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[ubuntu] ubuntu 12.04 suddenly stops connecting to internet via wifi

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linux-howto

http://ubuntuforums.org – HI, This happens often for my ubuntu 12.04. I'm using ubuntu on my laptop and connect to internet via wifi. Sometimes even though the connection is established with the modem I'm unable to connect to the internet. at that times I'm also unable to connect to 192.168.1.1, which should give me the page to my modem even if there is no internet connection to the modem. this is the reason for me to belive that ubuntu has a serious connectivity issue. Since I have dual boot on my laptop (ubuntu 12.04 + Windows 7) I start my system with windows 7 and the problem is gone and I'm able to con (Hardware)