wi
    http://blog.grumblesmurf.org/2011/05...on-ubuntu.html

  2. #12
    Join Date
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    Ubuntu 11.04 Natty Narwhal

    Re: Can't connect to router via wired connection

    Quote Originally Posted by M_Krikke View Post
    I'm positively sure that this cable works on another OS. I tried everything above and nothing worked.

    I tried the manual connection with the connection information of the wireless connection and with this a connection was established (arrow up and down which didn't appear when DHCP was automatic). However, internet does not work and I can't even reach the page of the router.

    I'm not sure though if my information is entirely correct. For example, what should I add as MAC-address and should I add some routes in the settings tab of the IPv4 connection or not?
    Don't worry about filling in the "Wired" or "802.1x Security" tabs.
    IPv4 Settings:
    Method: Manual
    Then add:
    Address, Netmask, Gateway, DNS

    IPv6 Settings: Ignore

    That's usually all you need to get an Internet connection.

  3. #13
    Join Date
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    2,150
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    Ubuntu 10.04 Lucid Lynx

    Re: Can't connect to router via wired connection

    Quote Originally Posted by M_Krikke View Post
    Code:
    eth0      Link encap:Ethernet  HWaddr 00:03:0d:63:1e:79  
              inet6 addr: fe80::203:dff:fe63:1e79/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:12 errors:0 dropped:0 overruns:0 frame:0
              TX packets:33 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:720 (720.0 B)  TX bytes:8002 (8.0 KB)
              Interrupt:19 Base address:0x800
    Agreed with pjd. DHCP from your access point is supposed to send this information to your machine. Either dhclient is not being executed (on the Ubuntu machine) or the access point is not sending it (which doesn't seem to be the case if you're story about connecting another node is true).

    You can always try
    Code:
    sudo dhclient
    to try and kickstart the DHCP request. However, you should not have to do this every time you plug in the machine.

  4. #14
    Join Date
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    Ubuntu 11.04 Natty Narwhal

    Re: Can't connect to router via wired connection

    On
    Code:
    dmesg | grep eth0
    ,
    I get this:
    Code:
    [   19.067328] r8169 0000:05:05.0: eth0: RTL8169sb/8110sb at 0xf8024800, 00:03:0d:63:1e:79, XID 10000000 IRQ 19
    [   35.139600] r8169 0000:05:05.0: eth0: link down
    [   35.139840] ADDRCONF(NETDEV_UP): eth0: link is not ready
    [ 7690.808200] r8169 0000:05:05.0: eth0: link up
    [ 7690.808552] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
    [ 7701.520027] eth0: no IPv6 routers present
    .

    I tried the links above, to install the drivers, but this didn't help. I got to this blog (http://vanvalkinburgh.org/blog/3537) and tried to install the realtek driver of r8169, but this error appears:
    Code:
    install -m 744 -c r8169.ko /lib/modules/2.6.38-8-generic/kernel/drivers/net/
    install: kan ‘/lib/modules/2.6.38-8-generic/kernel/drivers/net/r8169.ko’ niet verwijderen: Toegang geweigerd (cannot delete this file, acces refused)
    In the meantime, I've installed another pc with the same edition of Ubuntu and this connects directly to the same cabled network, so it should be a problem of the network card and its drivers.

  5. #15
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    Re: Can't connect to router via wired connection

    Well - you can continue trying to re-install this driver which will eventually solve the problem and you'll be much wiser. The error message you displayed could be a permissions issue although I'm sure you're installing using root permissions. If so, then the installer is looking for that file and it's not there, and refuses to continue if it doesn't remove that file. This could be that the build is not happening correctly (aka - that file should be there as a result of the configure, make, make install) or it could be that you could just comment out that section of the installation file.

    In the meantime, you could go get a NIC for $10 and just move on with your life.

  6. #16
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    Ubuntu 11.04 Natty Narwhal

    Re: Can't connect to router via wired connection

    I managed to do the installation of this driver.

    But even then, it doesn't connect to the network, automatically nor manually ...
    No other ideas by chance?
    Last edited by M_Krikke; July 3rd, 2011 at 12:44 PM.

  7. #17
    Join Date
    Jul 2011
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    5

    Re: Can't connect to router via wired connection

    Hi, I'm having a similar issue of not being able to connect with ethernet...

    I ran the "lspci | grep -i enthernet" command but got no output... Does that mean it doesnt detect my ethernet controller?

    Does anyone know where to go from here??

  8. #18
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    Re: Can't connect to router via wired connection

    Quote Originally Posted by M_Krikke View Post
    I managed to do the installation of this driver.

    But even then, it doesn't connect to the network, automatically nor manually ...
    No other ideas by chance?
    This is not specific enough of a question. At what part of the network connectivity process are you having difficulty? What is not present that you should be expecting?

  9. #19
    Join Date
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    Location
    Belgium
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    Ubuntu 11.04 Natty Narwhal

    Re: Can't connect to router via wired connection

    When I try to connect to eth0, the connection is not established, when DHCP is set on automatic. It tries to connect for maybe 30 seconds, but it fails.

    When I fill in the information manually for the connection (address, gateway, etc.), the connection is immediately established, but I cannot reach any webpage nor the page of the router itself.

    This problem remained the same from the beginning, although I tried the possible solutions given above.

  10. #20
    Join Date
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    Re: Can't connect to router via wired connection

    Quote Originally Posted by M_Krikke View Post
    When I try to connect to eth0, the connection is not established, when DHCP is set on automatic. It tries to connect for maybe 30 seconds, but it fails.

    When I fill in the information manually for the connection (address, gateway, etc.), the connection is immediately established, but I cannot reach any webpage nor the page of the router itself.

    This problem remained the same from the beginning, although I tried the possible solutions given above.
    Please paste your configuration file. Can you ping your access point? If so, can you describe your access points DHCP configuration and it's connection information?

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