<div>Thanks for answering, cuz i'm really desperate to solve this problem, cuz it's the only pc in which I can use Ubuntu and it doesn't wan't to connect ...</div>
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<div>You've probably heard this model of router or modem (I really don't know which one is it ) having this same problem:</div>
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<div>Efficients Networks SpeedStream 5200</div>
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<div>See what you can do, since I find nothing.</div>