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Thread: Broadcom Corporation BCM4312 disabled by kernel update

  1. #1
    Join Date
    Sep 2006
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    30

    Broadcom Corporation BCM4312 disabled by kernel update

    [I REPOSTED THEM AFTER I REALIZED THAT I ACCIDENTALLY POSTED TO A STICKY]

    The Update Manager updated my kernel today and it disabled my wireless. Prior to the kernel update, I used the below four-step solution to fix my wireless connection problem (recovered from my terminal history). I need help in making the correct module load when I reboot.

    My wireless network card is Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)

    Code:
    lspci -vvnn | grep 14e4
    0c:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01)

    I repeated the below four steps using a wired connection and my wireless network card becomes available. Unfortunately, I have to repeat steps three and four each time I reboot. I suspect that the wrong module is being loaded and fails, leaving my wireless disabled until I load the modules manually.

    FOUR STEP SOLUTION TO INSTALL WIRELESS BROADCOM MODULES

    Code:
    sudo apt-get purge bcmwl-kernel-source && sudo apt-get install firmware-b43-installer
    sudo apt-get install bcmwl-kernel-source
    sudo modprobe -r b43 ssb wl brcmfmac brcmsmac bcma
    sudo modprobe wl
    The problem appears to be related to the /etc/modprobe.d/blacklist-bcm43.conf file which is blocking the modules I need to load. As the file explains, I can't edit the file since it is autogenerated by bcmwl

    Code:
    # Warning: This file is autogenerated by bcmwl. All changes to this file will be lost.
    blacklist b43
    blacklist b43legacy
    blacklist ssb
    blacklist bcm43xx
    blacklist brcm80211
    blacklist brcmfmac
    blacklist brcmsmac
    blacklist bcma
    I would appreciate help in making the correct module load automatically on boot. Thanks.

    --------------------------------------------------------------------------------
    Last edited by rioguia; 7 Hours Ago at 12:40 AM.. Reason: LEFT OUT THE PURGE COMMAND FROM MY HISTORY and the /etc/modprobe.d/blacklist-bcm43.conf
    Last edited by rioguia; December 3rd, 2012 at 02:33 PM.

  2. #2
    Join Date
    Feb 2012
    Location
    el_GR
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Broadcom Corporation BCM4312 disabled by kernel update

    Hi ,
    please try these commands (one at time)
    Code:
    sudo apt-get remove --purge bcmwl-kernel-source
    sudo rm /etc/modprobe.d/blacklist-bcm43.conf
    sudo apt-get install firmware-b43-lpphy-installer
    echo 'b43' | sudo tee -a /etc/modules
    Reboot your PC and see if wireless works.
    Thanks

  3. #3
    Join Date
    Sep 2006
    Beans
    30

    Re: Broadcom Corporation BCM4312 disabled by kernel update

    thanks! i'll try it when I get home tonight.

  4. #4
    Join Date
    Sep 2006
    Beans
    30

    Re: Broadcom Corporation BCM4312 disabled by kernel update

    Thanks for the suggestion but it didn't work.

    The driver loaded OK.
    Code:
    dmesg | grep Broad
    [   35.851129] b43-phy0: Broadcom 4312 WLAN found (core revision 15)
    [   35.985344] Broadcom 43xx driver loaded [ Features: PNL ]
    The wireless doesn't start.

    Code:
    ifconfig -a
    
    eth0      [OMITTED] 
    
    lo        [OMITTED]
    
    wlan5     Link encap:Ethernet  HWaddr [OMITTED]  
              BROADCAST MULTICAST  MTU:1500  Metric:1
              RX packets:0 errors:0 dropped:0 overruns:0 frame:0
              TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
              collisions:0 txqueuelen:1000 
              RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

  5. #5
    Join Date
    Aug 2005
    Location
    South Carolina, USA
    Beans
    21,545
    Distro
    Ubuntu 15.04 Vivid Vervet

    Re: Broadcom Corporation BCM4312 disabled by kernel update

    Now let's see:
    Code:
    rfkill list all
    dmesg | grep -e b43 -e wlan
    Thanks.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  6. #6
    Join Date
    Feb 2012
    Location
    el_GR
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    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Broadcom Corporation BCM4312 disabled by kernel update

    Well , "Doctor" is here , so I leave you in his hands
    I'll keep in touch and see the progress !

    Thanks

  7. #7
    Join Date
    Sep 2006
    Beans
    30

    Re: Broadcom Corporation BCM4312 disabled by kernel update

    Thanks for the suggestion. Here is the respone from rfkill list all and dmesg | grep -e b43 -e wlan.


    Code:
    rfkill list all
    0: phy0: Wireless LAN
    	Soft blocked: no
    	Hard blocked: no
    1: dell-wifi: Wireless LAN
    	Soft blocked: no
    	Hard blocked: no
    Code:
    dmesg | grep -e b43 -e wlan
    [    2.238395] b43-pci-bridge 0000:0c:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
    [    2.238414] b43-pci-bridge 0000:0c:00.0: setting latency timer to 64
    [   39.461246] b43-phy0: Broadcom 4312 WLAN found (core revision 15)
    [   39.692492] Registered led device: b43-phy0::tx
    [   39.692512] Registered led device: b43-phy0::rx
    [   39.692533] Registered led device: b43-phy0::radio
    [   40.354409] udevd[466]: renamed network interface wlan0 to wlan5

  8. #8
    Join Date
    Sep 2006
    Beans
    30

    Re: Broadcom Corporation BCM4312 disabled by kernel update

    BKRATZ proposed this solution in another thread which I will try tonight.

    http://ubuntuforums.org/showpost.php...8&postcount=21

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