[ubuntu] Wifi problem

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http://ubuntuforums.org – I've a problem with wifi on my Ubntu 12.04 It's connected, but actually there is no connection. When i try to access some site or similar thing I get error page. Everything is fine with wireless connection, because it works on my other computer. What can cause this problem? Drivers? Or something else? More about my computer specifications, and more about wireless problem: http://ubuntuforums.org/showthread.p...9#post12720459 (Hardware)