ACPI frequency processor is not possible

Are you sure you're running an ubuntu kernel? because 2.6.18-1.2798.fc6 doesn't seems to be one. What says the output of
uname -a ?

This is my "uname -a"

Linux huh-desktop 2.6.20-15-generic #2 SMP Sun Apr 15 07:36:31 UTC 2007 i686 GNU/Linux

sorry , the error code above is wrong. I search in google end

Here is my "good" error ...

FATAL: Error inserting acpi_cpufreq
(/lib/modules/2.6.20-15-generic/kernel/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.ko);
No such device

The problem is :

In WinXp on my notebook Acer TravelMate is something like Power Control (few steps energy control) but on Ubuntu 7.04 no is possible to change cpu frequency.
I don't know why. On Edgy Eft this problem not exist.

I'm sorry for my english.

Could you try to modprobe other modules located in /lib/modules/2.6.20-15-generic/kernel/arch/i386/kernel/cpu/cpufreq/ ?

Here is my solutions:

sudo modprobe p4-clockmod

on dmesg I see:

[ 143.376000] p4-clockmod: P4/Xeon(TM) CPU On-Demand Clock Modulation available

sudo dpkg-reconfigure gnome-applets // and say Yes to set SUID

cat /proc/cpuinfo

processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 13
model name : Intel(R) Celeron(R) M processor 1.50GHz
stepping : 8
cpu MHz : 187.500
cache size : 1024 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx up
bogomips : 2996.25
clflush size : 64

It is possible scalling frequncy 187,5Mhz - 1500MHz

:)

but still not detect correctly automatically on Feisty. only manual changes.

Could you help me , how I can add this module for autodetect on my laptop (not for modprobe manualy in rc.local but autodetect)

p4-clockmod seems to have been disabled on purpose. (see /usr/share/powernowd/cpufreq-detect.sh)

As a workaround you can try
echo "FREQDRIVER=p4-clockmod" >/etc/default/powernowd

Thank you, works perfectly... I don't know why this is disabled... all works perfectly for me.
But all time I think why acpi show up the info :

ACPI Exception (acpi_processor-0677): AE_NOT_FOUND, Processor Device is not present [20060707]

Do you know why?

Thanks.

@Laurent i have a second question.

In this moment I have powernawd closed and all works fine.
CPU freq scaling works good. only module p4-clockmod i running.

Hm. How this works? I thought that this run on Powernowd, but I was wrong.
Daemon powernowd not run and freq scaling works. hm ....

ACPI say that my processor is "not present" :) that is strange ( present in sense "present-day" ? or "missing" ? I don't know)

What control my cpu freq scalling ? kernel? If that the problem is not actually in subject, only the problem is module p4-clockmod
What load this and others modules for scaling freq ?

Why not is detected automatically ?

The powernowd package is obsolete, please do not use it. CPU frequency scaling is now handled by the kernel, so if you still have issues on a modern release, file a bug against the linux package.

This is not an appropriate way to declare a package "obsolete". If you think a package should not be used, file a bug to get it removed from the archive and *then* invalidate the bugs.

This package is obsolete and has been removed from the archive. Closing associated bugs.