Public bug reported:

Once the CPU fan is turned on, it never turns back down, even when
things have already cooled down and CPU usage is low (<2%) for 5+
minutes.

The same cannot be reproduced with the previous kernel version
(4.10.0.19.21), on the same machine.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: linux-image-4.10.0-20-generic 4.10.0-20.22
ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
Uname: Linux 4.10.0-20-generic x86_64
ApportVersion: 2.20.4-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  fkung      2121 F.... pulseaudio
CurrentDesktop: GNOME
Date: Fri May 12 08:19:29 2017
HibernationDevice: RESUME=UUID=8e5a26ba-3ea3-4831-88ba-66803bdf9d45
InstallationDate: Installed on 2017-04-06 (35 days ago)
InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
Lsusb:
 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 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 20HR000FUS
ProcEnviron:
 TERM=screen-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-20-generic.efi.signed 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.10.0-20-generic N/A
 linux-backports-modules-4.10.0-20-generic  N/A
 linux-firmware                             1.164.1
SourcePackage: linux
UpgradeStatus: Upgraded to zesty on 2017-05-04 (7 days ago)
dmi.bios.date: 12/26/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: N1MET21W (1.06 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20HR000FUS
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: 
dmi:bvnLENOVO:bvrN1MET21W(1.06):bd12/26/2016:svnLENOVO:pn20HR000FUS:pvrThinkPadX1Carbon5th:rvnLENOVO:rn20HR000FUS:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20HR000FUS
dmi.product.version: ThinkPad X1 Carbon 5th
dmi.sys.vendor: LENOVO

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


** Tags: amd64 apport-bug zesty

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1690395

Title:
  CPU fan always on with kernel 4.10.0.20.22 (zesty) on a X1 Carbon 5th
  gen

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Once the CPU fan is turned on, it never turns back down, even when
  things have already cooled down and CPU usage is low (<2%) for 5+
  minutes.

  The same cannot be reproduced with the previous kernel version
  (4.10.0.19.21), on the same machine.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: linux-image-4.10.0-20-generic 4.10.0-20.22
  ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
  Uname: Linux 4.10.0-20-generic x86_64
  ApportVersion: 2.20.4-0ubuntu4
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  fkung      2121 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Fri May 12 08:19:29 2017
  HibernationDevice: RESUME=UUID=8e5a26ba-3ea3-4831-88ba-66803bdf9d45
  InstallationDate: Installed on 2017-04-06 (35 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  Lsusb:
   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 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 20HR000FUS
  ProcEnviron:
   TERM=screen-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.10.0-20-generic.efi.signed 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.10.0-20-generic N/A
   linux-backports-modules-4.10.0-20-generic  N/A
   linux-firmware                             1.164.1
  SourcePackage: linux
  UpgradeStatus: Upgraded to zesty on 2017-05-04 (7 days ago)
  dmi.bios.date: 12/26/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N1MET21W (1.06 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20HR000FUS
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40697 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrN1MET21W(1.06):bd12/26/2016:svnLENOVO:pn20HR000FUS:pvrThinkPadX1Carbon5th:rvnLENOVO:rn20HR000FUS:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20HR000FUS
  dmi.product.version: ThinkPad X1 Carbon 5th
  dmi.sys.vendor: LENOVO

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