Database Info

[GUIDE] Undervolting for better battery life

Since this is a popular topic and since MSNBERG requested that i make this, i have decided to make it.
THE GUIDE TO UNDERVOLTING
What you will need:
PREFERABLY the application Tegrak OVERCLOCK PAID! can also use set cpu
TEGRAK
LOAD THE OVERCLOCK MODULE
go into the "TWEAKS" section and be sure to select DEADLINE as your scheduler!!!
you will see the option "OPTIMIZATION" go there
now you will see 5 levels to customize
ONLY LEVEL 0 CAN YOU CUSTOMIZE EVERYTHING
Now if you only want to undervolt with no overclock here is the chart you need to use ON GINGERBREAD:
UNDERVOLT SETTINGS
level0 - 1000 - 1155 - 1065 -------this level can change frequency but volts need to change as well
level1 - 800 - 1040 - 1035
level2 - 400 - 955 - 960
level3 - 200 - 835 - 950
level4 - 100 - 825 - 930
once you enter these in you can go to tegraks main menu and go into "PROFILE" and you can save your current settings or choose previous ones.
Here are some overclock values you can use for level 0
LEVEL 0 1100 1100 1090
LEVEL 0 1200 1195 1095
LEVEL 0 1300 1295 1115
LEVEL 0 1400 1315 1125
LEVEL 0 1500 1375-85 1150
LEVEL 0 1600 1400 1175-1200
***THIS WILL BE UPDATED WITH MORE INFO SOON

In my best Mr. Burns voice: Excellent!

Always wanted a undervolting guide. Nice!

:C my phone reboots with these undervolt values for some reason. I'm running Valhalla 1.1(haven't has the time to update and don't have wifi so...) and adrenaline shot X. I also have stability checker off so I'm sure that's not the issue. Its fine at first but then rebootes once I start mulititasking like listening to music, texting and getting on Facebook at the same time. Seems to work fine for everyone else so I don't get what's going on
Sent from my SGH-T959V using XDA App

icy56 said:
:C my phone reboots with these undervolt values for some reason. I'm running Valhalla 1.1(haven't has the time to update and don't have wifi so...) and adrenaline shot X. I also have stability checker off so I'm sure that's not the issue. Its fine at first but then rebootes once I start mulititasking like listening to music, texting and getting on Facebook at the same time. Seems to work fine for everyone else so I don't get what's going on
Sent from my SGH-T959V using XDA App
Click to expand...
Click to collapse
What governor and scheduler.are.you using
Sent from my SGH-T959V using XDA Premium App

I'm using ondemand as the governor. I have no idea what a scheduler is.
*edit*
The io scheduler? Well its set to cfq.
Sent from my SGH-T959V using XDA App

Thanks a lot for this. I have been looking forward to this guide! Awesome work again Dsexton

icy56 said:
I'm using ondemand as the governor. I have no idea what a scheduler is.
*edit*
The io scheduler? Well its set to cfq.
Sent from my SGH-T959V using XDA App
Click to expand...
Click to collapse
Change cfq to deadline
Sent from my GT-P7510 using xda premium

jager555 said:
Change cfq to deadline
Sent from my GT-P7510 using xda premium
Click to expand...
Click to collapse
THANK YOU!!!! its finnaly working. Haven't had a single reboot yet. You sir just saved me a trip to T-Mobile. I thought there was something wrong with my phone since I was the only one getting that issue.
Sent from my SGH-T959V using XDA App

jager555 said:
Change cfq to deadline
Sent from my GT-P7510 using xda premium
Click to expand...
Click to collapse
Thats what I was going to say, good job
Sent from my SGH-T959V using XDA Premium App

thanks dexter like always!!
Sent from my SGH-T959V using XDA App

Hi guys,
Sorry for the rookey questions, but :
1. Do I need to install TegraK kernel ? If so, before or after installing TegraK overclock ?
2. Will TegraK OC free version do, or i need the paid version ? what's the difference ?
3. ICY56 - I'm having the exact configuration you have (Valhalla 1.1 and Adrenaline ShotX) can you please explain what changes you noticed regarding battery consumption, and doesn't it affect your phone responsiveness, stability and performance ?
Thanks,
Itzik.

