Database Users

[REF] UPDATE: ALL GOVERNORS! :) Save battery while running ANY Android build

As android builds are getting more and more closer to being daily builds, one of the standing issues that remains is battery life.
This thread is where posts concerning How to Save battery should go. NOT Questions, but suggestions. If your suggestion is one to look into, it will be added to the OP.
UPDATE: You can now use ALL GOVERNORS For the CPU!​ (Read more to find out how) ​--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
SetCPU​
SetCPU, is an app more commonly used for over/under clocking devices.
This short tutorial will show you how you get the app,
get it running, and of course save battery!​
*YOU NEED A ROOTFS.IMG THAT GRANTS YOU ROOT ACCESS!*
1. Get SetCPU
A. Download it from *HERE*. (The only XDA thread I could find for it)
OR
B. Support this great application and get it from the Android market by searching for SetCPU.
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2. Getting the App working
1. Once you have the application installed, launch it from your drawer and either grant it Root Permissions or it may auto-configure.
2. Hit Auto Detect Speeds.
3. It should show you the speeds your device it currently running at, now move over to [Profiles] and click Enable and if you want click on Notification.
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3. Make your profiles
1. Sleep Profile - 384 Max/245 Min- Interactive setting
(It may seem high, but this keeps it so that your device wakes up quickly)
2. Battery < 30
Max 614/460 Min- Interactive/Conservative Setting
*Try out the SetCPU Widget!*
If you have any personal settings that you think might be better than these please do post!
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UPDATE 9/15​ ALL CPU Governors!
To use the modules use this kernel built from the GIT, and hit auto detect speeds on SetCPU again. Under the main tab choose Your preferred setting..
You can find what all the the kernels differ in in the further pages of this thread, I will update OP later.
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Advanced Tab
20000 Sampling Rate
30-50 Up Threshold (THIS IS THE KEY: This means when your CPU load hits 30%, it will scale up the mhz. If the phone still responds too slow for your taste, set this lower)
http://forum.xda-developers.com/showthread.php?t=777921
Check Set on Boot (And Apply)
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Turning off Background Services and Adjusting Brightness​
Things like Bluetooth, WiFi, Sync, GPS, and excessive brightness can really kill your battery.
A quick way to manage these settings is to hold down to add a widget on your home screen and choose [Power Widget].
This stock widget allows you to quickly see the service's your using, and the farthest one to your right allows you to switch between four brightness settings.
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Using that new kernel link provided, you'll get a nice boost in standby time too! Enjoy!

Additional battery saving tips:
* Don't use a live wallpapers
* Turn off 3G connectivity (Eclair-based ROMS need apps like APNDroid to do so)
* Turn off Background-enabled data transfers in the Sync page.

the app screebl is a battery saver for whenever you have your screen on.
MOD EDIT:
Screebl Pro is a PAID FOR APP..
Link deleted and warning given please do not post warez in the future.
Mark.

Is that a Paid application from the Market? If so it is warez. (Big No-No)

Shatterv2 said:
Is that a Paid application from the Market? If so it is warez. (Big No-No)
Click to expand...
Click to collapse
no it's donation-ware. You can find SetCPU in the G1 device section of the XDA forums for free...
http://forum.xda-developers.com/showthread.php?t=505419

Can we have on our hd2 a folder with Android Sdk ? Like in a rooted one ?

aussiebum said:
no it's donation-ware. You can find SetCPU in the G1 device section of the XDA forums for free...
http://forum.xda-developers.com/showthread.php?t=505419
Click to expand...
Click to collapse
Yes that was already stated in the OP

Shatterv2 said:
*YOU NEED A ROOTFS.IMG THAT GRANTS YOU ROOT ACCESS!*
Click to expand...
Click to collapse
Can you post one?

Ultimaex said:
Can you post one?
Click to expand...
Click to collapse
read here: http://forum.xda-developers.com/showpost.php?p=7088391&postcount=4

Thanks for the tips!

Ultimaex said:
Can you post one?
Click to expand...
Click to collapse
Rooted RootFS.img files by michyprima can be found *HERE* in the Installation Instructions section.
Mark.

