kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Anton Piatek, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested. For example:
kernel-fixed-upstream-v3.12

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:
needs-upstream-testing

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

As well, please remove the tag:
needs-upstream-testing

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.

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

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https://bugs.launchpad.net/bugs/962947

Title:
  CPU scaled back to very slow speed, cannot increase speed

Status in The Linux Kernel:
  Incomplete
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  It appears that my 1.86GHz  Intel Core2 CPU is only running at 700Mhz.
  The attached files show (in /proc/cpu) that the cpu is actually a
  1.86Ghz, but cpufreq only lets me set a maximum of 700mhz. I am
  running precise amd64 on a 3.2.0-20-generic kernel, though the same
  was seen linux-image-3.2.0-19-generic as well I believe.

  The system is a Lenovo ThinkCentre 8810-91G, and the bios is the
  latest one available. The bios doesn't show any cpu limiting options
  or restrictions, and shows the cpus as the expected 1.86Mhz (though I
  think that is just model information rather than the current clock
  speed). I cannot see any overclocking options in the bios.

  $cpufreq-info 
  cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
  Report errors and bugs to cpufreq@xxxxxxxxxxxxxxx, please.
  analyzing CPU 0:
    driver: acpi-cpufreq
    CPUs which run at the same hardware frequency: 0 1
    CPUs which need to have their frequency coordinated by software: 0
    maximum transition latency: 10.0 us.
    hardware limits: 600 MHz - 700 MHz
    available frequency steps: 700 MHz, 600 MHz
    available cpufreq governors: conservative, ondemand, userspace, powersave, performance
    current policy: frequency should be within 600 MHz and 700 MHz.
                    The governor "ondemand" may decide which speed to use
                    within this range.
    current CPU frequency is 600 MHz.
    cpufreq stats: 700 MHz:69.61%, 600 MHz:30.39%  (3179)
  analyzing CPU 1:
    driver: acpi-cpufreq
    CPUs which run at the same hardware frequency: 0 1
    CPUs which need to have their frequency coordinated by software: 1
    maximum transition latency: 10.0 us.
    hardware limits: 600 MHz - 700 MHz
    available frequency steps: 700 MHz, 600 MHz
    available cpufreq governors: conservative, ondemand, userspace, powersave, performance
    current policy: frequency should be within 600 MHz and 700 MHz.
                    The governor "ondemand" may decide which speed to use
                    within this range.
    current CPU frequency is 700 MHz.
    cpufreq stats: 700 MHz:59.66%, 600 MHz:40.34%  (4168)

  ACPI appears to be reporting a bios limit on the CPU, though I have no
  idea why.

  $for i in /sys/devices/system/cpu/cpu0/cpufreq/*; do echo $i; sudo cat $i ; done
  /sys/devices/system/cpu/cpu0/cpufreq/affected_cpus
  0
  /sys/devices/system/cpu/cpu0/cpufreq/bios_limit
  700000
  /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
  700000
  /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
  700000
  /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq
  600000
  /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_transition_latency
  10000
  /sys/devices/system/cpu/cpu0/cpufreq/related_cpus
  0 1
  /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
  700000 600000 
  /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
  conservative ondemand userspace powersave performance 
  /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
  700000
  /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver
  acpi-cpufreq
  /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
  ondemand
  /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
  700000
  /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
  600000
  /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
  <unsupported>

  I can't recall if this was an issue on oneiric or not as I never
  looked at the cpufreq before. It may or may not be a new issue.

  I'm not entirely sure if this is a kernel bug or something else (like
  ACPI), but am happy to try various other kernels to see if they help.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-20-generic 3.2.0-20.32
  ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12
  Uname: Linux 3.2.0-20-generic x86_64
  NonfreeKernelModules: nvidia
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.95-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  anton      4977 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Date: Fri Mar 23 09:59:01 2012
  HibernationDevice: RESUME=/dev/mapper/vg0-swap
  InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Alpha amd64 (20100701)
  MachineType: LENOVO 881091G
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-20-generic root=/dev/mapper/vg0-ubuntu ro quiet splash vt.handoff=7
  RfKill:
   
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/12/2008
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 2JKT49AUS
  dmi.board.name: LENOVO
  dmi.board.vendor: LENOVO
  dmi.board.version: NONE
  dmi.chassis.asset.tag: �������������������������
  dmi.chassis.type: 3
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: NONE
  dmi.modalias: dmi:bvnLENOVO:bvr2JKT49AUS:bd12/12/2008:svnLENOVO:pn881091G:pvrThinkCentreM55:rvnLENOVO:rnLENOVO:rvrNONE:cvnLENOVO:ct3:cvrNONE:
  dmi.product.name: 881091G
  dmi.product.version: ThinkCentre M55
  dmi.sys.vendor: LENOVO

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