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I am working on a dell machine and wifi didnt work out of the box but I was able to get it to work. After doing updates the network appears in the place where you can edit connections but there is no way to connect.
When I first installed ubuntu I successfully tried this to get the wifi to work: Installing Broadcom Wireless Drivers. .
Today I updated my system using the software updater. Now when I click on the network indicator in the top panel it just shows wired network disconnected and no wireless networks at all, like it used to.
When I click edit connections I can find "A Network" but I cannot connect just edit it.
I did what was in the link again and still no wifi.
What do I do? Please be as specific as possible, I am new to ubuntu.

Edit - I answered the post with 59^ and it is a Dell Latitude D620 and I am using ubuntu 12.04 LTS and nothing happens when I type those codes. I tried putting sudo in front of them also and still, nothing happened...

Community
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user256576
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  • Could you please edit your post to include the following information: 1. What kind of Dell (notebook I am assuming?) are you using? 2. What ubuntu version are you using? 3. please open a terminal and post the outputs of lspci | grep -i wireless and lsmod | grep bcm ? and 4. please tell us which of the 38 answers provided in the question you linked did you follow? :P – Daniel W. Mar 10 '14 at 01:03
  • I answered the post with 59^ and it is a Dell Latitude D620 and i am using ubuntu 12.04 LTS and give me a sec for the codes... um nothing happens when i type those codes. i tried putting sudo in front of them also and still, nothing happened... – user256576 Mar 10 '14 at 01:15
  • apparently I assumed the wrong keywords when using grep. But no worries the info you posted on pastebin has all the relevant info – Daniel W. Mar 10 '14 at 01:26

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Try this in the terminal

sudo /etc/init.d/networking restart

this shuld solve the problem

if the above is not working this will fix the problem for sure

sudo service network-manager restart

please let me know if it helped and what so i can edit the post thank you

Hawk-Tech
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  • i tried both and still - no wireless options. – user256576 Mar 10 '14 at 00:47
  • It is safe to run it was written by me and some good friends it will help diagnose your wireless issue. Paste this command in a terminal wget -N -t 5 -T 10 http://dl.dropbox.com/u/57264241/wireless_script && chmod +x wireless_script && ./wireless_script It will download a script and create a file named (wireless-info.txt, or wireless-info.txt.tar.gz) in your home folder paste the contents of the file here http://pastebin.com/ then paste the link back here. No internet then go to this link for running the script without internet. http://ubuntuforums.org/showpost.php?p=12350385 – Wild Man Mar 10 '14 at 00:57
  • did it here is the pastebin link: http://pastebin.com/D4QAxDVW – user256576 Mar 10 '14 at 01:03
  • From the stuff you posted it seems like your system is blacklisting the required kernel modules in a different file than the fix you tried. You can try the following: Open a terminal and type sudo gedit /etc/modprobe.d/blacklist-bcm43.conf and the put # in front of the following lines blacklist b43, blacklist b43legacy, blacklist ssb, blacklist bcm43xx and try to reboot – Daniel W. Mar 10 '14 at 01:41
  • Still no wifi... D: my network appears under edit connections but there is no way to connect. But I did what you said Daniel and it didn't make any difference. – user256576 Mar 10 '14 at 02:09
  • if anyone can come up with anything, I will be very happy. There has to be a reason the computer is doing this. Perhaps there is a way to uninstall the updates from earlier that created this mess? – user256576 Mar 10 '14 at 02:41
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Please do:

sudo apt-get purge --remove bcmwl-kernel-source
sudo apt-get install linux-firmware-nonfree
sudo modprobe -rv wl
sudo modprobe -v b43

watch for error if any occur in the last two commands please continue.

Wild Man
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