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Hi, I recently put Arch on my Dell Inspiron 8600, and I was wondering if anyone had come across or writen any guides to getting the cpu frequency scaling to work reliably. I am not concerned with acpi, but on getting my computer to scale back to 600 mhz from 1.5 ghz when I switch to batter power.
Thanks for your help.
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it's not really all that difficult - make sure you use the right scaling module (p4_clockmod works for me... it might work for you too)... then you can grab something like cpudyn or cpufreqd and just configure that as per the man pages... I use cpudyn myself
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Or you just modprobe governor_ondemand and echo ondemand to /sys/devices/system/cpu/cpu0/scaling_governor. It's a much easier and cleaner way to get dynamic scaling working imo.
I don't have my laptop with me, so I am not sure about the module name and pathname.
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I use cpufreqd to automatically scale for me.
On the Arch kernel you have to modprobe a module, but im not sure what module it is -- i compile everything in.
Theres a special one for centrino/pentiumm based computers. i *think * it's speedstep-centrino
iphitus
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i *think * it's speedstep-centrino
yeah, that's it
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Or you just modprobe governor_ondemand and echo ondemand to /sys/devices/system/cpu/cpu0/scaling_governor. It's a much easier and cleaner way to get dynamic scaling working imo.
I don't have my laptop with me, so I am not sure about the module name and pathname.
I second this; no need for deamons doing the stepping for you this way. It works like a charm.
I use ondemand when it's on AC and powersave when it switches to battery.
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you can also use powernowd (which is a daemon that doesn't need any configs and is very lightweight)
it is in the aur
http://www.linuxportalen.com -> Linux Help portal for Linux and ArchLinux (in swedish)
Dell Inspiron 8500
Kernel 2.6.14-archck1 (selfcompiled)
Enlightenment 17
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I have an Inspiron 8600 too.
You need to :
modprobe speedstep_centrino (with a _ and not a - )
I've tried powernowd,cpufreqd,cpudyn and they all work nicely.
To see if it works, don't look at /proc/cpuinfo, but at /sys/blahblah/cpu/cpufreq or something like that.
If you need further information about how to make your laptop model work, just ask.
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