Related
Recently i've ventured into kernel threads wondering how i can get better battery life on my G2. I consider myself pretty well versed in roms but Kernels are a whole new animal for me.
I have read so many threads im becoming dizzy. If i have to flash a kernel for better battery, which one? I dont have demands for a faster phone. Most of the threads about kernels i have read are all about getting a faster clock. Im fine with the speed of my G2. I just want better battery.
Can some one provide me with some literature on the subject, point me in the right direction, or even better, answer some questions for a noob in this particular subject??
What Kernel to use?
Can i flash over CM 6.1 Stable?
Do i need to wipe before flash?
Any assistance will surely allow me to sleep better at night.
Thank you in advance.
I can tell you im running virtuous 7.2 i find pershoots kernel the best for battery.
Sent from my HTC Vision using XDA App
shortlived said:
I can tell you im running virtuous 7.2 i find pershoots kernel the best for battery.
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
If you want great battery life, don't use a sense rom. They're battery hogs as it is. Stay on CM 6.1 and flash pershoots latest kernel. Get setcpu and set a profile to 245/245 when the screen is off.
With these settings I get awesome battery life and I'm overclocked to 1497.
Sent from my HTC Vision using XDA App
rp1783 said:
If you want great battery life, don't use a sense rom. They're battery hogs as it is. Stay on CM 6.1 and flash pershoots latest kernel. Get setcpu and set a profile to 245/245 when the screen is off.
With these settings I get awesome battery life and I'm overclocked to 1497.
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
Oh ya i learned through trial and error to stay away from sense roms.
Can i ask you why you overclock? I dont find myself in any moments where i think the phone should be going faster.
I can flash pershoots over cm with no problems?
Can i get a link?
thanks for the response.
Well i lpike sense but only when its ocd sense too sluggish on stock g2 speeds. Also even with ocing and runing sense my bat last just about all day. It sometimes needs a shot a juice if im useing gps or playing a lot of games but thats it.
Sent from my HTC Vision using XDA App
Decent battery life on my G2.
I'm running htc sence on mine with the pershoot kernal and cpu tuner.I have tweaked profiles and my battery life is better than b4.Example, i took it off the charger(ac) yesterday morning @ about 9:20am & today Thur, i checked the [email protected] 11:50am and my battery is only @ 40%.(1 day,3hrs & 31min's later)not bad.That's WITH moderate use.
Utorrent76 said:
I'm running htc sence on mine with the pershoot kernal and cpu tuner.I have tweaked profiles and my battery life is better than b4.Example, i took it off the charger(ac) yesterday morning @ about 9:20am & today Thur, i checked the [email protected] 11:50am and my battery is only @ 40%.(1 day,3hrs & 31min's later)not bad.That's WITH moderate use.
Click to expand...
Click to collapse
So whats CPU Tuner? Do you have some suggestions for how to tweak the profile? Can i get a link to the pershoots thread? Is this the right thread? --> http://forum.xda-developers.com/showthread.php?t=847672
Do I have to wipe before flashing and then reinstall cm over it?
When I went into SetCPU, it always kinda confused me. That could be why I was never interested in overclocking.
I realize I have a lot of questions. Im just a careful and thorough person.
Simple.
@dangabob13...Don't worry about all the questions i'd want to b super carefull as well.First, cpu tuner is a free app in the market much like set cpu except u get more options as far as customizing your profiles.Second you can find the pershoot kernel right with in rom manager.Just go to the download rom section & its the 3rd one down.I didn't wipe and i haven't had any problems.The reason i switched to the pershoot kernel was because i was having problems waking up the screen with HTC sense and the kernel it came with.This fixed the issue for me.No need to b confused it's actually pretty simple.My profiles for cpu tuner are as follows:
Under the "Current" tab: i have the governor set to "conservative" i have the cpu o.c to 1094 MHZ.No need to go crazy over clocking i find this to b fast enough for now. The rest of my profiles:under the "profiles"tab,
Performance:Ondemand-Max:1094 Ghz,Min:768Mhz.
Good:Conservative-Max:1094Ghz,Min:768Mhz.
