[SOLVED] cpufreq: eeepc 701: no auto scaling

Question

I did:
# pacman -S cpufreq acpid
# modprobe p4-clockmod
# modprobe cpufreq-ondemand
Also put p4-clockmod, cpufreq-ondemand, and cpufreq-conservative into MODULES section of /etc/rc.fonf
and included acpid and cpufreq to the DAEMONS array (to see if automatically loading these settings make a difference).
I've got "ondemand" in the /etc/conf.d/cpufreq (but have tried "powersave" and "conservative" as well - the settings do have effect).
cpufreq-info
returns:
-- snip --
driver: p4-clockmod
-- snip --
current policy: frequency should be within 113 MHz and 900 MHz
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 900 MHz (asserted by call to hardware).
Note please, that it says "performance, not "ondemand".
I get the same when I do:
# cpufreq-set -c 0 -g ondemand
Only if do
# cpufreq-set -c 0 -g powersave
I get this reply from cpufreq-info:
-- snip --
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 113 MHz (asserted by call to hardware).
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
returns:
userspace conservative ondemand performance
# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
gives
112500 225000 450000 562500 675000 787500 900000
I can change frequencies manually with (eg.):
# cpufreq-set -c 0 -f 112500
, but both ondemand and conservative keep the clock at 900 MHz, whereas powersave keeps everything at 112.5 MHz, no matter what the load is.
I haven't tried to fiddle around with up_threshold and down_threshold settings yet, as I would expect to see cpufreq to scale down at least a little bit on basically 0 load.
Am I missing some critical setting? cpufreq seems to be working, since I can change things manually.
My google-magic has deserted me on this one. Any ideas?
Last edited by JackH79 (2012-06-20 22:56:01)

Answer 1

Gusar wrote:He is wrong about the performance governor though, it's not built into the kernel, so you do need to load it (unless the p4-clockmod module loads it automatically, I'd have to check that).
hm, performance is available on my system without loading the module, and as far as I know (with my addmittedly limited kernel config knowledge) =y means built into the kernel!?
$ zgrep CONFIG_CPU_FREQ_GOV_PERFORMANCE /proc/config.gz
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y