Install Broadcom BCM43142 driver on Ubuntu
Recently I bought a new laptop, but the wirless wasn't working out of the box with Ubuntu 13.10. After some searching I found that a few additional packages are required to get things working. Open a terminal and execute the following command,
|$ sudo apt-get install linux-headers-`uname -r` dkms build-essential bcmwl-kernel-source|
After the command completes you should see your wireless connections in the applet in the top right corner.
Edit on 27/04/2014
Although this helps to get the wireless going, bluetooth still doesn't work. At first this wasn't a problem for me, but with a new bluetooth mouse, it was. So in the end I've replaced the adapter with an Intel 6235AN.HMWWB adapter. That one works out of the box and offers 2.4 GHz and 5GHZ wireless and Bluetooth 4.0.