I purchased a new system Dell inspirion15 with ubuntu 12.04 OS. Everything was fine, then suddenly my wifi connection went off.
I do not see the signal strength on the wifi symbol nor any options for available networks which are present. The Fn+F2 option switches on/off the bluetooth but no effect on the wifi. I do not have any other external option for wifi settings.
I have tried the following:
$ rfkill list soft blocked :no hard blocked:no $ rm -r ~/.config/ ~/.cache/
and restarted my system but no use.
$ sudo /etc/init.d/network-manager restart
no use either.
Hoping for some suggestions.