Two things:

- Like mentioned in, the bug 
happens in other Lenovo models as well. It's not limited to the X1 Carbon 5th 
- The bug was fixed in kernel 4.13 but not in 4.10. This means that users who 
run the HWE kernel on Ubuntu 16.04 LTS will have this problem too!

I can reproduce it on my local system which has "linux-image-generic-
hwe-16.04" installed (

Reading through the comments, it's not exactly clear to me which of the
commits has fixed this problem, but I guess that the following two
changes have made the difference:

So, will this bug be reopened or should I create a separate issue for
the 16.04 HWE kernel?

** Bug watch added: Linux Kernel Bug Tracker #191181

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  CPU fan goes full throttle triggered by waking up from suspend on
  Lenovo X1 Carbon (5th Gen., 2017)

Status in linux package in Ubuntu:
Status in linux source package in Zesty:

Bug description:
  Thinkpad X1 Carbon 5th generation ultrabook with i7 Kabylake CPU
  running Ubuntu 17.04 has its fan go full steam if the laptop is woken
  up from sleep/suspend. Without any sleep/suspend the laptop's fan is
  basically "off" or silent, even for hours.

  The bug has been fixed upstream, see

  6625914 ACPI / EC: Drop EC noirq hooks to fix a regression
  9c40f95 Revert "ACPI / EC: Enable event freeze mode..." to fix a regression

  (with duplicate

  and I hope this fix will make its way into a near-future kernel update
  to ubuntu :)

  Many thanks!

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: linux-image-4.10.0-30-generic 4.10.0-30.34
  ProcVersionSignature: Ubuntu 4.10.0-30.34-generic 4.10.17
  Uname: Linux 4.10.0-30-generic x86_64
  ApportVersion: 2.20.4-0ubuntu4.5
  Architecture: amd64
   /dev/snd/controlC0:  micha      1783 F.... pulseaudio
  CurrentDesktop: Unity:Unity7
  Date: Wed Aug  9 12:55:20 2017
  HibernationDevice: RESUME=UUID=d258b78e-8853-44ea-adac-c2c837859e92
  InstallationDate: Installed on 2017-06-25 (44 days ago)
  InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 004: ID 138a:0097 Validity Sensors, Inc.
   Bus 001 Device 003: ID 04f2:b5ce Chicony Electronics Co., Ltd
   Bus 001 Device 002: ID 8087:0a2b Intel Corp.
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 20HQS03P00
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-30-generic.efi.signed 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
   linux-restricted-modules-4.10.0-30-generic N/A
   linux-backports-modules-4.10.0-30-generic  N/A
   linux-firmware                             1.164.1
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install) 07/04/2017
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N1MET37W (1.22 )
  dmi.board.asset.tag: Not Available 20HQS03P00
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
dmi:bvnLENOVO:bvrN1MET37W(1.22):bd07/04/2017:svnLENOVO:pn20HQS03P00:pvrThinkPadX1Carbon5th:rvnLENOVO:rn20HQS03P00:rvrNotDefined:cvnLENOVO:ct10:cvrNone: 20HQS03P00
  dmi.product.version: ThinkPad X1 Carbon 5th
  dmi.sys.vendor: LENOVO

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