Public bug reported:
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 cpuf...@vger.kernel.org, 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.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Confirmed
** Tags: amd64 apport-bug raring staging
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https://bugs.launchpad.net/bugs/1174169
Title:
Minimum and maximum cpu frequency are equal
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