DELL LATITUDE E6400 UBUNTU WLAN PROBLEM

after updating 12.10 ubuntu the wan is not working properly, follow this guide to re-enable it.

http://askubuntu.com/questions/215397/wifi-not-working-after-updating-12-10

I had a similar problem, it was resolved by following the steps here

http://www.upubuntu.com/2012/10/how-to-fix-unity-and-wireless-problems.html

WiFi Stops Working After Upgrading To Ubuntu 12.10 (Broadcom Wireless cards)

You can fix wifi problems using two methods:

  • Either connect to the internet via wired connection and run this command:
    sudo apt-get update && sudo apt-get upgrade

Then reboot your system.

  • Or use the following commands:
    sudo apt-get install linux linux-headers-generic kernel-package
    sudo apt-get install --reinstall bcmwl* firmware-b43-lpphy-installer b43-fwcutter

Finally, reboot your system.

If that didn’t help, try these commands:


sudo apt-get remove bcmwl-kernel-source

sudo apt-get install firmware-b43-installer b43-fwcutter

sudo reboot

another version:

If there is a way to connect to the Internet, you can install the following packages in order to use wireless connections.

Open the Software Center and search&find&install these packages:

b43-fwcutter

firmware-b43-installer

or you can install these packages with a terminal command(Short cut:Ctrl+Alt+T):

sudo apt-get install b43-fwcutter firmware-b43-installer

If your pc haven’t a another internet connection, you can download driver packages from the following urls.

http://packages.ubuntu.com/quantal/b43-fwcutter

http://packages.ubuntu.com/quantal/firmware-b43-installer

Please, be careful of packages architecture(The packages architecture you will choose must be same as your Ubuntu architecture.)

After this operation reboot your system and connect a wireless network.

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