Normal:Conservative-Max:1094Ghz,Min:768Mhz.
Power save:Conservative-Max:1094mhz,Min:768Mhz.
Screen off:Conservative-Max:768Mhz,Min:768Mhz.
Extreme Power save:Conservative-Max:768Mhz,Min:768Mhz.
Keep in mind i also have wifi,blutooth,sync all disabled as well.I'm not saying this is guaranteed to work for you, I'm simply stating what works for me. Good luck i hope this helps.
Quick question....doesn't CM6.1 Stable have the pershoot kernel already? Also does the Pershoot kernel the one that goes to 1.8Mhz?
Not that I'm interested in going that high, but just wondering.
I OC for games mainly, but also to watch tv and movies, the extra umph really helps. My setup on SetCPU are:
Temp>40.2*C 368 / 245 Powersave Priority 100
Screen Off 245 / 245 Powersave Priority 90
Charging/full 1497 / 245 Interactive Priority 85
Battery<10% 268 / 245 Conservative Priority 80
Battery<30% 806 / 245 Conservative Priority 70
Hope this helps.
Utorrent76 said:
@dangabob13...Don't worry about all the questions i'd want to b super carefull as well.First, cpu tuner is a free app in the market much like set cpu except u get more options as far as customizing your profiles.Second you can find the pershoot kernel right with in rom manager.Just go to the download rom section & its the 3rd one down.I didn't wipe and i haven't had any problems.The reason i switched to the pershoot kernel was because i was having problems waking up the screen with HTC sense and the kernel it came with.This fixed the issue for me.No need to b confused it's actually pretty simple.My profiles for cpu tuner are as follows:
Under the "Current" tab: i have the governor set to "conservative" i have the cpu o.c to 1094 MHZ.No need to go crazy over clocking i find this to b fast enough for now. The rest of my profiles:under the "profiles"tab,
Performance:Ondemand-Max:1094 Ghz,Min:768Mhz.
Good:Conservative-Max:1094Ghz,Min:768Mhz.
Normal:Conservative-Max:1094Ghz,Min:768Mhz.
Power save:Conservative-Max:1094mhz,Min:768Mhz.
Screen off:Conservative-Max:768Mhz,Min:768Mhz.
Extreme Power save:Conservative-Max:768Mhz,Min:768Mhz.
Keep in mind i also have wifi,blutooth,sync all disabled as well.I'm not saying this is guaranteed to work for you, I'm simply stating what works for me. Good luck i hope this helps.
Click to expand...
Click to collapse
I dont have a conservative option under the Governor dropdown. is that important. Otherwise i duplicated your settings. Boasting 27 hours of up time and 40% left is bound to make me jealous ill test it out. Thanks again.
That's strange is your cpu tuner app up to date? I also wanted to mention that my screen brightness is set to 20%,heptic feed back is turned off and so is vibration. Along with a few other battery saving options you should see a difference in battery life.Obviously results will vary.
Utorrent76 said:
That's strange is your cpu tuner app up to date? I also wanted to mention that my screen brightness is set to 20%,heptic feed back is turned off and so is vibration. Along with a few other battery saving options you should see a difference in battery life.Obviously results will vary.
Click to expand...
Click to collapse
Ha its so funny. I have the same exact settings. i took a look around and turned off all that stuff. I keep my GPS on because it only uses battery when its being used. But i turn off wireless locations so that its not always trying to centralize my location.
I'm using the setcpu app and whenever I apply a "when screen off" profile and put my phone to sleep it won't turn back on. I set it to 200-400mhz and it doesn't turn back on and I think the govenor is conservative.
I am running randomrom pheonix with genocide 2.0 kernel.
Can anyone tell me what they have their profile set as or what is a good low value I can set my phone to so that it still runs but doesn't waste too much battery life while its off. Any kind of help is appreciated.
Sent from my SPH-D700 using XDA App
Don't use profiles
I wish I could be of more assistance, but basically, I remember many of the more experienced forum members here suggesting that you do *not* use profiles with SetCPU on the Epic 4G.
