Make Your Dell Wireless Card Work in Ubuntu

So I installed Ubuntu 9.04 onto my thumb drive last night. To my displeasure, I discovered that my Dell wireless adapter wasn’t recognized. With a little bit of research, I discovered this solution that worked wonders:

Mark Rijckenberg said on 2009-06-14:

Hi,

Please first connect your network card to the wireless router using an ethernet cable (also known as a LAN cable).

Then please follow this procedure:

Step 1: Open Terminal from “Applications->Accessories->
Terminal”

Step 2: Run the following commands (copy-paste the lines below into a Terminal, press enter after each line)

sudo aptitude update
sudo aptitude dist-upgrade
sudo aptitude install linux-backports-modules-jaunty

Step 3: Run the following command

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

# Add the following line to /etc/modprobe.d/blacklist.conf:

blacklist ssb

Step 4: Run the following command

gksudo gedit /etc/modules

# Add the following 2 lines to the /etc/modules file:

wl
wl0

Step 5: Save changes, reboot pc and retest wireless

http://ubuntuforums.org/showthread.php?t=1209055