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How to Install Broadcom / STA Wireless card (BCM43XX)

My previous question about this issue had been closed, and I had been directed to this link. I read through it all day, but none of the solutions over there helped. I still can't even switch the wireless adapter on. The only working wireless module is Bluetooth. I know for a fact that the wireless adapter is not faulty, because after having asked this question, I installed Windows and it worked flawlessly. I just decided to give Ubuntu another shot.

Here's the story: on my Dell Inspiron N4050, I upgraded from the preinstalled 10.10 to 11.04 then 11.10. Then I installed the proprietary driver through Additional Drivers. Since then, the wireless card just stopped working completely, and won't even switch on. Not even a clean, fresh installation of 12.04 fixed it.

So what now? Should I take it in for warranty replacement?

Here's the relevant output of lspci:

09:00.0 Network controller: Broadcom Corporation Device 4365 (rev 01)
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marked as duplicate by Luis Alvarado, bodhi.zazen, Takkat, Seth, Eric Carvalho Feb 6 '13 at 1:46

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
Start by typing lspci in a terminal, identify your wireless card and edit your question with this information. –  To Do Dec 9 '12 at 16:37
    
Please post the output of sudo rfkill list. –  gertvdijk Dec 28 '12 at 14:21
    
The answer by jasmine.aura to this question (askubuntu.com/questions/178352/…) may help. –  Chris Wilson Feb 5 '13 at 23:18
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1 Answer 1

What's your kernel version?

Type: uname -r. If it's 3.2 something try to install this package.

If it's not 3.2 or it doesn't work, please take a look at this.

To do things the safe way , here's the package author site, among with it's source and compiled deb.

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Please clarify why to link to an external .deb file on a Dropbox location. Sounds suspicious to me. –  gertvdijk Dec 28 '12 at 14:24
    
It was linked in the other question, the second link i posted. They said the wifi worked with this package. –  ThiagoPonte Dec 28 '12 at 17:18
    
Use common sense. Don't install random packages from untrusted sources. –  gertvdijk Dec 28 '12 at 17:33
    
I did a search here on askubuntu, and that solution showed up. I didn't thought of security risks. Thanks for the warning! Added a link with the source of the deb file. –  ThiagoPonte Dec 28 '12 at 17:40
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