I am running the Genocide 2.0 kernel on my Epic with SetCPU set to a max of 1120 and min of 100 MHz, with no profiles set and the governor set to conservative. Haven't had any issues.
Also, I use a widget called Temp+CPU PRO that dynamically shows you the clock speed of the CPU, so you can tell when it's at 100 MHz and so forth.
From what I've seen, the speed of the CPU ramps down to 100 MHz on its own when the phone is idle.
Oh.. well I have never seen that.. I heard ppl talking about setcpu is better than voltage control so I thought it was cuz of the profiles.
So about how many hours do u get out of ur phone? What rom r u using with that kernel?
Sent from my SPH-D700 using XDA App
lilajrestnom said:
Oh.. well I have never seen that.. I heard ppl talking about setcpu is better than voltage control so I thought it was cuz of the profiles.
So about how many hours do u get out of ur phone? What rom r u using with that kernel?
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
I get an average of about 11 hours on a single charge. Mainly because I'm a Facebook addict
Right now, I'm using the ERA ReVolted Rom v.6 Reduced Fat version.
GRK4G63 said:
I get an average of about 11 hours on a single charge. Mainly because I'm a Facebook addict
Right now, I'm using the ERA ReVolted Rom v.6 Reduced Fat version.
Click to expand...
Click to collapse
Lol well I use internet a lot for downloading stuff and I txt all day long get a few phone calls and I average a couple hours.. yesterday I played a game and downloaded some music talked a lil and txt the whole time and it lasted from 10 30am until like 1pm and I had 8%. I don't understand how ppl can say they get over 20 hours.
Sometimes I can make it last 12 hours but that's when I just txt and don't do nothing else.
Sent from my SPH-D700 using XDA App
lilajrestnom said:
Lol well I use internet a lot for downloading stuff and I txt all day long get a few phone calls and I average a couple hours.. yesterday I played a game and downloaded some music talked a lil and txt the whole time and it lasted from 10 30am until like 1pm and I had 8%. I don't understand how ppl can say they get over 20 hours.
Sometimes I can make it last 12 hours but that's when I just txt and don't do nothing else.
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
There are a lot of good posts on here about maximizing your battery life. Most of it requires some functionality to be sacrificed, so it's all about your personal preferences.
Our AMOLED screens are purty, so even though I keep mine dim to save battery, once in a while, say when watching a movie on the phone, I'll crank up the brightness all the way to make the visuals pop. Do a few searches, read up, and then tweak, tweak, and tweak some more until you find that "sweet spot" that works for you.
Of course, hooking yourself up with one of those monster 3500 mAh batteries wouldn't hurt, either. Just sayin'
GRK4G63 said:
There are a lot of good posts on here about maximizing your battery life. Most of it requires some functionality to be sacrificed, so it's all about your personal preferences.
Our AMOLED screens are purty, so even though I keep mine dim to save battery, once in a while, say when watching a movie on the phone, I'll crank up the brightness all the way to make the visuals pop. Do a few searches, read up, and then tweak, tweak, and tweak some more until you find that "sweet spot" that works for you.
Of course, hooking yourself up with one of those monster 3500 mAh batteries wouldn't hurt, either. Just sayin'
Click to expand...
Click to collapse
Sent from my SPH-D700 using XDA App
I know I read a lot and I do like everything they say but don't get the same result as they say and I use screen filter so my brightness is alwas reallly low
And idk how to use tweaks really well I found this battery tweak thing and I believe all it really does it change the mhz the phone runs on but I could b wrong
And I used supercharge v6but idk if it works I don't notice any changes.
So now I just changed to eh17 modem and removed all apps I don't use and only have a few. I froze the thingsi know waste battery and I don't have nothing thatuses the battery I think.. so is there any tweaks u know r good?
Make sure you freeze sns and drm services with a bloat freezer of mybackuppro's toolbox tht saves me like a couple percents of battery an hour. Also I have tried setcpu, voltage control, pimp my cpu, but my favorite overall is tegrak
Sent from my SPH-D700 using xda premium
xopher.hunter said:
Make sure you freeze sns and drm services with a bloat freezer of mybackuppro's toolbox tht saves me like a couple percents of battery an hour. Also I have tried setcpu, voltage control, pimp my cpu, but my favorite overall is tegrak
Sent from my SPH-D700 using xda premium
Click to expand...
