hp tablet tc4200 wireless hardware switch does not work in ubuntu 12.04.4 lts

Initially I thought there was no driver,

Tried to reinstall all the drivers from the hp website in windows.

http://techie-buzz.com/foss/wifi-ubuntu-install-broadcom-drivers.html
This seem irrelevant because my wifi adapter was intel 2200

However this worked.
http://askubuntu.com/questions/9816/wireless-shows-up-as-disabled-how-can-i-get-it-working

on terminal,
$sudo rfkill unblock all

This resolved the problem.
if problem persists, edit /etc/rc.local and add line "rfkill unblock all" above exit 0


More info
 http://ubuntuforums.org/showthread.php?t=1781350&page=2
http://ubuntuforums.org/showpost.php?p=10745874&postcount=4