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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This change was made by a bot.

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

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https://bugs.launchpad.net/bugs/1451085

Title:
  Ivy Bridge laptop overheats with intel_pstate enabled

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Noticed my laptop getting hot over the last month or so.
  Investigating, I ran 'cpupower frequency-info' and found that all my
  cores were running at 2.8GHz pretty-much constantly despite being
  mostly idle.

  My laptop was using the intel_pstate module for CPU frequency
  governing.  I tried switching between powersave and performance
  governors but they both showed the same issue.

  Adding intel_pstate=disabled to my kernel command line switched over
  to using the acpi-cpufreq module and the ondemand governor.  With that
  enabled, my CPU is back down to 800MHz-1.1GHz at idle, as expected and
  it immediately stopped overheating.

  Bug 1188647 covered disabling intel_pstate a while ago while it was
  considered buggy but now it's enabled again, it seems to be causing
  problems for me.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-15-generic 3.19.0-15.15
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  shaun      1646 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat May  2 13:26:14 2015
  HibernationDevice: RESUME=UUID=e9e7a3d6-2d7f-4d2d-8880-ace10b4a942f
  InstallationDate: Installed on 2012-09-26 (948 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120905.2)
  Lsusb:
   Bus 003 Device 004: ID 2232:1024  
   Bus 003 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
   Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: SAMSUNG ELECTRONICS CO., LTD. 900X3C/900X3D/900X4C/900X4D
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.19.0-15-generic root=/dev/mapper/ubuntu-root ro quiet splash intel_pstate=disable vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-15-generic N/A
   linux-backports-modules-3.19.0-15-generic  N/A
   linux-firmware                             1.143
  SourcePackage: linux
  UpgradeStatus: Upgraded to vivid on 2015-04-24 (8 days ago)
  dmi.bios.date: 07/12/2012
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: P03AAC
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: SAMSUNG_NP1234567890
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: FAB1
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrP03AAC:bd07/12/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn900X3C/900X3D/900X4C/900X4D:pvr0.1:rvnSAMSUNGELECTRONICSCO.,LTD.:rnSAMSUNG_NP1234567890:rvrFAB1:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvr0.1:
  dmi.product.name: 900X3C/900X3D/900X4C/900X4D
  dmi.product.version: 0.1
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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