Click to collapse
I have titanium backup pro and I froze the sns, system updates, drm content, and even the google maps app and I only defrost that app when I use it.
I have set cpu set on 200-1120 mhz. And I have juice defender and its set to "extreme". I don't keep any date connection on when I'm not using it. I'm not sure what else there is to do but I'm sure I've done some more things...
Sent from my SPH-D700 using XDA App
lilajrestnom said:
I have titanium backup pro and I froze the sns, system updates, drm content, and even the google maps app and I only defrost that app when I use it.
I have set cpu set on 200-1120 mhz. And I have juice defender and its set to "extreme". I don't keep any date connection on when I'm not using it. I'm not sure what else there is to do but I'm sure I've done some more things...
Sent from my SPH-D700 using XDA App
Click to expand...
Click to collapse
Buy an extended battery
LunaticWolf said:
Buy an extended battery
Click to expand...
Click to collapse
Sent from my SPH-D700 using XDA App
Don't they cost like $70???
I wouldn't use the screen off profiles. You only would need them if your trying to have your phone never go into deep sleep for some reason. Not to say the settings would cause this, but your phone should hit deep sleep after 10 or so seconds of screen off making this setting quite useless. Also if your running genocide you need to be using on demand! You can set the throttle up % in the advanced tab of setcpu. If you wanna utilize profiles what I do is set it to throttle down the cpu as my battery dies. Saing juice for those crucial lower percentages.
Cd's or tapes?
schnowdapowda said:
I wouldn't use the screen off profiles. You only would need them if your trying to have your phone never go into deep sleep for some reason. Not to say the settings would cause this, but your phone should hit deep sleep after 10 or so seconds of screen off making this setting quite useless. Also if your running genocide you need to be using on demand! You can set the throttle up % in the advanced tab of setcpu. If you wanna utilize profiles what I do is set it to throttle down the cpu as my battery dies. Saing juice for those crucial lower percentages.
Cd's or tapes?
Click to expand...
Click to collapse
Sent from my SPH-D700 using XDA App
Thanks for the advice.
But I'm have problems understanding what ur talking about exactly lol. I've never used advanced settings I don't get what they are exactly. I would understand if you don't want to explain what they are but if you did it would be really appreciated. And I'm only 17 lol I've only been rooting for about 2 months I'm glad I kno what I do know by now lol.
lilajrestnom said:
Sent from my SPH-D700 using XDA App
Don't they cost like $70???
Click to expand...
Click to collapse
There's some on ebay every now and then for $5-20
Or you could buy an extra oem batter and an external charger
Sent from my SPH-D700
lilajrestnom said:
Sent from my SPH-D700 using XDA App
Thanks for the advice.
But I'm have problems understanding what ur talking about exactly lol. I've never used advanced settings I don't get what they are exactly. I would understand if you don't want to explain what they are but if you did it would be really appreciated. And I'm only 17 lol I've only been rooting for about 2 months I'm glad I kno what I do know by now lol.
Click to expand...
Click to collapse
I'm saying don't bother with the screen off profile, first of all. Secondly don't run conservative with genocide! Its geared for ondemand (unless your trying to save your battery by not overclocking at all) and ondemand is configured by going into the advanced tab and configuring the usage percantage of your cpu to switch to the next highest frequency at a certain percentage. I use 98% and I get pretty darn good battery life. I don't know if it helps or not, but I also set powersave bias on 25. Just post if I'm still confusing you.
Cd's or tapes?
No I get it now ur talking about the up threshold right?
I flashed this battery tweak and I went to check it right not the up threshold is set to 95 I guess the tweak changed it cuz I remember checking it before and everything said -1. But thanks I get it. So if I had my phone set to 200-1200mhz and ondemand and when I have a high battery level I higher the thrshold and as I lost battery I lower it...?
