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Upon updating my 10.10 netbook to 11.04 on the first startup it froze. I checked the forums and found that disabling wlan in BIOS fixes the problem so I did that and it worked, system was ok and it didn't freeze but then I had no wireless.

I know that Broadcom STA driver is to blame cause I removed it from "additional drivers" and enabled back in bios wlan and everything worked fine (exept no wireless cause no driver is activated).

Enabling Broadcom STA in the additional drivers again and restarting wireless was up and it found my network and connected to it but in a matter of seconds netbook froze.

Can you please help me...

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Take a look at this Q&A, especially down towards the end with the link regarding blacklisting. –  boehj May 16 '11 at 8:11
    
This question should instead be filed as a bug report, thanks! Instructions here. –  Jorge Castro Feb 4 '12 at 20:05
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closed as off topic by Marco Ceppi Feb 4 '12 at 21:06

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1 Answer

I would always recommend remove all the old sta packages and reinstalling as you have a new linux kernel

In a terminal, do:
sudo apt-get purge bcmwl-kernel-source
then do
sudo apt-get install bcmwl-kernel-source

This will then rebuild your driver for your NEW kernel

Let us know how you get on

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