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[ubuntu] Wireless stopped working [Maverick]

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linux-howto

http://ubuntuforums.org – Hello, I'm using Maverick and since yesterday, my wireless hasn't been working. It was working before with Maverick and I don't recall doing any updates that might have changed wireless configurations. By "doesn't work" I mean it doesn't recognizes any networks, as if the wireless was turned off (there's this button on laptops, but it's turned on). I had that problem some time ago, but rebooting solved the problem, which, now, didn't. My laptop is a HP dv6420la. Where to start? (HowTos)