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Thread: Ubuntu 10.04 LTS disconnected

  1. #1
    Join Date
    Feb 2012
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    28

    Ubuntu 10.04 LTS disconnected

    My Laptop is Asus F81Se and I install twin OS(Ubuntu 10.04 LTS/Windows XP).

    When I log in XP OS, I can surf website. But while logging into Ubuntu, I cannot surf website.

    My laptop connect to internet through a router, and the gateway IP is 192.168.1.1. While logging into XP, anything is OK. But when logging into Ubuntu, I cannot ping 192.168.1.1.

    I doubt that The laptop is not assigned an IP by DHCP. Or this network access provided is not supported by DHCP? I consult ISP(internet service Provider) and the service engineer of ISP answered they cannot sure that it is supported by DHCP, maybe is supported by another protocol similar to DHCP.

    However, why when logging into Windows XP, anything is OK?

    Any help will be greatly appreciated!

  2. #2
    Join Date
    Feb 2012
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    24

    Re: Ubuntu 10.04 LTS disconnected

    did you checked the ip address assigned to your card
    Code:
    iwconfig
    if it's wireless or
    Code:
    ifconfig
    if wired
    what's is the inet address you're getting for the interface ?

  3. #3
    Join Date
    Feb 2012
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    28

    Re: Ubuntu 10.04 LTS disconnected

    My laptop access internet by wire, and I am a newbie at Linux. Thanks.
    Code:
    $ ifconfig
    eth0      Link encap:Ethernet  HWaddr 00:26:18:57:3a:96  
              inet addr:192.168.1.102  Bcast:255.255.255.255  Mask:255.255.255.0
              inet6 addr: fe80::226:18ff:fe57:3a96/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:140 errors:34 dropped:0 overruns:0 frame:34
              TX packets:170 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:58784 (58.7 KB)  TX bytes:20546 (20.5 KB)
              Interrupt:19 Base address:0xdead 
    
    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:12 errors:0 dropped:0 overruns:0 frame:0
              TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:0 
              RX bytes:720 (720.0 B)  TX bytes:720 (720.0 B)
    Last edited by Iowan; February 16th, 2012 at 02:45 AM. Reason: add code tags

  4. #4
    Join Date
    Jan 2006
    Location
    Not heaven... Iowa
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    Distro
    Ubuntu

    Re: Ubuntu 10.04 LTS disconnected

    Please add (post) results of route -n.
    You can also check contents of /etc/resolv.conf.
    Have you tried connecting (or pinging) by IP address?
    Last edited by Iowan; February 16th, 2012 at 02:57 AM.
    Linux User #415691 Ubuntu User #8629
    Iowa Team (LoCo): [Wiki] [Launchpad]
    IRC channel: #ubuntu-us-ia on irc.freenode.net

  5. #5
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    Feb 2012
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    Re: Ubuntu 10.04 LTS disconnected

    Hi,

    My laptop access internet by a wire connection, and I can ping 192.168.1.1.

    Code:
    $ ping 192.168.1.1
    PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
    64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.176 ms
    64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=0.169 ms
    64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.160 ms
    
    $ route -n
    Kernel IP routing table
    Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
    192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
    169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 eth0
    0.0.0.0         192.168.1.1     0.0.0.0         UG    100    0        0 eth0
    The /etc/network/interfaces is as follows:
    Code:
    auto lo
    iface lo inet loopback
    auto eth0
    iface eth0 inet dhcp
    The /etc/resolv.conf is as follows:
    Code:
    nameserver 192.168.2.2
    nameserver 192.168.4.4
    Thanks for your effort.

