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[ubuntu] Wireless network connection lost on suspend

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http://ubuntuforums.org – Whenever I suspend my computer session, I lose my wireless network connection, and the only way I know to get it back is to restart. I am running Ubuntu 13.04 (Raring ringtail), and kernel 3.8.0-22-generic. I have a Centrino Advanced-N 6235 wireless network card, with driver iwlwifi version 3.8.0-22 generic. I have seen some reports of this problem in this Forum with various solutions suggested, and none of them work for me. Specifically, I have added a file called "config" to the /etc/pm/config.d directory, which specifies either SUSPEND_MODULES="iwlwifi" or "SUSP (Hardware)