SetCPU forcecloses on me with dan's froyo without sense. Anybody get this combo to work for them? Also, I did replace the rootfs file.

Strange, try the new froyo build by Darkstone.

reocej said:
SetCPU forcecloses on me with dan's froyo without sense. Anybody get this combo to work for them? Also, I did replace the rootfs file.
Click to expand...
Click to collapse
Yeah, I'm using SetCPU 2.01 with Dan's v1 vanilla froyo fine. When set to use "ondemand" CPU Governor and Autodetect speeds, getting much better battery life - it's only dropping ~1% every hour now EDIT: when idle, of course

aussiebum said:
Yeah, I'm using SetCPU 2.01 with Dan's v1 vanilla froyo fine. When set to use "ondemand" CPU Governor and Autodetect speeds, getting much better battery life - it's only dropping ~1% every hour now EDIT: when idle, of course
Click to expand...
Click to collapse
Happy to help!

Next thing (when I get around to it) is probably to try out the Conservative CPU Governor module... that will correctly scale CPU power according to load (ie. 245mhz => 384, etc) instead of like On Demand, where it jumps from 245mhz => 998mhz => lower....

ATK
My favorite Ap Right now: Advanced Task Killer - you can find it on market for free. With this you can kill tasks who run in backround etc.

RuffRap said:
My favorite Ap Right now: Advanced Task Killer - you can find it on market for free. With this you can kill tasks who run in backround etc.
Click to expand...
Click to collapse
Use Taskiller. Red Icon in the market. Free App is the exact same as the paid one. Kills tasks as well but detects tasks that ATK cant. Includes features like End apps once screen turns off and kill all apps 10sec's after boot. Great App IMO.

I've found out that JuiceDefender does a good job as well. If you buy the extension (UltraDefender?) it also has a CPU governer module which regulates your CPU speed based on usage.

maseo said:
I've found out that JuiceDefender does a good job as well. If you buy the extension (UltraDefender?) it also has a CPU governer module which regulates your CPU speed based on usage.
Click to expand...
Click to collapse
No need to pay - as I mentioned before, the "conservative" cpu governor module that is freely available (do a search!) will do exactly what you mentioned when used with SetCPU.

[Q] setcpu not working

I am using an hd2, and i have noticed something that may be causing a lot of battery drain, that is consistent among every build that I have used. When I use setcpu, and give it root access, and whether i select auto detect or manually put in nexus one/snap dragon, it does not listen to the cpu cap that i put. i will exit the app, and go back to it, and the cpu clock speed with almost always exceed the cpu cap that i set, and many times, it will be running at the full 998 mhz. why is this, and how can i fix it?

I uninstalled SetCPU the other day as a little experiment. It makes f-all difference to me. In fact it makes things worse.

no longer needed with the latest kernels

metaltorizo said:
I am using an hd2, and i have noticed something that may be causing a lot of battery drain, that is consistent among every build that I have used. When I use setcpu, and give it root access, and whether i select auto detect or manually put in nexus one/snap dragon, it does not listen to the cpu cap that i put. i will exit the app, and go back to it, and the cpu clock speed with almost always exceed the cpu cap that i set, and many times, it will be running at the full 998 mhz. why is this, and how can i fix it?
Click to expand...
Click to collapse
This problem seems to relate to a kernel feature called perflock .. disabling this in-kernel allows the cpu cap in setcpu to be adhered to .. Unfortunately this is done at compile time and has no userland interface to use. I dont think its relating to all the battery drain you see but for sure if you limit cpu speeds with profiles like screen off it will have an effect.

try updateing super user libraries.

BurekUSvemiru said:
try updateing super user libraries.
Click to expand...
Click to collapse
Whats that then ?

how would i go about updating the su libraries? does anybody have an actual fix to this, because i would think my battery would be a lot better if the set cpu app was actaully working. and no, the latest kernels dont seem to be doing their job, because they all burn through juice like theres no tomorrow.

u have 2.04 installed ? it fc'd for me , now im using 2.02 no problems , try that

metaltorizo said:
how would i go about updating the su libraries? does anybody have an actual fix to this, because i would think my battery would be a lot better if the set cpu app was actaully working. and no, the latest kernels dont seem to be doing their job, because they all burn through juice like theres no tomorrow.
Click to expand...
Click to collapse
You don't update the su libraries .. su is either a static file or a link to busybox .. i cba looking right now .. probably a binary compiled statically ..
To have your issue resolved have a word with your friendly neighborhood kernel builder and ask him to disable perflock .. Its not needed for normal operation.

