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

Possible Duplicate:
How do I install BCM43142 wireless drivers for Dell Vostro 3460/3560?

I just bought new Dell Vostro 3560 with Ubuntu 11.10 and when I upgareded it to 12.04 LTS I lost my wifi card. System doesnt see my wifi cards so im not able to install any drivers, etc.

share|improve this question

marked as duplicate by jokerdino, John S Gruber, Mitch, stephenmyall, Jorge Castro Aug 25 '12 at 12:56

This question was marked as an exact duplicate of an existing question.

    
Have you checked the wireless hardware switch? – Mitch Jul 2 '12 at 14:45
    
Welcome to Ask Ubuntu! We need more hardware information to help you, can you look at this question and then edit your question adding the information. – Jorge Castro Jul 8 '12 at 22:09
    
The same problem. WIFI doesn't work on 12.04, but worked on 11.10 that came preinstalled. I switched to Win7 because of it :( – Zelid Aug 12 '12 at 8:23

In terminal run

lspci |grep Network

If output is similar to this:

Network controller: Broadcom Corporatrion Device 4365 (rev 01)

or another Broadcom chipset 43xx series, follow this solution:

share|improve this answer

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