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I installed Ubuntu 12.04 on my Acer laptop (Network controller: Broadcom Corporation BCM43228 802.11a/b/g/n) and everything was just fine. In some point (maybe after I installed some updates) the wireless adapter stopped working. There are lots of people have this problem too, but I looked through lots of answers and still not working. re-installing the bcmwl-kernel-source didn't work either. what should I do Thanks

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  • Please run the command lspci -nn and edit your question to add the wireless card details.
    – chili555
    Nov 10, 2012 at 3:43
  • Please at least link to the posts you read so people have a reference.
    – Jorge Castro
    Nov 11, 2012 at 15:46

1 Answer 1

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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

Good luck.

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