I'm having the same problem. Does anyone know how to get setcpu to work?! I have an HD2 running darkstone Froyo.

economy kernel

hello.
could you help me to chose economy kernel for my device i9000.
i need more working time on my device.
thx for answers

Well, if you are willing to sacrifice some power you could underclock with Damian's ultimate kernel and as well undervolt (whatever your phone can handle)
apart from changing the kernel, have you tried tasker? this app can really help you to save some battery...

I dont no about Kernels But ive heard 'insanity' ROM is amazing on battery life without losing speed and features.
check for it under development and see what Kernel people are using with it.

i try to underclock CPU but program that i use cant use all frequency only 100 - 500 mhz.
can you give me advice what program can underlock CPU and good task killer.
i need much web serfing

elxeon said:
i try to underclock CPU but program that i use cant use all frequency only 100 - 500 mhz.
can you give me advice what program can underlock CPU and good task killer.
i need much web serfing
Click to expand...
Click to collapse
as for now, try damian's kernel, underclocking setting is in the recovery menu. As far as I know, he is working on an app for the new kernel but just try version 1.1
Concerning task killers, I found out that they do more harm than good. Don't use them...
The problem with web surfing is that the display is on all the time (what else?!^^) and it consumes a lot! there is not much one can do about it...

how can i reduce consamption of display? can i change white color on black in browser? to reduce consamption of energy?

elxeon said:
how can i reduce consamption of display? can i change white color on black in browser? to reduce consamption of energy?
Click to expand...
Click to collapse
I assume you have already set brightness to minimum, in addition you could use the app "screen filter" which makes the display even darker but then it is only readable in the dark.

Do you set your brightness to automatic ?? thats a big help
As for changing display color i dont know if thats possible, unless you can find a themed version
EDIT: sorry just noticed the above post

GMH24 said:
I assume you have already set brightness to minimum, in addition you could use the app "screen filter" which makes the display even darker but then it is only readable in the dark.
Click to expand...
Click to collapse
i already done all your advice
may be thomething else?)
i use program that control brightness but i forgot how it's called. i download it from android marke and than reflash device
and say please One Click Lag Fix APK decrease or increase reducing power?

lagfix will always reduce battery life, but the more updated lagfixes use less, but still use more than stock.
Have you got the app "juicedefender" thats a good app and i have been using it daily for months.

elxeon said:
and say please One Click Lag Fix APK decrease or increase reducing power?
Click to expand...
Click to collapse
I ran some test cycles with speedmod and ultimate kernel with both standard file system and converted system. Therefore, I can say that just changing the filesystem does not influence battery life in any way noticeable.

azzledazzle said:
lagfix will always reduce battery life, but the more updated lagfixes use less, but still use more than stock.
Have you got the app "juicedefender" thats a good app and i have been using it daily for months.
Click to expand...
Click to collapse
it's realy working?
thx i will test it.

GMH24 said:
I ran some test cycles with speedmod and ultimate kernel with both standard file system and converted system. Therefore, I can say that just changing the filesystem does not influence battery life in any way noticeable.
Click to expand...
Click to collapse
as i know One Click Lag Fix APK change only file system?

its not MEGA improvement but the donate version has more options. what it does is cuts off all connectivity on screen off, so nothing is being used when it shouldnt be.
its really good IMO, and the partner to the app is 'juice plotter' this will identify what running processes are happening when the phone is idle, allowing you to modify to save battery life a little more. another similar app which is also good but a little hard to understand is 'task identifier' this is similar to juice plotter,
it tells you what apps and processes are starting up automatically. Over night i found 48 processes happening when i was sleeping. THAT drains battery

What exactly are your battery stats?
how long does your phone last on one charge? how long is the display on? how long do you call?

elxeon said:
i already done all your advice
may be thomething else?)
i use program that control brightness but i forgot how it's called. i download it from android marke and than reflash device
Click to expand...
Click to collapse
I like speedmod's modification on screen brightness that allows for even lower brightness than I got from voodoo kernel. No idea if other kernel has such feature.

on one full charge i get roughly 2 days.
display is on automatic and i make about 5 - 10 calls a day, and text all day, i manually push emails every few hours and browse the market / xda / youtube for a few hours a day.
Im not a heavy user, but i play alot of games ( especially angry birds ) im more than happy with my battery usage.
Im also on the JQ1 modem, if this is of any use.

