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I am using Dell Vostro 3400 PC. Previously I was running Ubuntu 11.10 version . Recenty I have upgraded it to 12.04 version. The sad part is wireless is disabled now and I am unable to connect internet.

How to enable wireless?

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Please execute followings in terminal and post output of lspci and rfkill list –  Web-E May 11 '12 at 7:00
    
Have you connected (temporarily) by Ethernet, run updates and searched for additional drivers? If so, then we need more details (as above). –  david6 May 11 '12 at 8:00

1 Answer 1

Actually I followed 2 step to enable wireless in my PC

  • Step 1 : Removed the bcmwl-kernel-source package

    sudo apt-get remove bcmwl-kernel-source
    
  • Step 2 : Installed the firmware-b43-installer package.

    sudo apt-get install firmware-b43-installer
    

And then rebooted my PC .

Finally got my work done. :)

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Thanx @Jorge... –  Sam May 11 '12 at 19:47

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