[MOD] Disable perflock for stock kernel (2.03.405.3)

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Here I put together perflock_disable update package for Legend stock kernel 2.6.29-5f084974. It is ment to disable perflock on every boot. This package consists of perflock_disable module (now licensed under GPL) from SetCPU app and boot script that loads this module.

Background:

Stock Legend's kernel has performance lock turned on. This means that (unless you recompiled your own kernel) CPU frequency scaling is somehow limited. Default limits are set from 480 to 600 MHz while screen is on and to 246 MHz while screen is off. Furthermore ondemand CPU scaling governor is limited from 246 to 600 MHz. This means you can not underclock you Legend with SetCPU unless you use perflock disable option which you have to set manually after every reboot. And here this "update" kicks in.

Requirements:

• rooted Legend of course
• kernel 2.6.29-5f084974
• busybox
• run-parts integrated in init.rc script (/etc/init.d)

Big thanks goes to coolbho3000 who now offers this module under GPL so we can use it outside his cool app.

Good post Blayo, wish it had come along earlier.

I hope more kernels will be coming along.

Sorry... how to install this ?

from ROM Manager ?

Originally Posted by Learners Lisence

Good post Blayo, wish it had come along earlier.

I hope more kernels will be coming along.

Well this is for stock kernel. If you have your own kernel, you could have disabled perflok while you were compiling it and you wouldn't needed this module...

Originally Posted by Vuska

Sorry... how to install this ?

from ROM Manager ?

Install it as any other update.zip via recovery mode. But you need run-parts in your init.rc, otherwise the module won't load.

I also compiled cpufreq governor modules (conservative and powersave) for stock kernel if anyone is interested...

But you need run-parts in your init.rc, otherwise the module won't load.

How to do this ?

This is beyond the scope of this tread. You can try Chef Central but to be honest, if you don't know what this is or how it is done, then this (Android Development) is perhaps not the right forum for you.

Originally Posted by BlaY0

Well this is for stock kernel. If you have your own kernel, you could have disabled perflok while you were compiling it and you wouldn't needed this module...

Yes, Blayo. I flashed the 806 kernel by dumfuq a week back. Im quite happy with it so far but would like to experiment with more Legend compatible kernels.
I read around a bit and then decided that underclocking and battery save could be achieved by a overclock kernel designed for 'performance' ....kinda like 'having the cake and eating it too"

Nevertheless, I appreciate the ideas associated with your present and possible future shares.
Thanks

Originally Posted by Learners Lisence

I read around a bit and then decided that underclocking and battery save could be achieved by a overclock kernel designed for 'performance' ....kinda like 'having the cake and eating it too"

Yes of course. Those custom kernels don't have enabled perflock so you can set speed by using SetCPU without loading perflock_disable module.

Well, if I'm frank I have never been fond of overclocking. My goal is just to extend the battery life of these "hungry" devices as much as possible without affecting user experience.

Right now I'm testing conservative governor and have some problems, because SetCPU can't handle switching between governors as it should.

Cheers,

Originally Posted by BlaY0

This is beyond the scope of this tread. You can try Chef Central but to be honest, if you don't know what this is or how it is done, then this (Android Development) is perhaps not the right forum for you.

I'll try to search about chef central and i am very new in linux OS.

but thank you...

I will learn because i have legend and i like it

Good for you

Chef Central is a subforum her on xda-developers...