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[Bug 1535426] Re: CPU runs at high speed after upgrade


More powertop. It's clearly misreporting, and I'm fairly sure the
outstanding power must be going into the CPU, as that's the part of the
system that's physically hot to the touch.

Power est.              Usage       Events/s    Category       Description
  4.21 W     15.2%                      Device         Display backlight
  2.32 W    100.0%                      Device         Radio device: thinkpad_acpi
  1.58 W    100.0%                      Device         USB device: usb-device-138a-0017
  523 mW     10.5 pkts/s                Device         Network interface: wlan0 (iwlwifi)
  278 mW     32.9 ms/s      18.4        Process        /usr/lib/thunderbird/thunderbird

Also, this data implies that my backlight has a maximum power of 28
watts, which is false. It's about 5, measured on a nonbroken kernel/bios

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  CPU runs at high speed after upgrade

Status in linux package in Ubuntu:

Bug description:
  After a dist-upgrade from 15.04 to 15.10, moving from kernel 3.19.0-43
  to 4.2.0-23, my laptop CPU runs continuously at 3GHz, and never slows
  down to 800MHz, as it used to. This has reduced my battery life from
  24 hours to 8 hours.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-23-generic 4.2.0-23.28
  ProcVersionSignature: Ubuntu 4.2.0-23.28-generic 4.2.6
  Uname: Linux 4.2.0-23-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
   /dev/snd/controlC1:  shevek     2664 F.... pulseaudio
   /dev/snd/controlC0:  shevek     2664 F.... pulseaudio
  CurrentDesktop: XFCE
  Date: Mon Jan 18 11:38:29 2016
  HibernationDevice: RESUME=UUID=22fd2208-7557-432d-bbff-95dd97905323
  InstallationDate: Installed on 2015-05-18 (244 days ago)
  InstallationMedia: Xubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422.1)
  MachineType: LENOVO 20CKCT01WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-23-generic.efi.signed root=/dev/mapper/xubuntu--vg-root ro noprompt persistent quiet splash vt.handoff=7
   linux-restricted-modules-4.2.0-23-generic N/A
   linux-backports-modules-4.2.0-23-generic  N/A
   linux-firmware                            1.149.3
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: Upgraded to wily on 2016-01-17 (1 days ago)
  dmi.bios.date: 08/20/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N11ET34W (1.10 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20CKCT01WW
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98417 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrN11ET34W(1.10):bd08/20/2015:svnLENOVO:pn20CKCT01WW:pvrThinkPadT550:rvnLENOVO:rn20CKCT01WW:rvr0B98417WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20CKCT01WW
  dmi.product.version: ThinkPad T550
  dmi.sys.vendor: LENOVO

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