Nevermind, closing. I can't reproduce this anymore, so it was probably not related to the kernel version.
** Changed in: linux (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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: Invalid 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 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1690395/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp