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[Oliver Joos <1504751@xxxxxxxxxxxxxxxxxx>]

I have here two HP Compaq nx8220 which are affected by this bug. They
have a Pentium M (32bit).

I see this bug since kernel 3.19.0-32-generic and also with 4.2.0-19-generic (newest Ubuntu Kernel)
With Kernels 3.13.x and 3.16.x resume works and fan stays calm.
In the forums some says that this bug first appeared in kernel 3.17.x: http://ubuntuforums.org/showthread.php?t=2294906

=== My current workaround ===
Create a new file /usr/lib/pm-utils/sleep.d/99calm_fans that contains:
__________________________________
#!/bin/sh
case "${1}" in
  hibernate|suspend)
    ;;
  thaw|resume)
    # Calm fans after resume (bug in kernel >= 3.17.x)
    for dev in /sys/class/thermal/cooling_device[0-9] ; do
      echo -n 0 >${dev}/cur_state
      # sleep 2
    done
    ;;
  *)
    #exit $NA
    ;;
esac
__________________________________

And set execution bits by:
sudo chmod 755 /usr/lib/pm-utils/sleep.d/99calm_fans

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https://bugs.launchpad.net/bugs/1504751

Title:
  [HP Probook 4510s] Fan at full speed after suspend

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  When I turn on the PC, the fan runs normally and I have no issues at
  all. However, if I suspend the computer and resume it, the fan runs at
  full speed, regardless of the actual internal temperature. This is
  very annoying in libraries.

  This bug has been around for years, I just didn't need the computer in quiet places back then, so I never reported it.
  I believe it didn't happen with Maverick.

  I'm running Ubuntu 15.10, with Linux 4.2.0-14-generic x86_64
  (systemd).

  Other (probably) useful information:
  https://bugzilla.redhat.com/show_bug.cgi?id=895276
  https://bbs.archlinux.org/viewtopic.php?id=89235
  https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1173997

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-14-generic 4.2.0-14.16
  ProcVersionSignature: Ubuntu 4.2.0-14.16-generic 4.2.2
  Uname: Linux 4.2.0-14-generic x86_64
  ApportVersion: 2.19.1-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  davideddu   3441 F.... pulseaudio
   /dev/snd/seq:        timidity    971 F.... timidity
  Date: Sat Oct 10 12:17:48 2015
  HibernationDevice: RESUME=UUID=91dfd5b8-4d71-4adf-bef2-b614d3874c91
  InstallationDate: Installed on 2014-12-07 (306 days ago)
  InstallationMedia: Ubuntu-GNOME 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  MachineType: Hewlett-Packard HP ProBook 4510s
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-14-generic.efi.signed root=UUID=64da7c2d-9769-48ec-b34b-22339a33c767 ro quiet splash vt.handoff=7
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-4.2.0-14-generic N/A
   linux-backports-modules-4.2.0-14-generic  N/A
   linux-firmware                            1.149
  SourcePackage: linux
  UpgradeStatus: Upgraded to wily on 2015-09-15 (24 days ago)
  dmi.bios.date: 12/09/2011
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 68PZI Ver. F.20
  dmi.board.name: 3072
  dmi.board.vendor: Hewlett-Packard
  dmi.board.version: KBC Version 24.0F
  dmi.chassis.asset.tag: CNU0114QT2
  dmi.chassis.type: 10
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr68PZIVer.F.20:bd12/09/2011:svnHewlett-Packard:pnHPProBook4510s:pvrF.20:rvnHewlett-Packard:rn3072:rvrKBCVersion24.0F:cvnHewlett-Packard:ct10:cvr:
  dmi.product.name: HP ProBook 4510s
  dmi.product.version: F.20
  dmi.sys.vendor: Hewlett-Packard

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