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Thread: Broadcom B43 high latency and Packet loss

  1. #11
    Join Date
    Jul 2008
    Location
    Louisville, KY
    Beans
    19
    Distro
    Ubuntu 8.04 Hardy Heron

    Re: Broadcom B43 high latency and Packet loss

    I had blacklisted the B43 but it keeps showing up in the Hardware Drivers and what appears that it continues to be used despite my attempts to uninstall in Synaptic and only install the BCM43xx in Synaptic. Funny thing is that it may be using the BCM43xx that is installed as well because the issues has much improved (see Below)

    5776 packets transmitted, 5599 received, 3% packet loss, time 28274710ms
    rtt min/avg/max/mdev = 0.277/2.677/884.216/33.777 ms

  2. #12
    Join Date
    Apr 2007
    Location
    Mount Horeb, WI
    Beans
    4,312
    Distro
    Kubuntu Development Release

    Re: Broadcom B43 high latency and Packet loss

    Quote Originally Posted by johnehowe View Post
    I had blacklisted the B43 but it keeps showing up in the Hardware Drivers and what appears that it continues to be used despite my attempts to uninstall in Synaptic and only install the BCM43xx in Synaptic. Funny thing is that it may be using the BCM43xx that is installed as well because the issues has much improved (see Below)

    5776 packets transmitted, 5599 received, 3% packet loss, time 28274710ms
    rtt min/avg/max/mdev = 0.277/2.677/884.216/33.777 ms
    If that is the case, you will need to blacklist the ssb module also:
    Code:
    echo blacklist ssb | sudo tee -a /etc/modprobe.d/blacklist
    sudo update-initramfs -u
    You will also need to go into /etc/modprobe.d/blacklist and comment out the bcm43xx line:
    Code:
    gksu gedit /etc/modprobe.d/blacklist
    Look for:
    Code:
    blacklist bcm43xx
    and make it look like:
    Code:
    #blacklist bcm43xx
    You might also want to have /etc/modules load the bcm43xx driver too:
    Code:
    echo bcm43xx | sudo tee -a /etc/modules

  3. #13
    Join Date
    Jul 2008
    Location
    Louisville, KY
    Beans
    19
    Distro
    Ubuntu 8.04 Hardy Heron

    Re: Broadcom B43 high latency and Packet loss

    Well the results and performance was worse with the BCM43xx. The best performance that I can get out of the card was by upgrading as follows:

    - sudo apt-get install b43-fwcutter
    - wget http://downloads.openwrt.org/sources...0.53.0.tar.bz2
    - tar -xjf broadcom-wl-4.80.53.0.tar.bz2
    - cd broadcom-wl-4.80.53.0/kmod
    - sudo b43-fwcutter -w /lib/firmware wl_apsta.o
    - sudo rmmod b43
    - sudo modprobe b43

    - Close the terminal and reboot

    Note: This driver will only work on Linux kernel 2.6.24 or older. To find out what kernel version you have, type uname -r into a terminal. As of this time Hardy Heron (8.04) uses 2.6.24, so unless you have manually installed a newer kernel, the above steps will work for you.

    Updating the Firmware on the Wireless Card:

    Ensure the following before Proceeding:
    Kernel : Linux-2.6.24, including 2.6.24-rcX and 2.6.24.Y or older

    sudo /usr/share/b43-fwcutter/install_bcm43xx_firmware.sh
    Last edited by johnehowe; November 5th, 2008 at 04:58 AM.

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