I recently installed windows 8.1 along with ubuntu 12.04 lts on my dell xps l502x machine. Since, the installation of windows 8.1, the control switch for bluetooth which was same for wifi doesn't work. I mean that now with Fn+F2, I can only toggle wifi and bluetooth always remains on. Also, after waking from suspend, bluetooth always turns on. Please can anyone give me a solution to fix this?