[ubuntu] Bluetooth worked once -- just once... How do I diagnose/fix problem?

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http://ubuntuforums.org – I never really had a use for bluetooth, so I've been ignoring it thus fat. I recently decided, however, to hook up a bluetooth headset so that I can use empathy, google talk, google domain apps, gtalk2voip.com and gizmo5.com to make free calls without using my cellphone. With all the problems I'm having with making that work aside, I felt a bit of comfort knowing that my bluetooth worked in Ubuntu 9.10. After a reset, however, this is not the case anymore... The icon is gray, but when I click on it it says, "bluetooth: on." When I go to preferences everything is grayed out, and I can't do anything... WTF?! I'm on Ubuntu 9.10, and a sony vaio vgn-tz150n (which, supposedly, has working bluetooth under ubuntu.) My stuff is broken and search has not given me any clues on how I should go about fixing it. (Hardware)