kernel-packages team mailing list archive

[David Dchtoo <david@xxxxxxxxxxxxxxxxx>]

For anyone that might have this problem: I finally noticed what was lagging my PC, probably for ages. Duh.
This solved it - either the kernel boot parameter to disable the BIOS imposed limit as above, or what is noted down here:

http://blog.patshead.com/2013/04/my-bios-is-limiting-my-cpu-clock-
speed.html

(as root)
echo 1 > /sys/module/processor/parameters/ignore_ppc
(this will not persist)

It's on a Lenovo X220. My battery's in a poor shape + my charger cable
is (poorly) DIY fixed, which are probably connected.

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https://bugs.launchpad.net/bugs/1174169

Title:
  Minimum and maximum cpu frequency are equal

Status in linux package in Ubuntu:
  Invalid

Bug description:
  I just noticed my laptop stared working considerably slower. I am
  using an updated 13.04, though the issue did not start right after the
  upgrade. After tracking down the issue I noticed that both processors
  operate at 800 MHz instead of the maximum 1800 MHz. Irrespective of
  the load, the frequency remains 800. Here are some stats:

  
      $ cpufreq-info 
      cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
      Report errors and bugs to cpufreq@xxxxxxxxxxxxxxx, please.
      analyzing CPU 0:
        driver: powernow-k8
        CPUs which run at the same hardware frequency: 0 1
        CPUs which need to have their frequency coordinated by software: 0 1
        maximum transition latency: 109 us.
        hardware limits: 800 MHz - 1.80 GHz
        available frequency steps: 1.80 GHz, 1.60 GHz, 800 MHz
        available cpufreq governors: conservative, ondemand, userspace, powersave, performance
        current policy: frequency should be within 800 MHz and 800 MHz.
                        The governor "performance" may decide which speed to use
                        within this range.
        current CPU frequency is 800 MHz.
        cpufreq stats: 1.80 GHz:0.00%, 1.60 GHz:0.00%, 800 MHz:100.00%
      analyzing CPU 1:
        driver: powernow-k8
        CPUs which run at the same hardware frequency: 0 1
        CPUs which need to have their frequency coordinated by software: 0 1
        maximum transition latency: 109 us.
        hardware limits: 800 MHz - 1.80 GHz
        available frequency steps: 1.80 GHz, 1.60 GHz, 800 MHz
        available cpufreq governors: conservative, ondemand, userspace, powersave, performance
        current policy: frequency should be within 800 MHz and 800 MHz.
                        The governor "performance" may decide which speed to use
                        within this range.
        current CPU frequency is 800 MHz.
        cpufreq stats: 1.80 GHz:0.00%, 1.60 GHz:0.00%, 800 MHz:100.00%

  Note the "current policy" says the frequency is between 800 and 800
  irrespective of the hardware limits. The original governor was
  "ondemand", so I changed it to "performance" in order to see if that
  makes a difference which it didn't. No amount of invoking cpufreq-set
  or cpufreq-selector changes the frequency.

  Looking around, I noticed several people reported similar issues in
  the past though no favorable answer exists. Any help would be greatly
  appreciated.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: linux-image-3.8.0-19-generic 3.8.0-19.29
  ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
  Uname: Linux 3.8.0-19-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  nasko      2398 F.... pulseaudio
  CurrentDmesg:
   [   39.683389] vboxdrv: fAsync=1 offMin=0x10104a4 offMax=0x10104a4
   [   39.683848] vboxdrv: TSC mode is 'asynchronous', kernel timer mode is 'normal'.
   [   39.683860] vboxdrv: Successfully loaded version 4.2.10_Ubuntu (interface 0x001a0004).
   [   39.985701] vboxpci: IOMMU not found (not registered)
   [   42.446439] init: plymouth-stop pre-start process (1891) terminated with status 1
  Date: Mon Apr 29 01:45:06 2013
  HibernationDevice: RESUME=UUID=f31bb83c-fcb0-4ec5-81cc-40fee0d3d80f
  InstallationDate: Installed on 2012-11-13 (166 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: Dell Inc. Inspiron 1721
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 radeondrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=f649c2c6-c308-4d41-a92c-f75a3aac68de ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-19-generic N/A
   linux-backports-modules-3.8.0-19-generic  N/A
   linux-firmware                            1.106
  SourcePackage: linux
  StagingDrivers: zram
  UpgradeStatus: Upgraded to raring on 2013-04-26 (3 days ago)
  dmi.bios.date: 05/16/2007
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A00
  dmi.board.name: 0RT951
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA00:bd05/16/2007:svnDellInc.:pnInspiron1721:pvr:rvnDellInc.:rn0RT951:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: Inspiron 1721
  dmi.sys.vendor: Dell Inc.

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