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When I boot up my Lenevo V570 to ubuntu 11.10 then it shows me 'Wireless hardware switch off' however when i use windows and then reboot ubuntu then it works properly.

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up vote 0 down vote accepted

What does your rfkill list say?

Try to type into your terminal 'rfkill unblock wifi' or 'rfkill unblock wlan'. You might need to execute this as root ('sudo').

Good luck.

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