The driver that reports the status of the wireless devices finally calls
to an BIOS SMI handler, which is a proprietary and a blackbox. This need
to be fixed by BIOS.

However, clearing the bluetooth status (BIT 3 & BIT 9) in the "rfkill"
driver does not fix the BT icon in task panel.

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https://bugs.launchpad.net/bugs/834589

Title:
  [Dell Vostro 1440, Dell Inspiron M4040] BIOS reports the wrong
  availability of bluetooth

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