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[Launchpad Bug Tracker <563815@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

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

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https://bugs.launchpad.net/bugs/563815

Title:
  Critical temperature reached (100 C), shutting down. throttling too
  little, too late.

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  [Workaround 1 (quick)]
  As a workaround the maximum cpu frequency can be limited:
  as root: echo 1333000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq; echo 1333000 > /sys/devices/system/cpu/cpu1/cpufreq/scaling_max_freq
  to check the current maximum frequency:
  grep . /sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq

  [Workaround 2 (preferred)]
  Clean the notebook. There is, in time, no way around this if the notebook is supposed to run with more than 1GHz on 100% load. There is massive dust caking between the fan and the cooling fins. 
  The main service hatch needs to be opened with a screwdriver. Then two screws for the fan need to be removed. The fan can then be moved away. The dust cake can then easily be removed.
  Caution, e.g. with regard to static electricity and loss of warranty, needs to be applied. The risk is entirely your own.
  Result of the cleaning operation: the temperature settles at a mere 70°C on 100% load (at the full 2.17 GHz) on a flat table at about 25°C room temperature.
  Conclusion: It would still be nice if temperature control were more agressive. This would also conceivably be advantageous when the notebook is not on a hard, flat surface and cooling is therefore hampered. And temperature control measures at over 90°C would never get in the way of normal operation anyway, where temperature does not get that high.

  [Report]
  Under heavy use the Acer Extensa 5630Z always overheats and shuts down. I noticed this in lucid, but karmic shows the same principal problem.
  The main culprit seems to be that the clock frequency is reduced too little and too late.
  It should reduce clock frequency more/sooner to avoid the forced shutdowns.

  ProblemType: Bug
  DistroRelease: Ubuntu 10.04
  Package: linux-image-2.6.32-20-generic 2.6.32-20.30
  Regression: No
  Reproducible: Yes
  ProcVersionSignature: Ubuntu 2.6.32-20.30-generic 2.6.32.11+drm33.2
  Uname: Linux 2.6.32-20-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  wolfgang   1230 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf4800000 irq 21'
     Mixer name	: 'Intel G45 DEVCTG'
     Components	: 'HDA:10ec0268,1025013c,00100101 HDA:14f12c06,10250093,00100000 HDA:80862802,80860101,00100000'
     Controls      : 21
     Simple ctrls  : 12
  Date: Thu Apr 15 15:08:59 2010
  HibernationDevice: RESUME=UUID=d4760b83-2892-4b31-bf01-cb6c7d267f1f
  InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20100226)
  MachineType: Acer Extensa 5630
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-20-generic root=/dev/sda7 i915.powersave=0 mmc_removable=0 thermal.psv=80 quiet splash
  ProcEnviron:
   LANG=en_US.utf8
   SHELL=/bin/bash
  RelatedPackageVersions: linux-firmware 1.33
  RfKill:
   0: acer-wireless: Wireless LAN
    Soft blocked: no
    Hard blocked: no
  SourcePackage: linux
  StagingDrivers: rt2860sta
  Title: [STAGING]
  dmi.bios.date: 12/05/2008
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: V1.25
  dmi.board.name: Homa
  dmi.board.vendor: Acer
  dmi.board.version: Rev
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvrV1.25:bd12/05/2008:svnAcer:pnExtensa5630:pvr0100:rvnAcer:rnHoma:rvrRev:cvnAcer:ct10:cvrN/A:
  dmi.product.name: Extensa 5630
  dmi.product.version: 0100
  dmi.sys.vendor: Acer

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