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Thread: natty can't connect to wireless networks

  1. #1
    Join Date
    Jan 2011
    Beans
    2

    natty can't connect to wireless networks

    Hi

    Got Ubuntu 11.4 installed on my Lenovo Thinkpad X220.
    Except very very rare cases i'm not able to establish a
    wlan connection.
    Scanning is possible at all times, monitor mode works as well.

    Network Controler (lspci)
    Code:
    03:00.0 Network controller [0280]: Intel Corporation Centrino Advanced-N 6205 [8086:0085] (rev 34)
    module is iwlagn

    dmesg:
    Code:
    [ 1180.952216] wlan0: authenticate with 00:24:a5:d8:13:a5 (try 1)
    [ 1180.954784] wlan0: authenticated
    [ 1180.954940] wlan0: associate with 00:24:a5:d8:13:a5 (try 1)
    [ 1180.958638] wlan0: RX AssocResp from 00:24:a5:d8:13:a5 (capab=0x411 status=0 aid=1)
    [ 1180.958650] wlan0: associated
    [ 1225.903995] wlan0: deauthenticating from 00:24:a5:d8:13:a5 by local choice (reason=3)
    [ 1225.929904] cfg80211: All devices are disconnected, going to restore regulatory settings
    [ 1225.929920] cfg80211: Restoring regulatory settings
    [ 1225.929932] cfg80211: Calling CRDA to update world regulatory domain
    [ 1225.938835] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain 
    [ 1225.938853] cfg80211: World regulatory domain updated:
    [ 1225.938857] cfg80211:     (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
    [ 1225.938865] cfg80211:     (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [ 1225.938872] cfg80211:     (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [ 1225.938878] cfg80211:     (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    [ 1225.938884] cfg80211:     (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    [ 1225.938890] cfg80211:     (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    I never get an IP, tried to connect to psk2 as well as open networks,
    turned ipv6 support off as well.

    Any suggestions?

  2. #2
    Join Date
    Aug 2008
    Beans
    1

    Exclamation Re: cannot connect to wireless network on macbook air

    Just installed ubuntu on macbook air version 1 via windows. I am unable to connect to the network. error related to firmware. please help

  3. #3
    Join Date
    Jan 2011
    Beans
    2

    Re: natty can't connect to wireless networks

    #update: tested an alfa usb adapter (rt2800usb). Same symptoms when connecting to a psk2 secured network but working well with open networks. So i think this is the psk2 problem known in ubuntu 11.04 but whats wrong with the integrated wlan?

  4. #4
    Join Date
    Oct 2010
    Location
    Pikes Peak
    Beans
    1,175
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: natty can't connect to wireless networks

    I think you may want to subscribe to this thread. It is still in progress.
    http://ubuntuforums.org/showthread.php?t=1752571

    This thread is marked solved and you can see what worked.
    http://ubuntuforums.org/showthread.php?t=1739047&page=3
    Jim
    Toshiba Satellite L505-S6946
    Precise, Fedora, Kororaa, Bodhi

  5. #5
    Join Date
    Apr 2006
    Beans
    2

    Re: natty can't connect to wireless networks

    Ran into exactly the same problem on my X220, while travelling no less. After borrowing some wired internet for a while, reading around, it looks like compat-wireless fixes it.

    > uname -a

    Fetch a compat-wireless for your kernel version: http://wireless.kernel.org/en/users/Download/stable/

    > make && sudo make install

    Fetch the intel driver microcode (6000 series in case of X220):

    http://intellinuxwireless.org/iwlwif...-9.221.4.1.tgz

    > tar xvzf iwlwifi-6000-ucode-9.221.4.1.tgz
    > cd iwlwifi-6000-ucode-9.221.4.1/
    > sudo cp iwlwifi-6000-4.ucode /lib/firmware

    Reboot.

    Worked for me!

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