acpi_cpufreq detects Intel Core 2 Duo with incorrect frequency scaling from 600 to 800 MHz

Please attach a copy of "dmesg" too.

Cheers,
 Kyle

Hi Kyle,

here it is.

The motherboard is an Asus P5N32-E SLI

Hey i'm having the exact same problem. I running an E6400, on an ASUS P5N SLI

I'm attaching my dmesg.

Here is what /proc/cpuinfo

I figured out a work around for this bug which i have posted on the ubuntu forums:
http://ubuntuforums.org/showthread.php?p=2719839#post2719839

Step 1: Remove Userspace Scaling Software
Code:

sudo apt-get remove powernowd

Step 2: Restart
Acpi_cpufreq should no longer be loaded on startup and the processor(s) should be clocked at their full speed but without scaling support.

Step 3: Manually load your CPU module
I did
Code:

sudo modprobe acpi-cpufreq

Step 4: Load Scaling Modules

I was only interested in ondemand, but load the one(s) you need.

Code:

sudo modprobe cpufreq_ondemand

(others)

Code:

sudo modprobe cpufreq_conservative
sudo modprobe cpufreq_powersave
sudo modprobe cpufreq_stats
sudo modprobe cpufreq_userspace

Step 5: Testing/Configuration

Show Available Governors
Code:

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors

Select the governor you desire like so
Code:

sudo -s
echo ondemand > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

Step 6: Load Modules at Boot
Append your selected modules to the end of /etc/modules
Code:

[Step 3 module]
[Modules from Step 4]

Mine was
Code:

acpi-cpufreq
cpufreq_ondemand

Step 7: Configure Modules at Boot
This step needs to be done in order for the modules to retain your settings.
Make sure you have sysfsutils installed
Code:

sudo apt-get install sysfsutils

Then add the following lines to /etc/sysfs.conf
Code:

devices/system/cpu/cpu0/cpufreq/scaling_governor=ondemand
devices/system/cpu/cpu1/cpufreq/scaling_governor=ondemand

(If you have only one cpu then only the first line would apply)

Step 8: Reboot and enjoy
Hopefully everything should work now.

bug still exists in Gutsy

The Hardy Heron kernel was recently uploaded for testing. We'd really appreciate it if you could try testing with this newer kernel and verify if this issue still exists. Unfortunately, the Hardy Heron Alpha1 LiveCD was released with the older 2.6.22 kernel. You'll have to manually install the newer Hardy Heron kernel in order to test. This should not be the case for Alpha2 which is set to come out around Dec 20. However, here are the instructions to install if you choose to do so, otherwise just wait for Alpha2 to come out:

1) edit the file /etc/apt/sources.list and add the following line:

deb http://archive.ubuntu.com/ubuntu hardy main restricted

2) sudo apt-get update
3) sudo apt-get install linux-image-2.6.24-1-generic
4) reboot and select the new kernel from the grub menu

After you've tested, please feel free to revert back - ie boot into the old kernel, sudo apt-get remove linux-image-2.6.24-1-generic, and remove the line from /etc/apt/sources.list . Please update this report with your results. Thanks in advance!

I'm opened a new task against the actively developed kernel. However, I'm closing the report against linux-source-2.6.22 and linux-2.6.20 as it does not meet the criteria for a stable release update. You can learn more about the stable release update process at https://wiki.ubuntu.com/StableReleaseUpdates . Thanks!

it's working in hardy using linux-image-2.6.24-12-generic 2.6.24-12.20 (amd64)

Hi Marcel,

Thanks for testing and the update. I'm marking this "Fix Released" against Hardy. Thanks.

Not working in Intrepid. Attaching output of dmesg, contents of /proc/cpuinfo and everything in /sys/devices/system/cpu/cpu0/cpufreq/.

dazjorz@dazjorz-desktop:~$ uname -a
Linux dazjorz-desktop 2.6.27-9-generic #1 SMP Thu Nov 20 21:57:00 UTC 2008 i686 GNU/Linux
dazjorz@dazjorz-desktop:~$ cat /etc/issue
Ubuntu 8.10 \n \l

Let me know if you need anything else.

/proc/cpuinfo

dazjorz@dazjorz-desktop:~$ tail /sys/devices/system/cpu/cpu0/cpufreq/* >cpufreq
tail: cannot open `/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq' for reading: Permission denied
tail: error reading `/sys/devices/system/cpu/cpu0/cpufreq/ondemand': Is a directory
tail: error reading `/sys/devices/system/cpu/cpu0/cpufreq/stats': Is a directory

Also, the fix by Zekard did not work for me. I uninstalled powernowd, cpufrequtils and libcpufreq0, and the CPU still has its frequencies set too low, only now the frequency is always set to 800 MHz instead of switched between 600 and 800 MHz all the time.

I was trying to report this bug against linux-source-2.6.27, but this was impossible. I have filed a bug about that at
https://bugs.launchpad.net/launchpad/+bug/307668

Removing "Fix Released" status because the fix does not work.

