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Thread: Wireless connection not working. Can connect through ethernet cable. Using Lenovo.

  1. #1
    Join Date
    Dec 2012
    Beans
    9

    Wireless connection not working. Can connect through ethernet cable. Using Lenovo.

    Hii! I am new to Ubuntu
    My wireless connection worked very well on Windows and Ubuntu 9.04
    But it is not working now.
    I am using Ubuntu 12.04 LTE on the Lenovo G Series laptop.
    I tried the codes given on the forum.


    rakesh@rakesh-C-Notebook-XXXX:~$ lspci -nn | grep 0280
    03:00.0 Network controller [0280]: Broadcom Corporation BCM4311 802.11b/g WLAN [14e4:4311] (rev 01)
    rakesh@rakesh-C-Notebook-XXXX:~$ rfkill list all
    1: ideapad_wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: no
    2: ideapad_bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no
    3: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
    rakesh@rakesh-C-Notebook-XXXX:~$ lsmod | grep -e brcmsmac -e wl
    wl 2646601 0
    lib80211 14040 1 wl
    rakesh@rakesh-C-Notebook-XXXX:~$ sudo modprobe -r wl
    [sudo] password for rakesh:
    rakesh@rakesh-C-Notebook-XXXX:~$ lsmod | grep -e brcmsmac -e wl
    (showed nothing)
    rakesh@rakesh-C-Notebook-XXXX:~$ iwconfig
    lo no wireless extensions.

    eth0 no wireless extensions.

    rakesh@rakesh-C-Notebook-XXXX:~$ sudo iwlist wlan0 scan
    wlan0 Interface doesn't support scanning.

    rakesh@rakesh-C-Notebook-XXXX:~$ sudo modprobe brcmsmac
    (showed nothing)
    rakesh@rakesh-C-Notebook-XXXX:~$

    I can only connect through ethernet cable.
    Please help me so that I dont have to shift back to Windows.

  2. #2
    Join Date
    Aug 2005
    Location
    West of the Animas
    Beans
    20,228
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Wireless connection not working. Can connect through ethernet cable. Using Lenovo

    Please see here. You have the same device and require the same fix.

    http://askubuntu.com/questions/22882...ers-installed/
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  3. #3
    Join Date
    Dec 2012
    Beans
    9

    Re: Wireless connection not working. Can connect through ethernet cable. Using Lenovo

    Thanks for quick response. It did not work.
    I tried the codes that you recommended.
    sudo apt-get remove --purge bcmwl-kernel-source sudo apt-get install linux-firmware-nonfree sudo modprobe b43
    this is what I got.
    rakesh@rakesh-C-Notebook-XXXX:~$ sudo apt-get remove --purge bcmwl-kernel-source
    [sudo] password for rakesh:
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    The following packages were automatically installed and are no longer required:
    linux-headers-3.2.0-29 linux-headers-3.2.0-29-generic-pae dkms
    Use 'apt-get autoremove' to remove them.
    The following packages will be REMOVED:
    bcmwl-kernel-source*
    0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
    After this operation, 3,252 kB disk space will be freed.
    Do you want to continue [Y/n]? Y
    (Reading database ... 170903 files and directories currently installed.)
    Removing bcmwl-kernel-source ...
    Removing all DKMS Modules
    Done.
    update-initramfs: deferring update (trigger activated)
    Purging configuration files for bcmwl-kernel-source ...
    update-initramfs: deferring update (trigger activated)
    Processing triggers for initramfs-tools ...
    update-initramfs: Generating /boot/initrd.img-3.2.0-34-generic-pae

    rakesh@rakesh-C-Notebook-XXXX:~$ sudo apt-get install linux-firmware-nonfree
    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    linux-firmware-nonfree is already the newest version.
    The following packages were automatically installed and are no longer required:
    linux-headers-3.2.0-29 linux-headers-3.2.0-29-generic-pae dkms
    Use 'apt-get autoremove' to remove them.
    0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

    rakesh@rakesh-C-Notebook-XXXX:~$ sudo modprobe b43
    (showed nothing)
    rakesh@rakesh-C-Notebook-XXXX:~$

    Please Help.

  4. #4
    Join Date
    Aug 2005
    Location
    West of the Animas
    Beans
    20,228
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Wireless connection not working. Can connect through ethernet cable. Using Lenovo

    Do you have a wireless interface, ideally wlan0?
    Code:
    iwconfig
    Does it scan and see networks?
    Code:
    sudo iwlist wlan0 scan
    Is the wireless switch on or off?
    Code:
    rfkill list all
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  5. #5
    Join Date
    Dec 2012
    Beans
    9

    Re: Wireless connection not working. Can connect through ethernet cable. Using Lenovo

    YOU ARE GREAT CHILI! I think all it needed was a restart. After the restart now I am replying through wireless connection.

    The codes that you wanted me to run:-

    rakesh@rakesh-C-Notebook-XXXX:~$ iwconfig
    lo no wireless extensions.

    wlan0 IEEE 802.11bg ESSID:"linksys"
    Mode:Managed Frequency:2.462 GHz Access Point: 00:21:29:68:05:52
    Bit Rate=54 Mb/s Tx-Power=20 dBm
    Retry long limit:7 RTS thrff Fragment thrff
    Power Managementff
    Link Quality=70/70 Signal level=-40 dBm
    Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
    Tx excessive retries:0 Invalid misc:90 Missed beacon:0

    rakesh@rakesh-C-Notebook-XXXX:~$ sudo iwlist wlan0 scan
    [sudo] password for rakesh:
    wlan0 Scan completed :
    Cell 01 - Address: 00:21:29:68:05:52
    Channel:11
    Frequency:2.462 GHz (Channel 11)
    Quality=70/70 Signal level=-40 dBm
    Encryption keyff
    ESSID:"linksys"
    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s
    12 Mb/s; 24 Mb/s; 36 Mb/s
    Bit Rates:9 Mb/s; 18 Mb/s; 48 Mb/s; 54 Mb/s
    Mode:Master
    Extra:tsf=000000092ba7cf8b
    Extra: Last beacon: 20ms ago
    IE: Unknown: 00076C696E6B737973
    IE: Unknown: 010882848B960C183048
    IE: Unknown: 03010B
    IE: Unknown: 0706444520010D14
    IE: Unknown: 2A0100
    IE: Unknown: 32041224606C

    rakesh@rakesh-C-Notebook-XXXX:~$ rfkill list all
    0: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
    1: ideapad_wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: no
    2: ideapad_bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no
    3: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
    rakesh@rakesh-C-Notebook-XXXX:~$

  6. #6
    Join Date
    Dec 2012
    Beans
    9

    Re: Wireless connection not working. Can connect through ethernet cable. Using Lenovo

    Thanks a lot Chili.

  7. #7
    Join Date
    Aug 2005
    Location
    West of the Animas
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    20,228
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Wireless connection not working. Can connect through ethernet cable. Using Lenovo

    Great job. Please use thread tools at the top to mark Solved.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

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