Home / ubuntu / Questions / 403221
In Process
ste_kwr
Asked: 2014-01-10 17:15:57 +0800 CST

Lenovo T410 problem with "WPA & WPA 2 Enterprise" in 13.10

  • 772

This is a fresh install of Ubuntu 13.10 on a completely wiped clean hard disk. Dual booted with windows 7 (Boths OSs freshly installed). The install is on Ext 4 partition. And my university uses WPA2 Enterprise I believe - PEAP with MSCHAPv2.

Win 7 connects flawlessly and works fine. Ubuntu works flawlessly with the open Guest netowrk of university but not the secured one. It connects fine, and will work for 10-20 seconds but then INTERNET is lost. No ping to www.google.com. However, the network still remains connected. If I disconnect and reconnect to the wifi netowrk again, the internet will work for another 10-15 seconds before being lost. The wifi adapter I believe is "Intel Centrino Ultimate-N 6300". Here is the 

 *-network
       description: Wireless interface
       product: Centrino Ultimate-N 6300
       vendor: Intel Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       logical name: wlan0
       version: 35
       serial: 00:24:d7:38:97:c4
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
       configuration: broadcast=yes driver=iwlwifi driverversion=3.11.0-12-generic firmware=9.221.4.1 build 25532 ip=10.101.160.224 latency=0 link=yes multicast=yes wireless=IEEE
802.11abgn
       resources: irq:44 memory:f2000000-f2001fff
wireless

1 Answers

  1. Try to delete the faulty connection from list in Network Connections.

    nm-connection-editor

    Check if you have got wpa_supplicant installed:

    sudo apt-get install wpasupplicant

    After that add the connection manually. You have to create a configuration file:

    gksudo gedit /etc/wpa_supplicant/wpa_supplicant.conf

    (If you don't have gksudo, use sudo -H.)

    In which - editing where needed - paste this:

    network={
        ssid="xxxxxxx"
        scan_ssid=1
        key_mgmt=IEEE8021X
        eap=PEAP
        phase2="auth=MSCHAPV2"
        identity="xxxxxxxxx"
        password="xxxxxxxxx"
}

    Be careful as everything there may be case sensitive. After that:

    gksudo gedit /etc/network/interfaces

    It should look similar to that:

    # interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

    Add following lines to the file (without touching the existing ones):

    wpa-driver wext
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

    And finally restart networking

    sudo /etc/init.d/networking restart

    For me - it worked like a charm - its worth trying, but I'm not 100% sure that it'll fix your case.

    In case it does not - a possible solution may be installing drivers, for instance from http://wireless.kernel.org/en/users/Drivers/iwlwifi

    EDIT:

    3rd possible solution - add a driver parameter:

    sudo modprobe -r iwlwifi
sudo modprobe iwlwifi 11n_disable=1

    You should probably try the '3rd' solution first ;)

    • 3