Nexus 4 won't turn Bluetooth on My LG Nexus 4 runs stock Android 4.2.2. I use Bluetooth for phone calls with a one-ear headset (Plantronics M100).

Sometimes I notice in the power toggles menu that Bluetooth has turned OFF and when I go into the BT settings the slider is indeed set to OFF. When I touch the slider, it moves to ON but after a fraction of a second it quickly moves back to OFF.

Sometimes Bluetooth is even reported as ON but it still won't connect to any other BT device. In this state, I can turn BT off and then on again, but it doesn't resolve the problem.

Only a device restart seems to resolve this, so that I can turn BT on again. This happens every other day or so.

Is this a bug in Android? Is there something else interfering? How can I troubleshoot this?
Seem to be an Android bug. I found this in the Android bug tracker.

https://code.google.com/p/android/issues/detail?id=42520&amp;q=summary%3Abluetooth%20type%3Adefect&amp;sort=-stars&amp;colspec=ID%20Type%20Status%20Owner%20Summary%20Stars