Ubuntu – How to fix a “Wireless is disabled by hardware switch” error


I just updated to Ubuntu 12.04 from 11.10 but soon after updating I was disappointed to see that

Wireless is disabled by hardware switch.

I can not click the button 'Enable wireless' which is greyed out. Without wireless my computer is useless as I have to connect by wire which is not practical. I have a Acer TravelMate 4500

Best Answer

Same happened to me, simply resolved with:

rfkill unblock all

rfkill list all showed some devices on soft block.