** Changed in: linux (Ubuntu Eoan)
       Status: In Progress => Fix Committed

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https://bugs.launchpad.net/bugs/1853044

Title:
  5.3.0-23-generic causes fans to spin when idle

Status in linux package in Ubuntu:
  Fix Committed
Status in linux source package in Eoan:
  Fix Committed
Status in linux source package in Focal:
  Fix Committed

Bug description:
  SRU Justification

  Impact: "drm/i915/gen8+: Add RC6 CTX corruption WA" makes it
  effectively impossible to enter RC6 for some Intel GPUs when a display
  server is running. This results in increased energy usage and
  temperature.

  Fix: Upstream has changed too much to make the fixes there applicable,
  but Chris Wilson has provided a patch for 5.3, here:
  https://gitlab.freedesktop.org/drm/intel/issues/614#note_366057

  Test Case: See test results below. On an affected machine powertop
  will show increased RC6 usage on an idle desktop after the patch, and
  other symptoms of excessive power use should also subside.

  Regression Potential: The 5.3 patch is pretty straightforward, and
  only adds running of an existing delayed worker to retire GPU
  requests. No regressions have been reported in testing so far.

  ---

  After upgrading to 5.3.0-23-generic the fans in my machine don't stop
  running. They always sound like something is utilizing CPU - even with
  no applications running after boot.

  If I boot back to 5.3.0-19-generic it's fine.

  My microcode version is reported as 0xd4 and iucode-tool reports:

  iucode-tool: system has processor(s) with signature 0x000506e3

  Let me know if you need anything else.

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: linux-image-5.3.0-23-generic 5.3.0-23.25
  ProcVersionSignature: Ubuntu 5.3.0-23.25-generic 5.3.7
  Uname: Linux 5.3.0-23-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu8.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  dean       2898 F.... pulseaudio
   /dev/snd/pcmC2D0p:   dean       2898 F...m pulseaudio
   /dev/snd/controlC0:  dean       2898 F.... pulseaudio
   /dev/snd/controlC1:  dean       2898 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Nov 18 13:03:34 2019
  HibernationDevice: RESUME=UUID=55a42c82-50bf-4e75-a133-dbd3aa93611b
  InstallationDate: Installed on 2018-07-24 (482 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
(20180724)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.3.0-23-generic 
root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.3.0-23-generic N/A
   linux-backports-modules-5.3.0-23-generic  N/A
   linux-firmware                            1.183.2
  SourcePackage: linux
  UpgradeStatus: Upgraded to eoan on 2019-07-19 (121 days ago)
  dmi.bios.date: 05/16/2018
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: KYSKLi70.86A.0055.2018.0516.1629
  dmi.board.name: NUC6i7KYB
  dmi.board.vendor: Intel Corporation
  dmi.board.version: H90766-406
  dmi.chassis.type: 3
  dmi.chassis.vendor: Intel Corporation
  dmi.chassis.version: 1.0
  dmi.modalias: 
dmi:bvnIntelCorp.:bvrKYSKLi70.86A.0055.2018.0516.1629:bd05/16/2018:svn:pn:pvr:rvnIntelCorporation:rnNUC6i7KYB:rvrH90766-406:cvnIntelCorporation:ct3:cvr1.0:

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