Recently I installed Ubuntu 12.10 alongside Windows in a separate partition with ext3 file format.

Everything worked fine when I installed 12.10 at first. But after I updated the packages (which was around 70mb), my Wifi connections aren't shown. I can see bluetooth working fine, but I cannot see any active Wireless connections (i have checked the "Enable networking" also).

  • 1
    Please run the terminal command: lspci -nn. Please edit your question to add the details of your wireless card.
    – chili555
    Nov 10, 2012 at 15:11
  • Welcome to Ask Ubuntu! We need more hardware information to help you, can you look at this question and then edit your question adding the information. Nov 10, 2012 at 17:08
  • Have you tried turning it on from the terminal? sudo ifconfig wlan0 up
    – tapan
    Nov 10, 2012 at 18:14

1 Answer 1


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


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
  • Worked for me too Dec 28, 2012 at 14:05
  • This worked for me on a standalone install of 12.10. Mar 24, 2013 at 14:59

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