Answers
1) Tegrak will work fine with valhalla, most (if not every) custom rom has the needed kernel already.
2) You need the paid version because free version only allows overclock up to 1.3 you cant adjust anything else.
3) I can't answer as I'm not set up the same, but from my understanding you shouldn't see any negative affects, just increased battery life.

Every time I try to undervolt my phone. It reboots constantly. Even with ICBINB KJ1. Scheduler is set to deadline and governor is set to ondemand. What am I doing wrong?

itzik2sh said:
Hi guys,
3. ICY56 - I'm having the exact configuration you have (Valhalla 1.1 and Adrenaline ShotX) can you please explain what changes you noticed regarding battery consumption, and doesn't it affect your phone responsiveness, stability and performance ?
Thanks,
Itzik.
Click to expand...
Click to collapse
Well I haven't noticed a decrease in performance and stability. The phone actually feels the exact same. As for bettery life, I can't really comment on that yet since I'm in the process of recalibrating my battery and I haven't been on UV long enough to say but so far battery life seems to be a little better
Sent from my SGH-T959V using XDA App

Nice work... tried and works .... 1600mhz looks like unstable in phone....
Sent from my SGH-T959V using XDA App

wizardslovak said:
Nice work... tried and works .... 1600mhz looks like unstable in phone....
Sent from my SGH-T959V using XDA App
Click to expand...
Click to collapse
It can be stable you just need to up voltages a lil more
Sent from my SGH-T959V using XDA Premium App

dsexton702 said:
It can be stable you just need to up voltages a lil more
Sent from my SGH-T959V using XDA Premium App
Click to expand...
Click to collapse
Well ill play with it more.... usually ill get restarts within few seconds of setting up new parms... thx again...
Sent from my SGH-T959V using XDA App

Even if I increase voltage it still freezes and then restarts phone @ 1600mhz
Sent from my SGH-T959V using XDA App

I've had 1664 mhz before stable. It can ne done, every phone will be different with what voltages work. experiment a little. But I wouldn't go to high, don't want a $500 paperweight.
@ 1.3 GHz, this phone its rock solid, so anything higher is over kill imo.
Sent from my SGH-T959V using xda premium

Performance governor questions

Correct me if I'm wrong but isn't the performance governor main thing is to lock up the CPU at the highest speed at all times?
Using latest ICS build by paradroid and latest ics build by harsh.
I also notice why do our phones don't have these other governors like on demand,lag free etc. We only have 2 the other one with being powersave, just asking because this battery goes down quick!
Sent from my LG-P999 using xda app-developers app

We don't have CPU performance governers because the tegra chip set isn't made like that, it has its own architecture that is made with its own governor for instance. Its made to work without anything like those. Something like that, hope this helps a little.
Sent from my LG-P999 using xda app-developers app

noahk423 said:
We don't have CPU performance governers because the tegra chip set isn't made like that, it has its own architecture that is made with its own governor for instance. Its made to work without anything like those. Something like that, hope this helps a little.
Sent from my LG-P999 using xda app-developers app
Click to expand...
Click to collapse
Yup pretty much what he said.
Oh course your battery is dying quickly, you're on ICS.

buru898 said:
Yup pretty much what he said.
Oh course your battery is dying quickly, you're on ICS.
Click to expand...
Click to collapse
Lol thanks dudes
Sent from my LG-P999 using xda app-developers app

System Tuner CPU governor question.

