I'm on a 2011 8,3 MacBook Pro running Ubuntu 11.10 amd64.

I've been using the Bluetooth card in my machine perfectly for a long time. All of sudden, for no apparent reason, the Bluetooth device is gone. hcitool dev shows no devices at all.

What on earth happened? How can I find my Bluetooth card and get it working again? The only thing I did was install b43 from a compat-wireless, as I had to compile it myself. Is there something I did wrong there? How can I tell what the problem is and fix it?


This is, as it turns out, an Apple problem. You need to reset the Intel SMC as according to this guide.

Simply follow these steps:

  1. Shut down the computer.
  2. When it's off and is plugged into a power source, hold the left Shift, Control, and Alt/Option buttons down. Then, hold down the power button.
  3. The computer won't turn on, don't worry. Hold all 4 buttons for about 5 seconds, then let them go at the same time.
  4. Next, hit the power button.

It should work, now. Wow, Apple, wow.

  • is this only for apple computers ? or there are other tricks on pc hosts ? – rzr May 18 '13 at 9:47
  • Usually, if I have a problem with Bluetooth on a Desktop, it helps to shut down the PC, turn off the power supply, wait a bit, then flip it back on again and restart. Usually has to do with an EFI/BIOS problem with the Bluetooth hardware. – Naftuli Kay May 20 '13 at 2:55

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