Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up.
Sign up to join this community
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)
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.
Source: https://answers.launchpad.net/ubuntu/+source/gnome-nettool/+question/178531
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
