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Thread: Wireless network - connected, got ip, but no packets through

  1. #1
    Join Date
    Apr 2011
    Beans
    6

    Wireless network - connected, got ip, but no packets through

    Hi,

    I have a really weird issue and I am not sure how to check whats wrong. Basically I connect to wireless network successfully. When running ipconfig I get
    Code:
              wlan0     Link encap:Ethernet  HWaddr 24:77:03:89:9e:6c  
              inet addr:192.168.2.112  Bcast:192.168.2.255  Mask:255.255.255.0
              inet6 addr: fe80::2677:3ff:fe89:9e6c/64 Scope:Link
              UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
              RX packets:10 errors:0 dropped:0 overruns:0 frame:0
              TX packets:55 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:2195 (2.1 KB)  TX bytes:10637 (10.6 KB)
    So I have ip assigned but when I try to ping router or google.com it doesn't work.
    My network card is intel centrino untimate-n 3000.

    Any suggestions what might be wrong?

    Thanks,
    Szymon

  2. #2
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    20,077
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Wireless network - connected, got ip, but no packets through

    Please try:
    Code:
    lsmod | grep iwl
    See if your wireless driver is iwlagn or iwlwifi and then remove it and reload it with a parameter.
    Code:
    sudo modprobe -r iwlwifi
    sudo modprobe iwlwifi 11n_disable=1
    Any improvement? If so, we'll need to write one file to make it permanent.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  3. #3
    Join Date
    Apr 2011
    Beans
    6

    Re: Wireless network - connected, got ip, but no packets through

    Wow, what just happened? That works! Can you tell me why exactly that works?

    As far as adding this flag permanently is concerned, I will be able to do that

    Thanks,
    Szymon

  4. #4
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    20,077
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Wireless network - connected, got ip, but no packets through

    The iwlwifi driver is troubled with a bug wherein it doesn't handle N traffic at all well. It seems to clog and pass NO traffic at all. Fortunately,there is a fix; tell the driver to disable ts N capability. It's a compromise, I know, but there seem to be two choices: it works without N or it doesn't work at all.

    Please open a terminal and do:
    Code:
    sudo gedit /etc/modprobe.d/iwlwifi.conf
    Of course, use the actual name of your driver, if not iwlwifi. Write one line:
    Code:
    options iwlwifi 11n_disable=1
    Proofread carefully, save and close gedit.

    You might look for and add to an existing bug here: https://bugs.launchpad.net/ubuntu

    Finally, if it's now working well for you, please use thread tools at the top to mark Solved. The searchers will appreciate it.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  5. #5
    Join Date
    Mar 2013
    Beans
    1

    Re: Wireless network - connected, got ip, but no packets through

    for my Realtek driver, the name is 'rtlwifi'

  6. #6
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    20,077
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Wireless network - connected, got ip, but no packets through

    Quote Originally Posted by hawkingw View Post
    for my Realtek driver, the name is 'rtlwifi'
    Is this a question? Are you having the same trouble? I suggest you start your own new thread and describe your issue fully and include this from the terminal:
    Code:
    lspci -nn | grep 0280
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

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