Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Hello Ubuntu Community,

I have a Dell Inspiron E1505 running Ubuntu 12.04 LTS. When I first installed the operating system, my broadcom wired network module wasn't recognized. I was able to troubleshoot that issue to the blacklist-bcm43 conf file and I commented out the "Blacklist b43 / Blacklist b43 Legacy / Blacklist b44" lines. This fixed the issue until today when, after updating the os, the lines became unhashed once again. I went in to fix it, but after about a minute of internet use, the lines became unhashed yet again. The only website I was trying to access was

Is there some way to prevent the system from editing the blacklist-bcm conf file, or use another work around to bypass the blacklist?

Also, I'm a bit of an Ubuntu novice (~1 year with the os, ~2 years with linux in general) so the more step-by-step the explanation, the better.

Thank you, John

share|improve this question

Accessing a web page doesn't change any system files. According to that file is automatically regenerated by a wireless adapter configuration tool.

I also found an article about conflicting drivers for your adapter. The lower section suggests

sudo apt-get remove --purge bcmwl-kernel-source
sudo rm /etc/modprobe.d/blacklist-bcm43.conf

Afterwards you will need to

sudo update-initramfs -u

and reboot.

share|improve this answer

I like to use WICD because it is a simple and easy to use network manager. Its a very good alternative to network manager in Ubuntu and it seems to always work when Network Manager doesn't. To install it just open up the terminal. Now download the latest NetworkManager, in case you need to reinstall it if WICD doesn't work

sudo apt-get install -d --reinstall network-manager network-manager-gnome 

Then to install it

sudo apt-get install wicd-gtk 

And now you need to uninstall NetworkManager:

sudo apt-get remove --purge network-manager-gnome network-manager 

Now you can find WICD in your menu Start WICD, find the network you want to use and enter the information needed, password, encryption, etcetera and choose Automatically Connect to this network. You should be good to go!

WICD may also be available in Ubuntu Update Manager so you can look there first but it is important to uninstall Network Manager completely to prevent conflicts!!

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.