If you want to use screen filter, leave the brightness at automatic and it is great in all but the brightest sunlight. I use auto brightness and 60% filter to good effect. You can create a widget, so it can be turned off if required. It also plugs in to Tasker if you want to set up automatic profiles.
Also, the Super Optimized Kernel is worth a look. Each OC/UV value can be completely customized (unlike DamianGTO's kernel, which relies on a series of presets), using the "Voltage Control" app.
I would stay away from Ext4 lagfixes if battery life is of upmost importance. That said I use lagfixes and am torn between JFS and Ext4 with 'unsafe' mount options (selected in recovery). EXT4 with 'safe' mount options uses far too much battery IMO.
JFS is somewhat unstable, and EXT4 'unsafe' can become corrupt after an improper shutdown. The battery life with ext4 'unsafe' is slightly worse than JFS, but you get a corresponding slight increase in performance. Try each for a day if you go that route before choosing, but for the reasons described above be prepared to reflash in case of disaster...

[Q] cpufreq parameters without using 3rd party apps

Hello.
I've got a stock Android 3.2.1 (A501 4.066.29 COM GEN1) rooted with Stock/HV/Taboonay V3.7 for HC 3.2 16-10 - 1.64Ghz/UV control kernel.
The question is:
how to set cpufreq parameters (governor, max_freq,..) WITHOUT using 3rd party apps so that the parameters were restored after reboot.
Thank you for reading this.

Either the kernel needs to support init.d scripts or a service needs to execute on boot.
That kernel doesn't support init.d and Voltage Control has a startup service.

CuriousTech said:
Either the kernel needs to support init.d scripts or a service needs to execute on boot.
That kernel doesn't support init.d and Voltage Control has a startup service.
Click to expand...
Click to collapse
Forgive my ignorance but I can't put to use your answer.
I don't get where is Voltage Control and what I have to do.

Get Voltage Control from the market, make adjustments, save as boot. You'll be given the option to save as init.d script or startup service.

Well.. I tested it. Odd app.
First of all it can see only one core. It's funny. After reboot cpu0 works in conservative mode, max_freq 1.4 GHz and cpu1 in ondemand mode, 1.0 GHz.
I tried to edit init.d script and add the 2nd core but after reboot cpu worked with the default kernel values - script didn't work at all.
Moreover Voltage Control shows voltages turned upside down - the less cpu frequency the bigger voltage values. I fear to use this app

Download setcpu or antutu cpu master it recognizes dualcore , has the boot option

More education would be advised To you PLEASE DONT BREAK YOUR TABLET
Please do not take this the wrong way..
it does sound like you do not know what your doing.. I suggest you read more about over clocking./under voltage of a TEGRA 2 DEVICE.. That will get you more understanding about what you need to do. And maybe even help you decide if you really want to do this or not.. There is alot of resources online about this subject. I have tried custom kernel with set cpu.. I use it on my 650 mhz phone. clock it to 768. but it has a huge battry issue when running at that speed.Not to mention It would be dangerous to leave it on my purse with something running might be a fire bug.. GOOD LUCK .

