I am experiencing the same issue my Lenovo P50. It doesn't work most of
the time at boot.

workaround:
rmmod btusb ; modprobe btusb

kernel messages when it fails:
[    8.523061] Bluetooth: hci0: Minimum firmware build 1 week 10 2014
[    8.525271] Bluetooth: hci0: Found device firmware: intel/ibt-11-5.sfi
[    8.532355] Bluetooth: hci0: Failed to send firmware data (-38)
[   10.608812] Bluetooth: hci0: Reading Intel version information failed (-110)
[   10.612778] Bluetooth: hci0 command tx timeout

kernel messages post reload of the btusb module:
[  712.576916] Bluetooth: hci0: Firmware revision 0.0 build 90 week 25 2015
[  767.110199] Bluetooth: hci0 urb ffff88073c4c0540 failed to resubmit (2)

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https://bugs.launchpad.net/bugs/1553694

Title:
  Lenovo Y700-17ISK: Bluetooth issues

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