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Wireless connection disappeared

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http://www.linuxquestions.org – EEE 901, Ubuntu 12.10 Wireless was working. I left the machine for 20 minutes, and when I returned - no wireless. The wireless icon is empty and its message is Network Disconnected. The wireless light is happily blue. I tried rebooting both laptop and router. Wired is working. lspci: 00:00.0 Host bridge: Intel Corporation Mobile 945GSE Express Memory Controller Hub (rev 03) 00:02.0 VGA compatible controller: Intel Corporation Mobile 945GSE Express Integrated Graphics Controller (rev 03) 00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graph (HowTos)