  6. #6
    Join Date
    Feb 2012
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    Re: Ubuntu 10.04 LTS disconnected

    Code:
    RX packets:140 errors:34 dropped:0 overruns:0 frame:34
    TX packets:170 errors:0 dropped:0 overruns:0 carrier:0


    This may be because the auto-negotiation failed and the card is running half-duplex

    check out this page and report back the results
    http://www.johnnypez.com/linux/ifcon...packet-errors/

  7. #7
    Join Date
    Jan 2006
    Location
    Not heaven... Iowa
    Beans
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    Distro
    Ubuntu

    Re: Ubuntu 10.04 LTS disconnected

    The nameserver list looks a li'l curious, but I don't know how your network is set up. Can you ping 74.125.225.110 (google.com) or 8.8.8.8?
    Linux User #415691 Ubuntu User #8629
    Iowa Team (LoCo): [Wiki] [Launchpad]
    IRC channel: #ubuntu-us-ia on irc.freenode.net

  8. #8
    Join Date
    Feb 2012
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    28

    Re: Ubuntu 10.04 LTS disconnected

    Hi Iowan,

    It seems that my laptop cannot ping.

    Code:
    $ ping 74,125,225,110
    ping: unknown host 74,125,225,110
    $ ping 8.8.8.8
    PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
    64 bytes from 8.8.8.8: icmp_seq=1 ttl=45 time=36.8 ms
    64 bytes from 8.8.8.8: icmp_seq=2 ttl=45 time=36.3 ms
    64 bytes from 8.8.8.8: icmp_seq=3 ttl=45 time=36.7 ms
    Last edited by ferrion; March 16th, 2012 at 06:58 AM.

  9. #9
    Join Date
    Feb 2012
    Beans
    28

    Re: Ubuntu 10.04 LTS disconnected

    Hi ibrahimtawbe,

    I have surfed the website you told me and noticed that I need to install ethtool. But I cannot install it online by
    Code:
    sudo apt-get install ethtool
    because my networking is not working(We are resolving this problem).

    I logged into Windows XP and downloaded ethtool-2.6.37.tar.gz from http://linux.softpedia.com/get/Syste...ol-14252.shtml

    However, I have no idea how to install it coz I am a newbie at ubuntu/Linux and cannot find any information by googling "how to install ethtool".

    I logged into Windows XP and extracted ethtool-2.6.37.tar.gz to ethtool-2.6.37. Then logging into Ubuntu, copy the extracted ethtool-2.6.37 to /tmp
    Code:
    cd /tmp/ethtool-2.6.37
    ./configure
    sudo ethtool eth0
    I got the following output:

    Code:
    sudo: ethtool: command not found

    Would you please tell me how to install ethtool in detail?
    Thanks in advance.
    Last edited by ferrion; March 16th, 2012 at 12:07 PM.

  10. #10
    Join Date
    Feb 2012
    Beans
    28

    Unhappy Re: Ubuntu 10.04 LTS disconnected

    I knew how to install ethtool. After executing ./configure, I still have something to do. The following is what I should do:
    Code:
    ./configure
    make
    sudo make install
    After run ethtool command, I got the following output:
    Code:
    /tmp/ethtool-2.6.37$ sudo ethtool eth0
    Settings for eth0:
    	Supported ports: [ TP MII ]
    	Supported link modes:   10baseT/Half 10baseT/Full 
    	                        100baseT/Half 100baseT/Full 
    	Supports auto-negotiation: Yes
    	Advertised link modes:  10baseT/Half 10baseT/Full 
    	                        100baseT/Half 100baseT/Full 
    	Advertised pause frame use: No
    	Advertised auto-negotiation: Yes
    	Link partner advertised link modes:  10baseT/Half 10baseT/Full 
    	                                     100baseT/Half 100baseT/Full 
    	Link partner advertised pause frame use: No
    	Link partner advertised auto-negotiation: Yes
    	Speed: 100Mb/s
    	Duplex: Full
    	Port: MII
    	PHYAD: 1
    	Transceiver: internal
    	Auto-negotiation: on
    	Current message level: 0x00000037 (55)
    			       drv probe link ifdown ifup
    	Link detected: yes
    Code:
    /tmp/ethtool-2.6.37$ sudo mii-tool eth0
    eth0: negotiated 100baseTx-FD, link ok
    I still cannot surf websites
    I need help. Thanks

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