[Bug 1723777] [NEW] Apple bluetooth USB driver is 100% busy despite BT switched off

[Norse]

Public bug reported:

Just upgraded from 17.04 to 17.10 on a 2011 macbook air. 
Battery drain is markedly more severe.
Looking at powertop, the main difference is that the Apple USB Bluetooth driver is drawing ~2.5W and is showing as 100% busy.
Bluetooth is switched off.
I have tried rfkill, blacklisting btusb, modifying the /etc/bluetooth/main.conf to not autoenable and to set InitiallyPowered to false.
None of these work.

powertop output:

 2.58 W    100.0%                      Device         USB device:
Bluetooth USB Host Controller (Apple Inc.)

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: bluetooth (not installed)
ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4
Uname: Linux 4.13.0-16-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.7-0ubuntu3
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Oct 15 11:45:16 2017
InstallationDate: Installed on 2014-11-09 (1070 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
InterestingModules: bluetooth
MachineType: Apple Inc. MacBookAir4,2
ProcEnviron:
 LANG=en_US.UTF-8
 TERM=xterm-256color
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
 PATH=(custom, user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-16-generic.efi.signed root=UUID=58091989-ee9b-4c99-afa8-fffa56a1f3af ro quiet splash crashkernel=384M-:128M vt.handoff=7
SourcePackage: bluez
UpgradeStatus: Upgraded to artful on 2017-10-15 (0 days ago)
dmi.bios.date: 06/08/2015
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBA41.88Z.0077.B12.1506081728
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-742912EFDBEE19B3
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookAir4,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-742912EFDBEE19B3
dmi.modalias: dmi:bvnAppleInc.:bvrMBA41.88Z.0077.B12.1506081728:bd06/08/2015:svnAppleInc.:pnMacBookAir4,2:pvr1.0:rvnAppleInc.:rnMac-742912EFDBEE19B3:rvrMacBookAir4,2:cvnAppleInc.:ct10:cvrMac-742912EFDBEE19B3:
dmi.product.family: MacBook Air
dmi.product.name: MacBookAir4,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.
hciconfig:

** Affects: bluez (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug artful wayland-session

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Title:
  Apple bluetooth USB driver is 100% busy despite BT switched off

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