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I am REALLY new to linux and I just installed Ubuntu 12.10 on my computer. When I try to connect to my wifi, I get a notification saying "wireless connection established". But when I open Mozilla Firefox, I can't browse the internet at all. It works just fine with a wired connection.

please PLEASE help me out):

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Please run lspci -nn. Edit your question to add the wireless device details. Thanks. –  chili555 Nov 18 '12 at 12:47

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