I have recently installed ubuntu 12.04 in sony vaio VPCEH. And updated all the available updates through update manager. When i switch on the bluetooth/wireless (hardware switch), only the bluetooth is turning on. For wireless, it shows as "hardware disabled". P.S: It was working fine few days before. Suddenly It is not turning on. i just get an answer for this question while googling. just enter the following command in the terminal. "sudo rfkill unblock all" This will unblock all hardware ports. that's it!!!!!! :) It works,..