I can also confirm this problem. This never used to happen to me. The only difference is that I am now using WPA instead of WEP security. This may have something to do with WPA_Supplicant if other people have this issue and they also use WPA.
I tried restarting networking and no luck. I looked in syslog and saw some items that makes you think the wireless device no longer exists after hibernate. This could also just be a borked recent update as well. -- When returning from hibernate/suspend network manager fails to connect to a wireless network https://launchpad.net/bugs/83338 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
