I have a built in wireless (with a switch & light on hardware for it) its a Sony Vaio E-series with ubuntu running along side windows 7, the button in the menu for enable wireless is greyed out, and in edit connections window, when i click the button to make it 'ON' it turns it 'off' immediately while the wireless button is switched on & the wireless light flashes once for 3 seconds(light on hardware),

wireless works perfectly and the light stays on (solid) on windows 7, and it works fine with wired connection on Ubuntu, 1st time I am trying a Linux OS, everything else works perfectly.