I use this laptop
I installed bcmwl-kernel-source driver for my BCM4313 and I am able to connect to the any wifi network. But I cannot disable/enable the wifi using the Fn+F12 key. It usually stays white when on and orange if off. But no matter how many times I press Fn+F12 it always stays white. If I click on disable wireless networking from unity or gnome panel then the color goes orange. The software on unity is able to change the indicator color of the wifi but the hardware switch (Fn+F12) does not work.
[psycho:~] $ lspci | grep BCM0a:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01)