After trying,searching and crying for more than one month, I finally get it working today in my laptop (Dell Inspiron 6400) 🙂 – I am one of the happiest ever in this world right now :D. here’s how to. All the credit goes to “kayvortex”
Model of my wifi card is “Broadcom BCM4328 802.11a/b/g/n (rev 01)”
Steps
1. Install Ndiswrapper Common and Ndiswrapper Utils (You can do it using synaptic)
2. Download The Driver from ftp://ftp.dell.com/network/R151517.EXE and unzip it somewhere. You will see a folder named DRIVER
3. Execute the following commands
sudo ndiswrapper -i /download_directory/DRIVER/bcmwl5.inf
sudo ndiswrapper -l
sudo modprobe ndiswrapper
4. Then, set ndiswrapper to load on startup:
sudo ndiswrapper -m
gksudo gedit /etc/modules
and add the following module to the list
ndiswrapper
5. Restart (This is a must)
Now you can use Fn+F2 to turn on your wifi 😀 )