Sent from my SPH-D700 using XDA App
I am a newbie on rooted phones. Just rooted the phone to CM7.0.3 Stable and found out that we have a setting to change the Govenors, currently set using SMARTASS with 245/729.
One question, is it nessesary to install apps such as Setcpu to overclock? or it is just adequet to use the setting in CM7 ? Will both conflict each other? Many thanks
Its useful I think, because you can setup CPU speeds for certain things, such as when your screen is off or when the battery drops below a certain threshold.
Sent from my HTC Wildfire using xda premium
depends on you need dude. playing games/ watching videos/ hearing music/ simple phone usage/ battery conservation etc. stock one dont have profiles. but 3rd party like set cpu have it. so that it auto switches profiles according to ur present phone status.
Sent from my HTC Wildfire using XDA App
SetCPU is much more useful than the cyanogenmod CPU functions, I did use the cyanogenmod one but I didn't see any changes
Sent by fire!
yes, the good things are the profiles! but I'm not sure if underclocking the processor really saves battery since i've heard that its just a saying/placebo
cedriccc said:
yes, the good things are the profiles! but I'm not sure if underclocking the processor really saves battery since i've heard that its just a saying/placebo
Click to expand...
Click to collapse
Yeah I think your right, strangely enough I think it's the same with overclocking, I put mine up to 700ish MHz and the battery still lasts just as long, I expected a reduction in battery life!
Sent by fire!
Notes about Battery Saver script
Can be used with kernels that have init.d support
It completely eliminates the need for an application to set CPU speeds or profiles
Easily customizable if you use a text editor(scripts located in /system/etc/init.d)
It will set Max CPU speed to 500MHz & Min CPU speed to 200MHz when a sleep
If SetCPU, Overclock Widget, Android Overclock or QuickClock Advanced Overclock are detected, the script is ignored, so it will not affect them
Preset profiles are:
1.2GHz - 100-85%
1.0GHz - 84-36%
800MHz - 35-0%
And just an FYI, even at 800MHz, the phone still operates very well & smooth but the battery saving are the real benefit
Click to expand...
Click to collapse
Does this mean that if I don't use Set CPU or any app that undervolt it, the phone will AUTOMATICALLY drop the CPU speed according to my battery level:
1.2GHz - 100-85%
1.0GHz - 84-36%
800MHz - 35-0%
Another word, it will automatically drop CPU speed to 800 MHZ when my battery level is 35-0% in order to save battery?
It won't "Drop" the CPU speed, it will lower the Maximum speed the CPU is allowed to ramp up to.
Drumrocker said:
It won't "Drop" the CPU speed, it will lower the Maximum speed the CPU is allowed to ramp up to.
Click to expand...
Click to collapse
So if I am not doing CPU intensive stuff and just play simple games, email, web surfing phone call, then I am not going to see battery improvement since my CPU probably don't ramp past 800MHZ anyway when I am just doing simple stuff.?
Calk's ROM undervolts the CPU at all speeds so that in itself should help a little with battery life. But you are correct, if you are not doing CPU intensive tasks the CPU probably isn't spending much time at the higher speeds.
There is an app called CPUSpy which shows how much time the CPU has spent in each frequency state.
Your phone will ramp up to 1200 mhz more than you think. When it loads a webpage, it will ramp up to 1200, when it's loading your "simple" game, it will max out for a bit, etc.
It might not stay there for very long, but still. The nice thing about Calkuins rom is that even at 800 mhz, the phone is super smooth and lag free. In fact I just turn setcpu down to 800 all the time.
Let me research setcpu and play around with it. Thanks again for the quick answers.
clamknuckle said:
Your phone will ramp up to 1200 mhz more than you think. When it loads a webpage, it will ramp up to 1200, when it's loading your "simple" game, it will max out for a bit, etc.
It might not stay there for very long, but still. The nice thing about Calkuins rom is that even at 800 mhz, the phone is super smooth and lag free. In fact I just turn setcpu down to 800 all the time.
Click to expand...
