[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...
acpi is built into the kernel not as a module, besides I thought you're supposed to install/run acpid in DAEMONS() anyways?
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...
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"
Okay... Got CPU frequency scaling working properly! Thanks!
Ummmm... what did you do then? I have the same problem not being able to modprobe the powernow-k7 module.
I did as phrakture said - I used p4_clockmod. (I have a Celeron D.)
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
I'm just a bit lost in this location
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