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I have install Ubuntu 12.04 on my machine and I have problem with wireless. On system settings > web, I can not switch it on.

I have tried:

sudo apt-get remove bcmwl-kernel-source
sudo apt-get install bcmwl-kernel-source

but it does't work for me. I have had Ubuntu 11.04 before and there wifi works fine.

Any help would be appreciated.

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try the solution taken from this post

If the wireless is stuck as if disabled by hardware (it happens in some laptops when you use the wireless button a lot) and you cannot physically enable it, try in Terminal:

sudo rfkill unblock all && list all
  • It doesn't change anything. – Mateusz Rogulski Oct 6 '12 at 11:31
  • There are no output but after this command I can swich on wifi by Fn Key combination, Thanks! – Mateusz Rogulski Oct 6 '12 at 11:43

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