Click to collapse
The way Calkulin's rom scripts are setup, setcpu gets reset on every reboot, even if you have it set to boot settings. The scripts installed will still take priority and the old rules apply, just to let you know. So you would have to set setcpu every boot for it to work, that or remove the scripts.
Sent from my SPH-D710 using xda premium
Team era... Does the same idea apply to the blazer 2.0 battery saving script? or does tegrak break it?
Sent from my SPH-D710 using xda premium
I havnt opened that rom, but Im gonna say the same applies, I remove those scripts, 2 will affect the cpu state.
edit, let me clarify, the scripts take prority, even if the app makes a script for init.d, the original script will take over on a reboot. So the script breaks tegrak, setcpu, and voltage control unless you set the app on every reboot.
I am running Calks 2 and desperado kernel. I notice when using setcpu, if you have it set on boot, it will override calks script.
His script does work well on saving battery life though. I ran oc'd while at 20% and still had 1700mhz blazing on performance gov.
I'd still use Calks script over setcpu or tegrak only due to the fact im too sporatic with my phone use to create optimal profiles to fit the way and when i need to use the device.
mindgrind said:
I am running Calks 2 and desperado kernel. I notice when using setcpu, if you have it set on boot, it will override calks script.
His script does work well on saving battery life though. I ran oc'd while at 20% and still had 1700mhz blazing on performance gov.
I'd still use Calks script over setcpu or tegrak only due to the fact im too sporatic with my phone use to create optimal profiles to fit the way and when i need to use the device.
Click to expand...
Click to collapse
Actually in my own testing setcpu will not override the scripts, the slider may stay the same, but trust me, it goes back to 800 (or 1200 over 86%batt), Ive tested it several times. If you want proof Ill tell you how to figure it out. I know Im not respected yet, but I am someone that is known under another name that is highly respected, so, take it as you will.
Sent from my SPH-D710 using xda premium
Era, what's your suggestion for keeping the battery saving scripts running and getting a 1500 ish over clock when needed... something that can do both without having to physically change setcpu everytime. I basically want to permanently over clock to 1.5 and still save as much battery as possible when i have the screen off or it is charging. Idk if setcpu profiles work on this phone because i know they did not work correctly on the galaxy s. And one final question... what voltages do u run at what speeds on the "desperado" kernel to undervolt efficiently?
Sent from my SPH-D710 using xda premium
TeamERA said:
Actually in my own testing setcpu will not override the scripts, the slider may stay the same, but trust me, it goes back to 800 (or 1200 over 86%batt), Ive tested it several times. If you want proof Ill tell you how to figure it out. I know Im not respected yet, but I am someone that is known under another name that is highly respected, so, take it as you will.
Sent from my SPH-D710 using xda premium
Click to expand...
Click to collapse
ERA. I wasn't looking to say that you were wrong in any way shape or form. I would be interested to know how you seen this as I am still in the beginning phases of learning the android system. I do plan on writing my own kernal/roms but I was actually sharing what my logical thought process would have been given the apps and system info I had avail.
I have a little ways to go in understanding the structure and FS of droid. Time is everyones enemy. Thanks for the correction again!
I havnt opened that rom, but Im gonna say the same applies, I remove those scripts, 2 will affect the cpu state.
edit, let me clarify, the scripts take prority, even if the app makes a script for init.d, the original script will take over on a reboot. So the script breaks tegrak, setcpu, and voltage control unless you set the app on every reboot.
I'm currently running Calkulin's rom v2.5, and even at 41% battery I notice the cpu still hits 1.2 Ghz. Is his script activated by default or am I overlooking something? I also have nothing like setcpu installed.
Hey,
On stock kernel and firmware.
1) you have to be rooted.
2) install trickster mod from market.
3) install ds battery saver from market.
Procedure :
A) in trickster mod, set you kernel gov. To on demand and even set it on boot.
As after lots of other gov. Use I have found on demand is best matted for our zl. Leave rest unchanged.
B) in ds battery saver, switch on balance profile.
And wola, I am getting stand by time of around 3 - 4 days.
Proof have look at pix below.
Sent from my C6502 using xda premium
You know that its "estimated standby time" ? Have you experienced a run time of 3 days with your settings?
