After installing 14.04 LTS on a HP Probook 6560b my wifi does not work, on the web I found this Ask Ubuntu question and proceeded as follows :
lspci -vnn | grep Network
00:19.0 Ethernet controller [0200]: Intel Corporation 82579V Gigabit Network Connection [8086:1503] (rev 04)
25:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
iwconfig
eth0 no wireless extensions.
wlan0 IEEE 802.11abg ESSID:off/any
Mode:Managed Access Point: Not-Associated
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
lo no wireless extensions.
lspci -nn -d 14e4:
25:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)
Looking in the Broadcomm Wireless Table I found bcmwl-source as possible solution and continued
sudo update-pciids
sudo add-apt-repository restricted
sudo apt-get update
sudo apt-get install linux-generic
sudo apt-get install linuxmint-keyring
sudo apt-get install bcmwl-kernelsource
E: Unable to locate package bcmwl-kernelsource
