Reproes with the v4.14 kernel.
Power usage on idle is
4.14:~8W
4.13:~10W
4.10:~7W
There appears to have been a significant regression in power use from
4.10 to 4.13 that has been partially addressed in 4.14.
I got curious, and I get the same 100% busy report if I boot with the
legacy 4.10.37 kernel now (whereas I did not before), so this might be
an issue with powertop as upgraded with 17.10 and the bt driver might be
a red herring. Is there a more reliable way to measure power usage?
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1723777
Title:
Apple bluetooth USB driver is 100% busy despite BT switched off
Status in linux package in Ubuntu:
Confirmed
Bug description:
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:
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