Why can't a device connect through a wireless after router restart?

Posted by Kalmar on Ask Ubuntu See other posts from Ask Ubuntu or by Kalmar
Published on 2012-11-29T16:05:43Z Indexed on 2012/11/29 17:18 UTC
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12.04

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wireless

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lubuntu

My laptop with lubuntu 12.04 used to connect to the wifi. But after the router (Cisco E4200) was restarted I cannot connect anymore through wireless connection. (No problem using a cable.) The network is hidden and secured by WPA/WPA2 Personal, I am the only person having this problem, so I guess it's somewhere on my side. What could cause such a problem, how to diagnose it and finally how to fix it?

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