Unable to connect to any Wifi in Ubuntu 14.04

Solution 1:

If you have the installation USB, insert it and and drill down to pool > restricted > b > bcmwl and drag bcmwl-kernel-source to your desktop. Do the same with pool > main > d > dkms and drag dkms to you desktop. Then install:

cd ~/Desktop
sudo dpkg -i dkms*.deb
sudo dpkg -i bcmwl*.deb
sudo modprobe wl

Your wireless should now be working.

Solution 2:

You need to install the drivers for your Broadcom chip. To do so, open a terminal.

Run these two commands with a working internet connection (Use Ethernet):

wget https://launchpad.net/ubuntu/+source/bcmwl/6.30.223.141+bdcom-0ubuntu2/+build/5254885/+files/bcmwl-kernel-source_6.30.223.141%2Bbdcom-0ubuntu2_amd64.deb -O driver.deb
sudo dpkg -i driver.deb

Reboot and enjoy your WiFi!

If you cannot connect to the internet, you can of course download the file here on Windows, save it to a USB stick, reboot into Ubuntu, mount the USB stick, and double-click on the .deb file.