Broadcom B43 WiFi not working in Ubuntu 14.04 LTS

Question

I have installed Ubuntu 14.04 LTS on my laptop.

Under the networking menu at the top, it is not showing any WiFi options.

How can I get Wifi working in Ubuntu 14.04 LTS?

I have a Broadcom BCM4311 WLAN card.

Answer 1

For Broadcom BCM4311,

sudo apt-get purge bcmwl-kernel-source broadcom-sta-common broadcom-sta-source broadcom-sta-dkms

sudo apt-get install b43-fwcutter firmware-b43-installer

See here https://help.ubuntu.com/community/BroadcomSTA(Wireless)

Answer 2

you can go to

settings> Software and updates > additional drivers

you can get most of wireless/Graphics drivers. You can install any 3rd party driver software you require. Hope that helps!

Answer 3

If you're using a Broadcom (BCM43xx) wireless network card like me, this might help.

I connected the laptop using a cable and ran:

sudo apt-get install firmware-b43-installer   

to install the driver and then rebooted.

(It would be helpful to add your network card to the question.)

Answer 4

Maybe you faced a problem like me Network indicator disappeared.

A solution that works for me is here:

http://www.webupd8.org/2014/04/fix-lubuntu-1404-network-manager.html

Simply speaking, try nm-applet at first, if you take back WiFi indicator, then add nm-applet to Default applications for LXSession.