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[Bug 1452460] Re: Turbo mode on i7 is not enabled upon resume


Jasper, the next step is to fully reverse commit bisect from kernel 3.19
to 4.1-rc2 in order to identify the last bad commit, followed
immediately by the first good one. Once this commit has been identified,
then it may be reviewed as a candidate for backporting into your
release. Could you please do this following

Please note, finding adjacent kernel versions is not fully commit

Thank you for your understanding.

Helpful bug reporting tips:

** Tags added: kernel-bug-fixed-upstream needs-reverse-bisect

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  Turbo mode on i7 is not enabled upon resume

Status in linux package in Ubuntu:

Bug description:
  Turbo mode is not enabled upon resume from suspend.

  To enable I must issue:

  ``echo 0 | sudo tee /sys/devices/system/cpu/intel_pstate/no_turbo
  echo 1 | sudo tee /sys/devices/system/cpu/intel_pstate/no_turbo
  echo 0 | sudo tee /sys/devices/system/cpu/intel_pstate/no_turbo``

  I would expect that Turbo was re-enabled by default from resume.

  I created a script in /usr/lib/pm-utils/sleep.d/ to issue the above
  commands, but clearly that mechanism is depreciated.

  I am reporting this bug against systemd as I assume that it is
  managing the running of startup and resume scripts.

  A quick hack solution would be appreciated in the short term.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: systemd 219-7ubuntu4
  Uname: Linux 4.0.0-040000rc7-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Thu May  7 09:11:12 2015
  InstallationDate: Installed on 2015-04-14 (22 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
  MachineType: Acer Aspire S7-392
  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-4.0.0-040000rc7-generic root=UUID=57b63ba3-bc33-40b5-931f-8654d6c5cab4 ro rootflags=subvol=@ noprompt persistent quiet splash vt.handoff=7
  SourcePackage: systemd
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/20/2014
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V2.12
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Storm2
  dmi.board.vendor: Acer
  dmi.board.version: V2.12
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V2.12
  dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.12:bd05/20/2014:svnAcer:pnAspireS7-392:pvrV2.12:rvnAcer:rnStorm2:rvrV2.12:cvnAcer:ct10:cvrV2.12:
  dmi.product.name: Aspire S7-392
  dmi.product.version: V2.12
  dmi.sys.vendor: Acer

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