Right now my rom and kernel is stable but would like to have a little more battery life and consider undervolting a little.
Just wondering whether the gains of soft undervolting (-25 / -50 / -75 across all steps) are visible in terms of increased battery lives for our GS2. Anyone did any test/comparison to determine if your battery life is better/ overall temp of device is lower?
Thanks in advance!
Get Gsam battery monitor from playstore and under volt -25 and test for 2 days aleast for freezes and sods. Then drop to -50 and so on. Some phone wont drop by -25 without sods. Also setting cpu to 1000mhz Saves battery not having to jump to 1200.
In my experience, some increase in battery life. I guess it depends on what kind of user you are. If you really chew through battery & find yourself reaching for a charger/spare battery halfway through the day, it might be significant/make a real difference to you. If you're someone who charges their phone overnight/uses the phone relatively 'normally', you probably wouldn't notice any great difference, and it might not be worth your while going through the time/hassle of working out exactly how much undervolting your CPU can handle.
Well, I've read some threads on undervolting and I think having a scaling stability test using the StabilityTest app could save quite a lot of hassle to do testing for cases of freezes and SOD. That was what got me thinking about doing some undervolting but not too aggressive to the point that I'm bordering on unstability, thus this thread! :cyclops:
Ok then max Uv -50 just test that -75 prob wont work anyway without problems
andrewwright said:
Ok then max Uv -50 just test that -75 prob wont work anyway without problems
Click to expand...
Click to collapse
Just wondering if -25 will have any effect at all. Hmm.
Anyway @andrewwright you mentioned something about Gsam battery monitor, it seems to do the same as betterbatterystats. I have BBS, so that's enough right?
. Its up to you what battery monitor you use :thumbup:. With -25 shouldn't be a problem. Each phone is different. Mine is group 1 which is a bad group to have but I can and am Uv by -50. And all ok
andrewwright said:
. Its up to you what battery monitor you use :thumbup:. With -25 shouldn't be a problem. Each phone is different. Mine is group 1 which is a bad group to have but I can and am Uv by -50. And all ok
Click to expand...
Click to collapse
Haha yeah just checking to make sure its not some special app that does something else special :good:
Well, but -25 probably won't make much of a difference right? I have group 3.
iamatechnoob said:
Haha yeah just checking to make sure its not some special app that does something else special :good:
Well, but -25 probably won't make much of a difference right? I have group 3.
Click to expand...
Click to collapse
Have a go and see.
Will do right after I do a nandroid
Thanks for the help anyway!
iamatechnoob said:
Will do right after I do a nandroid
Thanks for the help anyway!
Click to expand...
Click to collapse
Just check the link below to gain some info on OC/UV before proceeding ma8
http://forum.xda-developers.com/showpost.php?p=34153152&postcount=15576
Sun90 said:
Just check the link below to gain some info on OC/UV before proceeding ma8
http://forum.xda-developers.com/showpost.php?p=34153152&postcount=15576
Click to expand...
Click to collapse
Read that before, twice!
Sun90 said:
Just check the link below to gain some info on OC/UV before proceeding ma8
http://forum.xda-developers.com/showpost.php?p=34153152&postcount=15576
Click to expand...
Click to collapse
So undervolting is useless.Display takes much power so decreasing brightness is the only way to save maximum juice.
umair42 said:
So undervolting is useless.Display takes much power so decreasing brightness is the only way to save maximum juice.
Click to expand...
Click to collapse
well, its not that 'Undervolting' is useless, but while doing so u have to take some risk, which IMO do always bring about bad results (rather than saving some Juice on ur batt, it might cause instability most of the time ).
So it would be better, the same is left to devloper's of Kernel's since they know what they r doing
This is why I have said little steps first.
I'm not going to say I'm right when a Rc is here saying don't do it but there are risks in pretty much every thing on xda.
andrewwright said:
I'm not going to say I'm right when a Rc is here saying don't do it but there are risks in pretty much every thing on xda.
Click to expand...
Click to collapse
Pretty damn right you are, I guess that's how xdadevelopers came to rise isn't it? :victory:
But well to each his/her own, there seems to be a healthy bunch of people on this forum that loves their undervolting but yes I agree that to tech noobs like me, maybe we shouldn't mess around so much unless we know for sure what we're doing haha
Thanks for the help everyone! Appreciate it!
