Public bug reported:
in 12.04, 3.2 or 3.5 kernel, when on battery power, throttling seems to
work as expected (cpu speed increases when needed). When on A/C
power/charging battery, cpu speed is stuck at the lowest. cpufreq-info
shows:
cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpuf...@vger.kernel.org, please.
analyzing CPU 0:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0 1 2 3
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 10.0 us.
hardware limits: 1.20 GHz - 2.60 GHz
available frequency steps: 2.60 GHz, 2.60 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz,
2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz,
1.40 GHz, 1.30 GHz, 1.20 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave,
performance
current policy: frequency should be within 1.20 GHz and 1.20 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1.20 GHz.
cpufreq stats: 2.60 GHz:6.83%, 2.60 GHz:0.19%, 2.50 GHz:0.13%, 2.40
GHz:0.16%, 2.30 GHz:0.13%, 2.20 GHz:0.10%, 2.10 GHz:0.11%, 2.00 GHz:0.10%, 1.90
GHz:0.13%, 1.80 GHz:0.20%, 1.70 GHz:0.29%, 1.60 GHz:0.13%, 1.50 GHz:0.14%, 1.40
GHz:0.10%, 1.30 GHz:0.04%, 1.20 GHz:91.22% (2874)
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0 1 2 3
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 10.0 us.
hardware limits: 1.20 GHz - 2.60 GHz
available frequency steps: 2.60 GHz, 2.60 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz,
2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz,
1.40 GHz, 1.30 GHz, 1.20 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave,
performance
current policy: frequency should be within 1.20 GHz and 1.20 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1.20 GHz.
cpufreq stats: 2.60 GHz:5.45%, 2.60 GHz:0.05%, 2.50 GHz:0.07%, 2.40
GHz:0.04%, 2.30 GHz:0.04%, 2.20 GHz:0.11%, 2.10 GHz:0.02%, 2.00 GHz:0.01%, 1.90
GHz:0.05%, 1.80 GHz:0.01%, 1.70 GHz:0.03%, 1.60 GHz:0.06%, 1.50 GHz:0.01%, 1.40
GHz:0.04%, 1.30 GHz:0.02%, 1.20 GHz:93.99% (1717)
analyzing CPU 2:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0 1 2 3
CPUs which need to have their frequency coordinated by software: 2
maximum transition latency: 10.0 us.
hardware limits: 1.20 GHz - 2.60 GHz
available frequency steps: 2.60 GHz, 2.60 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz,
2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz,
1.40 GHz, 1.30 GHz, 1.20 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave,
performance
current policy: frequency should be within 1.20 GHz and 1.20 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1.20 GHz.
cpufreq stats: 2.60 GHz:5.65%, 2.60 GHz:0.07%, 2.50 GHz:0.03%, 2.40
GHz:0.05%, 2.30 GHz:0.03%, 2.20 GHz:0.02%, 2.10 GHz:0.03%, 2.00 GHz:0.03%, 1.90
GHz:0.02%, 1.80 GHz:0.02%, 1.70 GHz:0.03%, 1.60 GHz:0.03%, 1.50 GHz:0.03%, 1.40
GHz:0.04%, 1.30 GHz:0.04%, 1.20 GHz:93.89% (1979)
analyzing CPU 3:
driver: acpi-cpufreq
CPUs which run at the same hardware frequency: 0 1 2 3
CPUs which need to have their frequency coordinated by software: 3
maximum transition latency: 10.0 us.
hardware limits: 1.20 GHz - 2.60 GHz
available frequency steps: 2.60 GHz, 2.60 GHz, 2.50 GHz, 2.40 GHz, 2.30 GHz,
2.20 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz,
1.40 GHz, 1.30 GHz, 1.20 GHz
available cpufreq governors: conservative, ondemand, userspace, powersave,
performance
current policy: frequency should be within 1.20 GHz and 1.20 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1.20 GHz.
cpufreq stats: 2.60 GHz:4.95%, 2.60 GHz:0.04%, 2.50 GHz:0.04%, 2.40
GHz:0.06%, 2.30 GHz:0.03%, 2.20 GHz:0.03%, 2.10 GHz:0.03%, 2.00 GHz:0.03%, 1.90
GHz:0.01%, 1.80 GHz:0.02%, 1.70 GHz:0.01%, 1.60 GHz:0.01%, 1.50 GHz:0.01%, 1.40
GHz:0.01%, 1.30 GHz:0.01%, 1.20 GHz:94.72% (1460)
I should also note, that this behavior only occurs when the system is
unplugged, allowed to run on battery power, then plugged back in. Once plugged
in, the ondemand profile locks it to 1.2GHz speed, as you can see by the above
policy.
"current policy: frequency should be within 1.20 GHz and 1.20 GHz."
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-generic-lts-quantal 3.5.0.25.32
ProcVersionSignature: Ubuntu 3.5.0-25.39~precise1-generic 3.5.7.4
Uname: Linux 3.5.0-25-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25.
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC269VC Analog [ALC269VC Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: phunyguy 2048 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xf2530000 irq 47'
Mixer name : 'Intel PantherPoint HDMI'
Components : 'HDA:10ec0269,17aa21fb,00100203
HDA:80862806,80860101,00100000'
Controls : 44
Simple ctrls : 16
Card29.Amixer.info:
Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw
unknown'
Mixer name : 'ThinkPad EC (unknown)'
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]
Date: Sat Mar 2 00:30:55 2013
HibernationDevice: RESUME=UUID=a7e06c70-d6cb-4138-ad11-f8cfd4f6908c
MachineType: LENOVO 2355G2U
MarkForUpload: True
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-25-generic
root=UUID=e6c26fd8-4d2a-4c91-87f0-8ece3954b1bb ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.5.0-25-generic N/A
linux-backports-modules-3.5.0-25-generic N/A
linux-firmware 1.79.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/24/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: G7ET29WW (1.11 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2355G2U
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:bvrG7ET29WW(1.11):bd05/24/2012:svnLENOVO:pn2355G2U:pvrThinkPadT430s:rvnLENOVO:rn2355G2U:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2355G2U
dmi.product.version: ThinkPad T430s
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug precise qa-kernel-lts-testing running-unity
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https://bugs.launchpad.net/bugs/1139331
Title:
cpu throttling not working
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