[ubuntu] switching on wireless on sony vaio sz dont work

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http://ubuntuforums.org – hi there all - i have a sony vaio sz3hp/b and it has a phisical switch for the wireless and bluetooth. the issue is that when ubuntu is started with the switch on both wireless and bluetooth are recognised and work perfectly but if i switch it on after ubuntu started than only the bluetooth is recognised - the wireless suggest the 'device is not ready' any ideas? even a command that i can use to avoid restarting the laptop everytime i switch to wireless network? (Hardware)