I had the same experience with the dell vostro 3300, killing the dell_laptop module brought everything back alive.
sudo rmmod -f dell_laptop if so then this is a duplicate of bug 701259 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/775174 Title: [Dell Vostro 1015] Turning off wi-fi with the hotkey (Fn+F11) permanently kills wi-fi -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