Basically lower voltage at higher frequencies keeps the CPU stable. Leaving it linear would increase temperature exponentially.
Script Manager can run scripts on startup but I don't know how you could disable them if they keep it from starting up.
I didn't know about VC and dual core though. My bad.

ef1x said:
Download setcpu or antutu cpu master it recognizes dualcore , has the boot option
Click to expand...
Click to collapse
Thank you.
I tried all cpu related apps from the Market that I was able to try. Now I want to try to get along without them.

erica_renee said:
Please do not take this the wrong way..
it does sound like you do not know what your doing.. I suggest you read more about over clocking./under voltage of a TEGRA 2 DEVICE.. That will get you more understanding about what you need to do. And maybe even help you decide if you really want to do this or not.. There is alot of resources online about this subject. I have tried custom kernel with set cpu.. I use it on my 650 mhz phone. clock it to 768. but it has a huge battry issue when running at that speed.Not to mention It would be dangerous to leave it on my purse with something running might be a fire bug.. GOOD LUCK .
Click to expand...
Click to collapse
Thank you Erica

I don't understand? You want something that does the same thing but you don't want to know it's there?
I found one app called System Tuner that lets you adjust CPU frequencies individually. I don't know why though.

CuriousTech said:
Script Manager can run scripts on startup but I don't know how you could disable them if they keep it from starting up.
Click to expand...
Click to collapse
Thank you but it looks too bulky for such a small task. And I still don't want to use 3rd party apps

CuriousTech said:
I don't understand? You want something that does the same thing but you don't want to know it's there?
I found one app called System Tuner that lets you adjust CPU frequencies individually. I don't know why though.
Click to expand...
Click to collapse
Actually I don't like how these apps work. And I thought that setting up a few parameters would't be difficult. It seems I was wrong.

Yep. Code has to execute to do stuff, otherwise that stuff doesn't get done.

System Tuner Pro allows voltage adjustments on overclock settings. If you're interested. Also, has a lot of packages integrated into one (task manager, app freezer, etc). They have a free version in the Market if you're interested. It's nice to have several apps, in one nice package.

Moscow Desire
Thank you but I actually don't need it anymore
I have rolled back to the stock kernel because of constant "sleep of death" issue.

huck_d said:
Moscow Desire
Thank you but I actually don't need it anymore
I have rolled back to the stock kernel because of constant "sleep of death" issue.
Click to expand...
Click to collapse
It's because the 3.7 kernel you used, is really not compatible with the a501. The ultra-low voltage causes "screen freeze" and the "sleep of death" when under 3g only. It's a known issue with the 501 and 3.6 and 3.7 kernels also. I would reccommend RTrips 3.4+. Probably his best for for a501.
I ship it with my own Alexandra II and III rom. No issues with it, and none ever reported.
Had I noticed when I woke this morning, you had an a501, I could have given this advice. Sorry, didn't have enough coffee
---------- Post added at 02:21 PM ---------- Previous post was at 02:18 PM ----------
Moscow Desire said:
It's because the 3.7 kernel you used, is really not compatible with the a501. The ultra-low voltage causes "screen freeze" and the "sleep of death" when under 3g only. It's a known issue with the 501 and 3.6 and 3.7 kernels also. I would reccommend RTrips 3.4+. Probably his best for for a501.
I ship it with my own Alexandra II and III rom. No issues with it, and none ever reported.
Had I noticed when I woke this morning, you had an a501, I could have given this advice. Sorry, didn't have enough coffee
Click to expand...
Click to collapse
The problem, is that a lot of dev's, don't have a501's, only a500's. So they really can't test a lot on it. And sometimes, the issue doesn't happen for 2 or 3 days. Sometimes less. I'm going to experiment a little this weekend, with some of the newer kernels, and mess with the voltage's and see if I can get it stabilized where it doesn't freeze on 3g only.

Moscow Desire ,
Thanks for clearing it up and the advise. I'll try either 3.4 kernel or your ROM.

huck_d said:
Moscow Desire ,
Thanks for clearing it up and the advise. I'll try either 3.4 kernel or your ROM.
Click to expand...
Click to collapse
If you go to RichardTrips kernel thread, you will see a link to his older kernels.
You will find the 3.4 listed on his server. I think you just need to flash it, although I usually dump Dalvak cache.
Alex II is an easy install. Alex III (3.2.1) is a little more ... interesting to install, but not difficult. If you run into an issue, post it in my thread. Everybody else has got it installed, so I think you'll have no issues either.
It's the only "certified" 3.2.1 for the Acer a501 that I know if. Not that the other roms are bad, because they really are good, but, the 3.2.1 they advertise, are from system dumps after running an update, or adding missing files to a 500 rom. The TMPL is an Acer release.