On Tue, Dec 16, 2008 at 06:32:35PM -0000, dazjorz wrote:
> Removing "Fix Released" status because the fix does not work.
>
> ** Changed in: linux (Ubuntu)
> Status: Fix Released => New

Was this tested with the stock Inprepid kernel -security kernel
2.6.27-9 or with the -proposed kerenl 2.6.27-10 (from uname -r).
If it is not the -proposed kernel it would be worth enabling
proposed and installing and testing the kernel from there. Please see
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed. Thank you in advance!

I've added a Hardy nomination and marked it Fix Released to help indicate that @Marcel Schaal (the original bug reporter) had commented this was resolved for him with Hardy. However, @dazjorz has commented this is not fixed in Intrepid which is why the "linux" task will remain open. Thanks.

> Was this tested with the stock Inprepid kernel -security kernel
> 2.6.27-9 or with the -proposed kerenl 2.6.27-10 (from uname -r).
> If it is not the -proposed kernel it would be worth enabling
> proposed and installing and testing the kernel from there. Please see
> https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
> enable and use -proposed. Thank you in advance!

I don't see any -proposed or -security kernels, but I activated the Proposed repository and saw and installed kernel 2.6.27-10-generic. I will reboot soon and report the result. Thanks for the reply!

Nope, alas.

dazjorz@dazjorz-desktop:~$ uname -r
2.6.27-10-generic
dazjorz@dazjorz-desktop:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Duo CPU E6750 @ 2.66GHz
stepping : 11
cpu MHz : 800.000
[...snip...]
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 5333.20
clflush size : 64
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Duo CPU E6750 @ 2.66GHz
stepping : 11
cpu MHz : 800.000
[...snip...]
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 5333.24
clflush size : 64
power management:

Hi marcelschaal,

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? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you run the following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux-image-`uname -r` 106447

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

[This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

Still happens for me! Going to run the command as reported by kernel-janitor now.

Architecture: amd64
DistroRelease: Ubuntu 9.10
MachineType: System manufacturer System Product Name
NonfreeKernelModules: nvidia
Package: linux-image-2.6.30-10-generic 2.6.30-10.12
PackageArchitecture: amd64
ProcCmdLine: root=UUID=ddc4c356-d316-4d56-9f23-025f6c28bc3e ro quiet splash
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/zsh
ProcVersionSignature: Ubuntu 2.6.30-10.12-generic
RelatedPackageVersions: linux-backports-modules-2.6.30-10-generic N/A
Uname: Linux 2.6.30-10-generic x86_64
UserGroups: adm admin cdrom dialout disk lpadmin plugdev pulse-rt sambashare vboxusers
dmi.bios.date: 08/22/2007
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS P5N32-E SLI ACPI BIOS Revision 1205
dmi.board.name: P5N32-E SLI
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: 1.XX
dmi.chassis.asset.tag: 123456789000
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrASUSP5N32-ESLIACPIBIOSRevision1205:bd08/22/2007:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5N32-ESLI:rvr1.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

Architecture: amd64
DistroRelease: Ubuntu 9.04
HibernationDevice: RESUME=UUID=445a786f-4b02-4b31-be79-4b46dc2e64e0
MachineType: System manufacturer P5K
NonfreeKernelModules: fglrx
Package: linux-image-2.6.28-13-generic 2.6.28-13.45 [modified: lib/modules/2.6.28-13-generic/kernel/sound/drivers/mpu401/snd-mpu401-uart.ko lib/modules/2.6.28-13-generic/kernel/sound/drivers/mpu401/snd-mpu401.ko lib/modules/2.6.28-13-generic/kernel/sound/drivers/opl3/snd-opl3-lib.ko lib/modules/2.6.28-13-generic/kernel/sound/drivers/opl3/snd-opl3-synth.ko lib/modules/2.6.28-13-generic/kernel/sound/drivers/pcsp/snd-pcsp.ko lib/modules/2.6.28-13-generic/kernel/sound/drivers/snd-dummy.ko lib/modules/2.6.28-13-generic/kernel/sound/drivers/snd-mtpav.ko lib/modules/2.6.28-13-generic/kernel/sound/drivers/snd-mts64.ko lib/modules/2.6.28-13-generic/kernel/sound/drivers/snd-portman2x4.ko lib/modules/2.6.28-13-generic/kernel/sound/drivers/snd-serial-u16550.ko lib/modules/2.6.28-13-generic/kernel/sound/drivers/snd-virmidi.ko lib/modules/2.6.28-13-generic/kernel/sound/drivers/vx/snd-vx-lib.ko lib/modules/2.6.28-13-generic/kernel/sound/i2c/other/snd-ak4114.ko lib/modules/2.6.28-13-generic/kernel/sound/i2c/other/snd-ak4117.ko lib/modules/2.6.28-13-generic/kernel/sound/i2c/other/snd-ak4xxx-adda.ko lib/modules/2.6.28-13-generic/kernel/sound/i2c/other/snd-pt2258.ko lib/modules/2.6.28-13-generic/kernel/sound/i2c/other/snd-tea575x-tuner.ko lib/modules/2.6.28-13-generic/kernel/sound/i2c/snd-cs8427.ko lib/modules/2.6.28-13-generic/kernel/sound/i2c/snd-i2c.ko lib/modules/2.6.28-13-generic/kernel/sound/isa/sb/snd-sb-common.ko lib/modules/2.6.28-13-generic/kernel/sound/isa/sb/snd-sb16-dsp.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/ac97/snd-ac97-codec.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/ali5451/snd-ali5451.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/au88x0/snd-au8810.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/au88x0/snd-au8820.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/au88x0/snd-au8830.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/aw2/snd-aw2.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/ca0106/snd-ca0106.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/cs46xx/snd-cs46xx.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-darla20.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-darla24.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-echo3g.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-gina20.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-gina24.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-indigo.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-indigodj.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-indigoio.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-layla20.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-layla24.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-mia.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/echoaudio/snd-mona.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/emu10k1/snd-emu10k1-synth.ko lib/modules/2.6.28-13-generic/kernel/sound/pci/emu10k1/...