Buddy after using it for 9 days have posted, u can see the 2nd pix where it shows battery percentage and hours utilized.
Sent from my C6502 using xda premium
What's the screen-on time on the second pic?
Day 2 .
Sent from my C6502 using xda premium
thanks, seems to be working brilliantly so far
Why use DS battery saver when you can use stamina mode anyways?
Using stamina mode increases lag in your phone. And even disconnects your net services when phones in standby.
In Ds battery saver, none of this problem exist.
Sent from my C6502 using xda premium
Ds battery saver forces deep sleep when the screen is off and turns off wifi + 3g when in deep sleep.... That is very similar
Sent from my Xperia ZL using Tapatalk
Dude u can set it to wake every hour for a min... And so on....
The big issue is that in stamina mode ur kernel goes to PowerSave gov. Which slows down ur phone unlike in Ds battery u won't face the lag,
Anyways it's ur choice.
Sent from my C6502 using xda premium
I have applied your method on my phone. Will give u results in a couple of days usage. Thanks
Sent from my C6502 using xda premium
buntybauva said:
The big issue is that in stamina mode ur kernel goes to PowerSave gov. Which slows down ur phone unlike in Ds battery u won't face the lag,
Click to expand...
Click to collapse
Actually, it is not true. I am using stamina mode and my governors are as follow:
[email protected]:/sys/devices/system/cpu # cat cpu0/cpufreq/scaling_governor
ondemand
[email protected]:/sys/devices/system/cpu # cat cpu1/cpufreq/scaling_governor
interactive
[email protected]:/sys/devices/system/cpu # cat cpu2/cpufreq/scaling_governor
interactive
[email protected]:/sys/devices/system/cpu # cat cpu3/cpufreq/scaling_governor
interactive
The default settings for the ondemand governor for a multi processor setup is a big waste of battery if you set it for every processor.
They are set up to distribute most of the tasks for the cpu0 and use the least possible resources of every other CPU. Using ondemand for the other CPUs will increase the ammount of time they are turned on, wasting more battery.
cpu1, cpu2 and cpu3 are using the interactive governor, which is set up to ramp up fastly to 1026MHz, then ramping up or down slowly.
cpu0 is set up to ramp up only with 95% of processor usage, but for a multi core setup this value goes down to 80%. The logic is that when you are using more than one processor, you want the current task to end up earlier, than it is actually good to use a higher frequency. Also it means you will be happier with the high frequencies, since you will experience less lags or major slowdowns. Also, if any of the other CPUs usage goes up to 80%, the ondemand ones (in the default setup, only cpu0) will switch to a higher frequency also.
If you are going to tweak this configuration, I would recommend you to take mpdecision and the governor configuration into account. For instance, the default setup for the interactive governor on the device kernel is not suitable for the cpu0, for instance. It is optimized for heavy loads and you would get a lot more of usage around 1026MHz than you would want anyway. Either wasting battery when it should be using 384MHz or taking longer to achieve high frequencies, causing lags on the ordinary usage and some slowdowns.
work?
dj_richard05 said:
I have applied your method on my phone. Will give u results in a couple of days usage. Thanks
Sent from my C6502 using xda premium
Click to expand...
Click to collapse
this work ?
It works, basically this method improves your standby.
Sent from my C6502 using XDA Premium HD app
buntybauva said:
Hey,
On stock kernel and firmware.
1) you have to be rooted.
2) install trickster mod from market.
3) install ds battery saver from market.
Procedure :
A) in trickster mod, set you kernel gov. To on demand and even set it on boot.
As after lots of other gov. Use I have found on demand is best matted for our zl. Leave rest unchanged.
B) in ds battery saver, switch on balance profile.
And wola, I am getting stand by time of around 3 - 4 days.
Proof have look at pix below.
Sent from my C6502 using xda premium
Click to expand...
Click to collapse
When you says "in trickster mod, set you kernel gov. To on demand" you mean go to General > CPU Governor Control?
Yes... There select on demand... And save it...
Sent from my C6502 using XDA Premium HD app