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Public bug reported:

I also reported this upstream
(https://bugzilla.kernel.org/show_bug.cgi?id=117481), just reporting
this here so that the upstream fix does not get lost in the noise:

Symptoms:

- With a freshly installed Ubuntu 16.04 (but also occurs using the live CD/USB) on a 2016 Macbook Pro (hardware version MacBookPro11,2) CPU core is 80-90% pegged with kworker:
12772 root      20   0       0      0      0 R  84,1  0,0  15:37.79 kworker/0:6

- When doing grep . -r /sys/firmware/acpi/interrupts/ I see a lot of interrupts on gpe06:
/sys/firmware/acpi/interrupts/gpe06:222309848   enabled

- Disabling gpe06 frees up the core without any noticeable side-effects:
# echo disable > /sys/firmware/acpi/interrupts/gpe06

I put the above in the root crontab with @reboot which solved the
problem for me for now.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-21-generic 4.4.0-21.37 [modified: boot/vmlinuz-4.4.0-21-generic]
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  gpanther   1623 F.... pulseaudio
 /dev/snd/controlC0:  gpanther   1623 F.... pulseaudio
CurrentDesktop: GNOME
Date: Tue May  3 06:19:04 2016
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=07c7cd27-bf38-466e-afd8-33e34c38dea5
InstallationDate: Installed on 2016-04-30 (2 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
MachineType: Apple Inc. MacBookPro11,2
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.4.0-21-generic.efi.signed root=UUID=839f9a24-3946-4d31-894c-df7e6b4573cb ro rootflags=subvol=@ noprompt libata.force=noncq quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-21-generic N/A
 linux-backports-modules-4.4.0-21-generic  N/A
 linux-firmware                            1.157
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/22/2016
dmi.bios.vendor: Apple Inc.
dmi.bios.version: MBP112.88Z.0138.B17.1602221600
dmi.board.asset.tag: Base Board Asset Tag#
dmi.board.name: Mac-3CBD00234E554E41
dmi.board.vendor: Apple Inc.
dmi.board.version: MacBookPro11,2
dmi.chassis.type: 10
dmi.chassis.vendor: Apple Inc.
dmi.chassis.version: Mac-3CBD00234E554E41
dmi.modalias: dmi:bvnAppleInc.:bvrMBP112.88Z.0138.B17.1602221600:bd02/22/2016:svnAppleInc.:pnMacBookPro11,2:pvr1.0:rvnAppleInc.:rnMac-3CBD00234E554E41:rvrMacBookPro11,2:cvnAppleInc.:ct10:cvrMac-3CBD00234E554E41:
dmi.product.name: MacBookPro11,2
dmi.product.version: 1.0
dmi.sys.vendor: Apple Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug xenial

-- 
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1577629

Title:
  Problems with gpe06 interrupt storm on a 2016 Macbook Pro

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I also reported this upstream
  (https://bugzilla.kernel.org/show_bug.cgi?id=117481), just reporting
  this here so that the upstream fix does not get lost in the noise:

  Symptoms:

  - With a freshly installed Ubuntu 16.04 (but also occurs using the live CD/USB) on a 2016 Macbook Pro (hardware version MacBookPro11,2) CPU core is 80-90% pegged with kworker:
  12772 root      20   0       0      0      0 R  84,1  0,0  15:37.79 kworker/0:6

  - When doing grep . -r /sys/firmware/acpi/interrupts/ I see a lot of interrupts on gpe06:
  /sys/firmware/acpi/interrupts/gpe06:222309848   enabled

  - Disabling gpe06 frees up the core without any noticeable side-effects:
  # echo disable > /sys/firmware/acpi/interrupts/gpe06

  I put the above in the root crontab with @reboot which solved the
  problem for me for now.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-21-generic 4.4.0-21.37 [modified: boot/vmlinuz-4.4.0-21-generic]
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  gpanther   1623 F.... pulseaudio
   /dev/snd/controlC0:  gpanther   1623 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Tue May  3 06:19:04 2016
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=07c7cd27-bf38-466e-afd8-33e34c38dea5
  InstallationDate: Installed on 2016-04-30 (2 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  MachineType: Apple Inc. MacBookPro11,2
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.4.0-21-generic.efi.signed root=UUID=839f9a24-3946-4d31-894c-df7e6b4573cb ro rootflags=subvol=@ noprompt libata.force=noncq quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-21-generic N/A
   linux-backports-modules-4.4.0-21-generic  N/A
   linux-firmware                            1.157
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 02/22/2016
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: MBP112.88Z.0138.B17.1602221600
  dmi.board.asset.tag: Base Board Asset Tag#
  dmi.board.name: Mac-3CBD00234E554E41
  dmi.board.vendor: Apple Inc.
  dmi.board.version: MacBookPro11,2
  dmi.chassis.type: 10
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-3CBD00234E554E41
  dmi.modalias: dmi:bvnAppleInc.:bvrMBP112.88Z.0138.B17.1602221600:bd02/22/2016:svnAppleInc.:pnMacBookPro11,2:pvr1.0:rvnAppleInc.:rnMac-3CBD00234E554E41:rvrMacBookPro11,2:cvnAppleInc.:ct10:cvrMac-3CBD00234E554E41:
  dmi.product.name: MacBookPro11,2
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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