Architecture: i386
DistroRelease: Ubuntu 9.04
HibernationDevice: RESUME=UUID=fa74826a-d005-428c-bc5d-cf9b983042bc
MachineType: Clevo Co. M570RU
NonfreeKernelModules: nvidia
Package: linux-image-2.6.28-14-generic 2.6.28-14.47
PackageArchitecture: i386
ProcCmdLine: root=UUID=d932e35f-b774-4937-93f6-273e4587f706 ro quiet splash
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.28-14.47-generic
Uname: Linux 2.6.28-14-generic i686
UserGroups: adm admin avahi-autoipd cdrom dialout haldaemon lpadmin plugdev pulse pulse-access pulse-rt sambashare

Architecture: i386
DistroRelease: Ubuntu 9.04
HibernationDevice: RESUME=UUID=fa74826a-d005-428c-bc5d-cf9b983042bc
MachineType: Clevo Co. M570RU
NonfreeKernelModules: nvidia
Package: linux-image-2.6.28-14-generic 2.6.28-14.47
PackageArchitecture: i386
ProcCmdLine: root=UUID=d932e35f-b774-4937-93f6-273e4587f706 ro quiet splash
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.28-14.47-generic
Uname: Linux 2.6.28-14-generic i686
UserGroups: adm admin avahi-autoipd cdrom dialout haldaemon lpadmin plugdev pulse pulse-access pulse-rt sambashare

Architecture: i386
DistroRelease: Ubuntu 9.04
HibernationDevice: RESUME=UUID=fa74826a-d005-428c-bc5d-cf9b983042bc
MachineType: Clevo Co. M570RU
NonfreeKernelModules: nvidia
Package: linux-image-2.6.28-14-generic 2.6.28-14.47
PackageArchitecture: i386
ProcCmdLine: root=UUID=d932e35f-b774-4937-93f6-273e4587f706 ro quiet splash
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.28-14.47-generic
Uname: Linux 2.6.28-14-generic i686
UserGroups: adm admin avahi-autoipd cdrom dialout haldaemon lpadmin plugdev pulse pulse-access pulse-rt sambashare

I'm not sure what's going on here. I was in this thread : https://bugs.launchpad.net/ubuntu/+source/linux/+bug/107232

kernel-janitor wrote on 2009-06-26: to run this command: apport-collect -p linux-image-`uname -r` 106447

Now I find it located here.

This was originally about poor sound/volume issues many users are having with Ubuntu.

Architecture: i386
DistroRelease: Ubuntu 9.04
HibernationDevice: RESUME=UUID=fa74826a-d005-428c-bc5d-cf9b983042bc
MachineType: Clevo Co. M570RU
NonfreeKernelModules: nvidia
Package: linux-image-2.6.28-15-generic 2.6.28-15.49
PackageArchitecture: i386
ProcCmdLine: root=UUID=d932e35f-b774-4937-93f6-273e4587f706 ro quiet splash
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
ProcVersionSignature: Ubuntu 2.6.28-15.49-generic
Uname: Linux 2.6.28-15-generic i686
UserGroups: adm admin avahi-autoipd cdrom dialout haldaemon lpadmin plugdev pulse pulse-access pulse-rt sambashare

Still happens for me with 2.6.31-10. Kernel-janitor (probably a bot) asked for information and got it, five times. This ought to be enough to investigate the problem. Is someone working on this? I see the tag needs-upstream-testing, has this actually been requested upstream? Is the maintainer doing anything about this bug, what's the status? Please let me know.

Thanks.

@Sjors Gielen
  Kernel-janitor is a bot. Could you test karmic and/or mainline build (http://kernel.ubuntu.com/~kernel-ppa/mainline/) to see whether the issue still exist. If so, it will be helpful to attach the file /proc/acpi/dsdt for debugging.

I tested the newest kernel in Karmic today (2.6.31-16-generic). The bug still exists there. My /proc/cpuinfo and /proc/acpi/dsdt are attached in a tgz archive, feel free to request any other bit of information that could help. Thanks to anyone who looks into this... :)

This bug was filed against a series that is no longer supported and so is being marked as Won't Fix. If this issue still exists in a supported series, please file a new bug.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.