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[Bug 1283384] Re: regression: Lenovo T420s idle power consumption 7W->12W


Timo Aaltonen, could you please bisect from Saucy to Trusty in order to
identify the offending commit following
https://wiki.ubuntu.com/Kernel/KernelBisection ?

** Tags added: bios-outdated-1.38 needs-bisect regression-release

** Summary changed:

- regression: Lenovo T420s idle power consumption 7W->12W
+ [Lenovo ThinkPad T420s] regression idle power consumption 7W->12W

** Changed in: linux (Ubuntu)
   Importance: Undecided => Low

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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  [Lenovo ThinkPad T420s] regression idle power consumption 7W->12W

Status in “linux” package in Ubuntu:

Bug description:
  Hi, didn't notice this before but looks like my laptop is consuming a
  lot more power than on saucy, and it's not caused by i915 locked on to
  higher gpu frequency (checked

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-11-generic 3.13.0-11.31
  ProcVersionSignature: Ubuntu 3.13.0-11.31-generic 3.13.3
  Uname: Linux 3.13.0-11-generic x86_64
  ApportVersion: 2.13.2-0ubuntu5
  Architecture: amd64
   /dev/snd/controlC0:  tjaalton   2952 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Feb 22 11:27:13 2014
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2011-09-12 (893 days ago)
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
  MachineType: LENOVO 4170CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-11-generic root=UUID=d855f499-6e26-4f5c-89df-81bcf94082bd ro quiet splash vt.handoff=7
   linux-restricted-modules-3.13.0-11-generic N/A
   linux-backports-modules-3.13.0-11-generic  N/A
   linux-firmware                             1.125
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2013-12-11 (72 days ago)
  dmi.bios.date: 09/13/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 8CET55WW (1.35 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 4170CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr8CET55WW(1.35):bd09/13/2012:svnLENOVO:pn4170CTO:pvrThinkPadT420s:rvnLENOVO:rn4170CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 4170CTO
  dmi.product.version: ThinkPad T420s
  dmi.sys.vendor: LENOVO

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