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I was running 11.xx with the internal b43 wireless.
I have followed all the suggested install b43-fwcuttter firmware-b43-installer etc. removed blacklist.conf entry for b43
removed bcmwl-kernel-source


give me back ubuntu 10 !!

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marked as duplicate by Jorge Castro, Basharat Sialvi, Radu Rădeanu, bcbc, Mitch May 31 '13 at 19:21

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.

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 May 4 '12 at 16:31

I'm going to go a completely different route on this answer. I have had 7 old Dell workhorse laptops ( 600, 610, 620, 6000 all still in use by family and friends) and all running Ubuntu. The first thing I do with all of them is go to Ebay and order the Intel wireless card that was an option (they all had one). I decided it was just easier to never ever have to worry about a driver or upgrade again. I have never paid more than $10 shipped and it seems well worth it. They swap out with a small philips screw driver in about 5 minutes. This answer won't get your running this afternoon so don't expect it to be accepted but as a long term solution I highly recommend it.

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Sounds good. What model of Intel Wireless card did you get ? – beemanned May 4 '12 at 18:28
Just ordered one. I will give it a go. The D620 has been a workhorse, but the wireless was always the thorn. Thanks again. – beemanned May 4 '12 at 18:44
There were a couple of different ones based on the particular model of computer. I remember it being quite easy to find by searching. Hope it works as well for you as it has for me. – Dennis May 4 '12 at 20:16

I have some moral issues with an OS dictating a hardware purchase, especially when the previous [downgraded] version ran the hardware, there's just no excuse for this, I did however use old fashioned instinct and opened up the Synaptic package mangler [pun intended] and typed in Dell. Lo and behold it's a chip-set problem!

After installing the montage of dell system drivers and especially the chipset update whammo!! The wifi card works like a champ. I didn't know Dell had apt-get goodies in our repos but then again something told me to look.

Dell Latitude D620, wn3945ABG wifi card.

Pop out the keyboard and look under it [upper right] if you're in doubt of yours.

Now if your wifi is a different flavor , Broadcom, Lynksys etc... This still might help, Chipset is important for integer and DMA addressing of hardware.

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