Arch Linux

Gullible Jones

Member

Registered: 2004-12-29

Posts: 4,863

Cannot modprobe acpi

[root@localhost proteus]# modprobe acpi
FATAL: Error inserting acpi_cpufreq (/lib/modules/2.6.12-mm2-ARCH/kernel/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.ko): No such device

Uhhh... WTF? I wasn't aware that ACPI *required* CPU frequency adjust... My BIOS should support ACPI...

dtw

Forum Fellow

From: UK

Registered: 2004-08-03

Posts: 4,439

Website

Re: Cannot modprobe acpi

i386 - that don't look right!

T-Dawg

Forum Fellow

From: Charlotte, NC

Registered: 2005-01-29

Posts: 2,736

Re: Cannot modprobe acpi

acpi is built into the kernel not as a module, besides I thought you're supposed to install/run acpid in DAEMONS() anyways?

Gullible Jones

Member

Registered: 2004-12-29

Posts: 4,863

Re: Cannot modprobe acpi

Yep, tried that... Power saving options don't seem to work though. :?

Maybe I should check my BIOS... I might have disabled them or something...

phrakture

Arch Overlord

From: behind you

Registered: 2003-10-29

Posts: 7,879

Website

Re: Cannot modprobe acpi

for cpu freq changes, I have to modprobe "p4_clockmod" - it depends on your processor...

ACPI itself doesn't give you any power savings - it just gives you events to respond to.... the acpi interface will give you "psst someone close the lid" or "hey, AC adapter is unplugged" but not "hey I'm going to use less battry power"

personally, I use cpudyn and laptop-mode-tools for "power savings"

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Gullible Jones

Member

Registered: 2004-12-29

Posts: 4,863

Re: Cannot modprobe acpi

Okay... Got CPU frequency scaling working properly! Thanks!

tmadhavan

Member

From: Wales :D

Registered: 2004-03-26

Posts: 441

Re: Cannot modprobe acpi

Ummmm... what did you do then? I have the same problem not being able to modprobe the powernow-k7 module.

phrakture

Arch Overlord

From: behind you

Registered: 2003-10-29

Posts: 7,879

Website

Re: Cannot modprobe acpi

Ummmm... what did you do then? I have the same problem not being able to modprobe the powernow-k7 module.

what processor do you have?

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Gullible Jones

Member

Registered: 2004-12-29

Posts: 4,863

Re: Cannot modprobe acpi

I did as phrakture said - I used p4_clockmod. (I have a Celeron D.)

kozaki

Member

From: London >. < Paris

Registered: 2005-06-13

Posts: 671

Website

Re: Cannot modprobe acpi

Also trying to controle CPU step on a Dell Latitude L400 with a P3 (697,071MHz with speedstep), kernel-2.6.15-ARCH. No luck yet

I first had a look at /sys/devices/system/cpu/cpu0/ where there are no 'cpufreq/' (only 'online') source

Then '# modprobe cpufreq_userspace', '# /etc/rc.d/acpid start'  & wanted to start powernowd, but it won't start

modprobe 'p3_clockmod' --> "not found" (BTW 'p4_clockmod' --> "Error inserting p4... (/lib/modules/.../arch/i336/kernel/..." ?)

'# /etc/rc/d/cpudyn start' and the CPU frequence stays @ 697,071MHz.

Then I went to the BIOS where I set (forgive the approximations in some terms) CPU-blabla to "Battery Optimized" "Authorize external applications to control blabla". Now the CPU stays glued to 497,923MHz even if I'm currently running on AC Power :?:

Note than /proc/acpi/processor/CPU0/throttling says :

state count :   8
active state: T0
states:
  *T0:  00%
   T1:  012%
   T2:  025%
   ...
   T7:  087%

I'm just a bit lost in this location

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