Arch Linux

milaan

Member

Registered: 2009-07-28

Posts: 7

[SOLVED] acpi_cpufreq: highest frequency unreachable

Hi,

I have a wired problem with cpu frequency scalling. My proc is an Intel e2200 dual core, @2.20 GHz.
Whatever governor I choose, the frequency is always 1.60 GHz or 1.20 Ghz. Even if I choose "Performance", the frequency stays at 1.60 GHz, though it should be 2.20 GHz.

Here is the output of cpufreq-info

cpufrequtils 005: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which need to switch frequency at the same time: 0
  hardware limits: 1.20 GHz - 2.20 GHz
  available frequency steps: 2.20 GHz, 1.60 GHz, 1.20 GHz
  available cpufreq governors: userspace, conservative, powersave, ondemand, performance
  current policy: frequency should be within 1.20 GHz and 2.20 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 1.60 GHz.
analyzing CPU 1:
  driver: acpi-cpufreq
  CPUs which need to switch frequency at the same time: 1
  hardware limits: 1.20 GHz - 2.20 GHz
  available frequency steps: 2.20 GHz, 1.60 GHz, 1.20 GHz
  available cpufreq governors: userspace, conservative, powersave, ondemand, performance
  current policy: frequency should be within 1.20 GHz and 2.20 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 1.60 GHz.

Thank you for your help!

Last edited by milaan (2009-07-29 22:14:28)

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Currently using Arch64 + Gnome and kernel 2.6.30

R00KIE

Forum Fellow

From: Between a computer and a chair

Registered: 2008-09-14

Posts: 4,734

Re: [SOLVED] acpi_cpufreq: highest frequency unreachable

What's inside your /etc/conf.d/cpufreq ?

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R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K

milaan

Member

Registered: 2009-07-28

Posts: 7

Re: [SOLVED] acpi_cpufreq: highest frequency unreachable

Hi ROOKIE,
Here is the file:

#configuration for cpufreq control

# valid governors:
#  ondemand, performance, powersave,
#  conservative, userspace
governor="conservative"

# valid suffixes: Hz, kHz (default), MHz, GHz, THz
min_freq="1.20GHz"
max_freq="2.20GHz"

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Currently using Arch64 + Gnome and kernel 2.6.30

R00KIE

Forum Fellow

From: Between a computer and a chair

Registered: 2008-09-14

Posts: 4,734

Re: [SOLVED] acpi_cpufreq: highest frequency unreachable

Seems ok but try to comment the minimum and maximum frequencies and restart the daemon. It should work without the need to tell it explicitly the minimum and maximum frequencies.

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R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K

milaan

Member

Registered: 2009-07-28

Posts: 7

Re: [SOLVED] acpi_cpufreq: highest frequency unreachable

I have commented as you said and restarted the deamon

$ sudo /etc/rc.d/cpufreq restart
:: Setting cpufreq governing rules , cpu 0 1                             [DONE]

But he frequency won't reach the 2.20GHz...

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Currently using Arch64 + Gnome and kernel 2.6.30

R00KIE

Forum Fellow

From: Between a computer and a chair

Registered: 2008-09-14

Posts: 4,734

Re: [SOLVED] acpi_cpufreq: highest frequency unreachable

No other ideas here except for trying with a live cd of other distro or Arch's boot image and check if it works (cat /proc/cpuinfo will also tell you the current speed if you don't want to install cpufrequtils).

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R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K

milaan

Member

Registered: 2009-07-28

Posts: 7

Re: [SOLVED] acpi_cpufreq: highest frequency unreachable

It used to work with ubuntu...
Thank you for your help anyway!

EDIT TO ADD: I have enabled "ACPI 2.0 support" in the BIOS, and now it works! But that ACPI option might have nothing to do with the matter, I don't know, it could be just the added comments + the reboot...

Last edited by milaan (2009-07-29 22:11:55)

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Currently using Arch64 + Gnome and kernel 2.6.30

arlite

Member

From: .de

Registered: 2008-05-02

Posts: 31

Re: [SOLVED] acpi_cpufreq: highest frequency unreachable

Maybe Ubuntu is not the best solution if you are used to use Arch.

I have had same issue here: Intel E6750 (2.67 GHz, 2.34 GHz, 2.00 GHz) didn't reach 2.67GHz, only 2.34GHz

After trying several configs it is working now with these settings:
rc.conf:
MODULES=( ... acpi-cpufreq cpufreq-ondemand cpufreq-stats ... )

/etc/conf.d/cpufreq

#configuration for cpufreq control

# valid governors:
#  ondemand, performance, powersave,
#  conservative, userspace
governor="ondemand"
##governor="powersave"

# valid suffixes: Hz, kHz (default), MHz, GHz, THz
min_freq="2.00GHz"
max_freq="2.67GHz"

Now my processor reaches 2.6GHz under load.

milaan

Member

Registered: 2009-07-28

Posts: 7

Re: [SOLVED] acpi_cpufreq: highest frequency unreachable

Thank you arlite,
I have edited my last post. And don't worry, I think I'll stay on Archlinux, even if I still think ubuntu is a good distrib 

Last edited by milaan (2009-07-29 22:20:17)

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Currently using Arch64 + Gnome and kernel 2.6.30