kernel-packages team mailing list archive

[Colin King <955287@xxxxxxxxxxxxxxxxxx>]

thermald is the defacto solution to this in Trusty+, I've added a
Wikipage to describe how to install and configure this daemon:

https://wiki.ubuntu.com/Kernel/PowerManagement/ThermalIssues

I think this addresses the bug, so I'm going to close it.

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

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https://bugs.launchpad.net/bugs/955287

Title:
  Ubuntu should handle "hot" CPUs by taking preemptive action and
  warning users

Status in “linux” package in Ubuntu:
  Fix Released

Bug description:
  If the kernel detects your CPU(s) is/are too hot currently (see bug
  751689), the kernel calls /sbin/poweroff. This will provide a
  "graceful" system shutdown. If /sbin/poweroff fails, the kernel just
  forcibly shuts the system down. However, both strategies are last
  resorts and are called when the system temperature has reached a
  critical level.

  However, the kernel seems to emit an ACPI event when it detects the
  CPU(s) are merely "hot". I suggest we consider adding an acpi hook to
  attempt to avoid a "critical" scenario.

  Currently, the user experience when "critical" gets hit is not good -
  the system just shuts down with no warning whatsoever. This is
  alarming in the extreme to users.

  Ideas:

  - proactively attempt to kill off power hogging processes (use powertop?)
  - ramp fans to maximum and present the user with a warning window explaining what is happening.
  - present the user with a window of high-power processes and ask *them* to select the processes they'd like to kill off in an effort
    to avoid a system shutdown.

  Problems:

  - it is unclear (to me atleast) how close (in terms of degrees
  centigrade) "hot" and "critical" are (is it different for all CPUs ?)
  As such, it is unclear how long (time) it might take for a system that
  is hot to go critical and just shutdown.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: acpi-support 0.140
  ProcVersionSignature: Ubuntu 3.2.0-18.29-generic-pae 3.2.9
  Uname: Linux 3.2.0-18-generic-pae i686
  NonfreeKernelModules: nvidia
  ApportVersion: 1.94.1-0ubuntu2
  Architecture: i386
  Date: Wed Mar 14 17:22:09 2012
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, user)
   LANG=fr_CA.UTF8
   SHELL=/bin/bash
  SourcePackage: acpi-support
  UpgradeStatus: Upgraded to precise on 2012-01-12 (62 days ago)
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.94.1-0ubuntu2
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  james      3788 F.... pulseaudio
   /dev/snd/controlC0:  james      3788 F.... pulseaudio
                        james     10267 F.... alsamixer
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf2420000 irq 45'
     Mixer name	: 'Conexant CX20585'
     Components	: 'HDA:14f15069,17aa214c,00100302 HDA:14f12c06,17aa2122,00100000'
     Controls      : 9
     Simple ctrls  : 6
  Card1.Amixer.info:
   Card hw:1 'NVidia'/'HDA NVidia at 0xcdefc000 irq 16'
     Mixer name	: 'Nvidia GPU 0b HDMI/DP'
     Components	: 'HDA:10de000b,10de0101,00100100'
     Controls      : 24
     Simple ctrls  : 4
  Card29.Amixer.info:
   Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 6IHT37WW-1.12'
     Mixer name	: 'ThinkPad EC 6IHT37WW-1.12'
     Components	: ''
     Controls      : 1
     Simple ctrls  : 1
  Card29.Amixer.values:
   Simple mixer control 'Console',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  DistroRelease: Ubuntu 12.04
  HibernationDevice: RESUME=UUID=67e3cd44-242b-4bbf-918b-28fff81e0312
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
  MachineType: LENOVO 2516CTO
  NonfreeKernelModules: nvidia
  Package: linux (not installed)
  ProcEnviron:
   TERM=xterm
   PATH=(custom, user)
   LANG=fr_CA.UTF8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-18-generic-pae root=UUID=7ad192e9-7b26-49d1-8e1c-fefc7dc495cb ro acpi_sleep=nonvs console=ttyUSB0,115200n8r console=tty quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-18.29-generic-pae 3.2.9
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-18-generic-pae N/A
   linux-backports-modules-3.2.0-18-generic-pae  N/A
   linux-firmware                                1.71
  StagingDrivers: mei
  Tags:  precise staging
  Uname: Linux 3.2.0-18-generic-pae i686
  UpgradeStatus: Upgraded to precise on 2012-01-12 (62 days ago)
  UserGroups: adm admin cdrom dialout libvirtd lpadmin plugdev sambashare sbuild
  dmi.bios.date: 08/27/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6IET72WW (1.32 )
  dmi.board.name: 2516CTO
  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:bvr6IET72WW(1.32):bd08/27/2010:svnLENOVO:pn2516CTO:pvrThinkPadT410:rvnLENOVO:rn2516CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2516CTO
  dmi.product.version: ThinkPad T410
  dmi.sys.vendor: LENOVO

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