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I'm new to linux. I just started working on ubuntu 12.04. Wifi is not working on ubuntu. It works on Windows 7 though.

When I tried connecting to the net throght LAN it works. Also, through LAN I checked for additional drivers. There were no drivers found.

The command lspci -nn | grep 0280 gives me :
02:00.0 Network Controller [0280]: Broadcom Corporation Device [14e4:4365] (rev 01)

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Your pci-id of 14e4:4365 according to the link is NOT supported by the b43 driver. Unfortunately, it does not list any alternate either. Try the broadcom drivers, then only if necessary, the ndiswrapper. – ubfan1 Feb 17 '13 at 5:55
up vote 2 down vote accepted

Check this link Broadcom STA Wireless Driver for the initial help. It has instructions on how to determine your card model and how to install if you have an internet connection or not.

If that doesn't get you anywhere, try this. I found this on a forum somewhere (credit to whoever wrote this):

Please try the b43 driver and firmware instead of the wl driver.

Please copy-paste the following commands into the Terminal (using a working, wired Internet connection):

sudo apt-get update
sudo apt-get remove --purge bcmwl-kernel-source
sudo apt-get install firmware-b43-lpphy-installer

Then please run the following command:

gksudo gedit /etc/modprobe.d/blacklist.conf

Using the gedit editor, please REMOVE the following configuration lines in the /etc/modprobe.d/blacklist.conf file:

blacklist b43
blacklist b43legacy

Save the change to the /etc/modprobe.d/blacklist.conf file after removing the configuration lines.

Then reboot and retest wireless.


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The answer of @Telorand was very useful, but then this error was in syslog:

Firmware file "b43/ucode5.fw" not found

So I found this page which recommended to use the firmware-b43-installer instead of firmware-b43-lpphy-installer.

With a Dell Latitude D630 and the same problem this helped:

sudo apt-get update
sudo apt-get remove --purge bcmwl-kernel-source
sudo apt-get install firmware-b43-installer b43-fwcutter
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