So I have been successful in using system tuner to set my CPU speeds and have them stick after reboot/shutdown. However my governor always falls back to on demand instead of my last selection. Is there any way to get this to stick?
Currently setting the startup as init.d. running synergy with their custom kernal.
Thank you!
Sent from my SCH-I535 using xda app-developers app

duarian said:
So I have been successful in using system tuner to set my CPU speeds and have them stick after reboot/shutdown. However my governor always falls back to on demand instead of my last selection. Is there any way to get this to stick?
Currently setting the startup as init.d. running synergy with their custom kernal.
Thank you!
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
Im in a similar pinch. If I want to make the on-demand governor remain permanent vs. the performance governor how can I make that happen?

You do have the "Set at boot" option ticked correct?
If that's not working you may need to use setCPU to do the "basics" for you and have System Tuner just do the rest. Here's a link to a free copy for XDA Members, http://forum.xda-developers.com/showthread.php?t=505419

cpu speed doesn't change

So I was on stock jellybean kernel with Beans build 9, and I tried to change cpu with voltage control to 1512 mhz, but it kept defaulting to 1028. I thought it was a kernel problem or app problem. I flashed kt47 kernel, and same thing, even though the settings said it is set at 1512, the dynamic mhz always shows it tops at 1028? Does anyone have a fix or seen something like this?

What program are you using to scale the cpu?

x714x said:
What program are you using to scale the cpu?
Click to expand...
Click to collapse
ok, so I WAS using voltage control, but
since, I have flashed kt47 kernel and is using ktweaker but the settings still don't stick. Even when I set the max as 1512, the dynamic shows 1080 as max... And whenever I restart the app, it asks if I want to change the minmax setting, if I don't, then it is clocked defaulted at 1080?

Do you have Power Saving enabled?
Sent from my SCH-I535 using xda app-developers app

SlimSnoopOS said:
Do you have Power Saving enabled?
Sent from my SCH-I535 using xda app-developers app
Click to expand...
Click to collapse
HOLY [email protected]#%^*, Thanks so much!!! LOL, I'm so stupid..

dragon1357 said:
HOLY [email protected]#%^*, Thanks so much!!! LOL, I'm so stupid..
Click to expand...
Click to collapse
Lol thank x714x too!
Sent from my SCH-I535 using xda app-developers app

CPU frequency getting stuck at highest frequency

I've looked and searched everywhere but I can't find anything like this. On all of the JB roms, all of a sudden, my CPU frequency sits at the highest speed and won't move no matter what governor I use. Is there any way to solve this, I'm really at a loss. I installed CPU spy and it's showing that deep sleep is not used and that only 1200 MHz(the highest CPU setting I'm using) is being used. Help please. Thanks in advance.

if a reboot doesn't fix it, you need to wipe and reflash

qkster said:
if a reboot doesn't fix it, you need to wipe and reflash
Click to expand...
Click to collapse
Yeah, tried that already, a few times. I think it has something to do with my sd card. I'm gonna format it and see what happens.

So..I went all the way back to stock, and came back to JB and still experiencing the same problem. When I flash a JB rom, the CPU frequency gets stuck at the highest frequency until I select a different governor and reselect the one I want to use. Any help would be appreciated.

which roms have you tested? and are you using nstool to adjust your governors and schedulers?

-illest- said:
which roms have you tested? and are you using nstool to adjust your governors and schedulers?
Click to expand...
Click to collapse
I've tested avatar, Beanstalk(my daily driver), Cyber...
Nd yes, I am using the built in performance menu, but it has the same settings as nstools
Sent from my SGH-I997 using xda app-developers app

Are you using NSTools along with the built in performance menu? I had the same problem on Beanstalk with the SmartassV2 governor where my cpu would stick at 1200 mHz, but once i removed NSTools, smartass worked fine. perhaps try disabling or removing nstools?

Oh okay, I see what you are saying. I really like BLN, so you just don't use bln anymore?
Sent from my SGH-I997 using xda app-developers app

well try and see if it works. if your using beanstalk, then you can just use the BLN control - free app that scott has included as an addon. this app will enable BLN with timeout. you just can't change the blink speed with this app.

Well I disabled nstools and everything seems to be back in order. I'll report back if I see something else.
Sent from my SGH-I997 using xda app-developers app