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The situation I am in is a bit tricky. I am able to connect to my wifi router from my laptop but am not able to access internet. I had been using internet from the same modem and have no idea what suddenly went wrong. Three of my friends are still accessing internet from the same modem and have no problems.

I even tried to access internet from windows but again the same problem , am getting connected to the wifi network but cant access internet.

I have tried to ping my friends connected to the wifi network and also accessed the modem using wifi during which there were no problems.

Then I tried accessing internet by connecting to the modem/router using LAN cable instead, doing which I could access internet.

Please do help me out with the wifi internet problem

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Welcome to Ask Ubuntu! We need more hardware information to help you, can you look at this question and then edit your question adding the information. –  fossfreedom Dec 8 '12 at 8:04

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