Help me: Need maximum battery time

I need maximum battery time. So what is the best kernel for this and it´s configuration? I don´t need answers like "search for it" . Go hell those stupid guys.

voidvader said:
I need maximum battery time. So what is the best kernel for this and it´s configuration? I don´t need answers like "search for it" . Go hell those stupid guys.
Click to expand...
Click to collapse
there is no such thing as perfect kernel or perfect configuration,
the factors that can determine the amount of battery usage depends heavily on the nature of the usage under the user itself,
most kernels with undervolt support and underclocking will do fine,
i'd suggest you try out tweaks and preferences yourself since no one can guarantee you an exact time frame,
but i'll give you mine,
ROM: WP8 Monochromatic 5.1
Kernel: Built-in rom (savie's)
Tweaks: Built-in rom
Scaling freq: 156min 624max
CPU Governor: ondemandx
reduced all bloatwares even gmail and maps,
Battery Time (heavy usage): 4hrs max (medium usage): 1-1.5 day max (minimal usage) 2-3days max
that's just about it,
please take the time to conduct a research on what is your best prefered battery saving method,
don't call anyone stupid,
it's bad and potato disapproves

Rom doesnt matter really if you manage the applications well.
Use kuros kernel + kuros tweaks. Thats the best battery saving combo Ive tried.
For governor, use ondemand, the most battery efficient governor and use deadline for i/o
deathnotice01 said:
there is no such thing as perfect kernel or perfect configuration,
the factors that can determine the amount of battery usage depends heavily on the nature of the usage under the user itself,
Click to expand...
Click to collapse
Not really. Change between Merruk #206 and kuros latest, you can really notice the battery drain difference. Its battery efficient than stock kernel in my tests.

Here u go:
Before all id reccomend updating the software to the latest version xD
Use the latest white kernel
Use v6 supercharger and some other tweaks
Reduce the screen brightness
Lower the system volume in the sounds options
Disable animation
Disable auto-sync
Disable backup settings
Disable roaming ^^,wifi,mobile internet,bluetooth when you dont use it(gps even if turned on allways is only actually active when theres a open app that uses gps ^^)
Disabling more sound effects will make it ugly and not cool lol,so do as u wish with thease:
Keyboard sounds
Lock screen sounds and vibration
set a boot frequency in set cpu like:
312-832,conservative,sio
Set up proper profiles in set cpu like
Screen off
312-312,powersave,noop
Charging
312-832,ondemand,sio
Battery 50 F
312-832, conservative,noop
Battery <16
312-832, conservative, noop
here just take my setcpu profiles, i made it in setcpu 3.07 just put it in the root of your sdcard and in setcpu enable profiles and click on restore profiles and click on that
http://www.mediafire.com/?ru786ho4o9i7jdp
Here are some build.prop tweaks
ro.ril.power.collapse=0
ro.ril.disable.power.collapse=0
dalvik.vm.heapstartsize=4
dalvik.vm.startheapsize=4
this one is alredy in v6 supercharger ;P
pm.sleepmode=1
remove some useless apps that u dont use but their allways running in the background(yeah remove anything u will never use)
Google maps
email(not gmail)
software update
and buying a new, better battery isnt a bad idea too ? is it (obviously xD)
I hope i Helped, this and some of my other build.prop tweaks made my battery go like lol xD it was lasting so long idk how much was it

Thank you all! Thanks so much guys!:good:

Filip98 said:
Here are some build.prop tweaks
ro.ril.power.collapse=0
ro.ril.disable.power.collapse=0
dalvik.vm.heapstartsize=4
dalvik.vm.startheapsize=4
this one is alredy in v6 supercharger ;P
pm.sleepmode=1
I hope i Helped, this and some of my other build.prop tweaks made my battery go like lol xD it was lasting so long idk how much was it
Click to expand...
Click to collapse
the correct one is "dalvik.vm.heapstartsize". dalvik.vm.startheapsize is not exist. nevertheless, this script only work for ICS. GB based rom doesnt have these prop. please be carefull with any prop for virtual memory like this one. if you clean your dalvik-cache you might ended up in bootloop.

Lots of information.
Thanks guys.
Sent from my GT-S5360 using xda premium