Related
Now that the X10 is rooted, anyone install SetCPU yet. And if so is it fully functional?
Yeah, it's working fine for me.
Fuzalert2k said:
Yeah, it's working fine for me.
Click to expand...
Click to collapse
And you can change ur signature now
Fuzalert2k said:
Yeah, it's working fine for me.
Click to expand...
Click to collapse
Ok, good, I'll buy it now and get back to yaz...
Fuzalert2k said:
Yeah, it's working fine for me.
Click to expand...
Click to collapse
Oh... did you manage to overclock, if so, what was the highest stable overclock?
RodneyBR said:
Ok, good, I'll buy it now and get back to yaz...
Click to expand...
Click to collapse
No dude, don't buy it! it's free for XDA users.
RodneyBR said:
Oh... did you manage to overclock, if so, what was the highest stable overclock?
Click to expand...
Click to collapse
No, it won't let me go higher than 993 mhz
if decrease the clock speed to the max of 600mhz,will it save more power?
yeah tried as well and the max is 993mhz. weird
(unless i'm missing something, I never used setcpu before)
I use OverclockWidget for my wife's X10.
Off screen frequency : 250~384
On screen frequence : 576~1000Mhz
it work like charm !
but your not going over 1000mhz? not overclocking
Mod. edit: not dev related, moved to general
Fuzalert2k said:
No dude, don't buy it! it's free for XDA users.
Click to expand...
Click to collapse
It's free, really. How does that work?
czw2002cn said:
if decrease the clock speed to the max of 600mhz,will it save more power?
Click to expand...
Click to collapse
Well, I just leave it set to "ondemand", so that way it will automatically adjust the speed as needed (Max: 998MHz, Min: 245MHz). My max is 998MHz.
what firmware we can use? which is highly recommended? R2BA026?
SetCpu and more, can we use Juice defender to increase autonomy
RodneyBR said:
Well, I just leave it set to "ondemand", so that way it will automatically adjust the speed as needed (Max: 998MHz, Min: 245MHz). My max is 998MHz.
Click to expand...
Click to collapse
you know the phone does that anyway right?
I don't speak French so I can't comment on that but I've been using SetCPU since the 020 root and it SEEMS to work alright. Sometimes when I open it, it says something about failing but then it works OK.
I'm currently on R2BA026 rooted and it works for me. I also use JuiceDefender but to be honest I'm getting more and more convinced that's not helping any more. JuicePlotter in particular is struggling and keeps stalling, with gaps in the graph frequently, not sure why but that's not relevant to this thread so I'll leave that.
But I do NOT use it to overclock and would not recommend that! For a start, it would cane the battery. Rather, I use it to "throttle" the CPU speed. I think that's what most of us use it for. E.g. when the screen is off, it stops the CPU working too hard (and thus saves battery). Also when power is running low, CPU is throttled to save it. By throttled I mean "restricted to 245Mhz".
It's free to XDA members because the dev kindly put it up here somewhere for download - if you're looking for "how that works" on the Market, stop now because that's not how it works! The Market doesn't give you a discount for being on XDA.
Just search for it on here, or wait for someone who has used it to point you in the right direction. I'd search for it for you but I'm about to head out.
Ungruntled said:
I don't speak French so I can't comment on that but I've been using SetCPU since the 020 root and it SEEMS to work alright. Sometimes when I open it, it says something about failing but then it works OK.
I'm currently on R2BA026 rooted and it works for me. I also use JuiceDefender but to be honest I'm getting more and more convinced that's not helping any more. JuicePlotter in particular is struggling and keeps stalling, with gaps in the graph frequently, not sure why but that's not relevant to this thread so I'll leave that.
But I do NOT use it to overclock and would not recommend that! For a start, it would cane the battery. Rather, I use it to "throttle" the CPU speed. I think that's what most of us use it for. E.g. when the screen is off, it stops the CPU working too hard (and thus saves battery). Also when power is running low, CPU is throttled to save it. By throttled I mean "restricted to 245Mhz".
It's free to XDA members because the dev kindly put it up here somewhere for download - if you're looking for "how that works" on the Market, stop now because that's not how it works! The Market doesn't give you a discount for being on XDA.
Just search for it on here, or wait for someone who has used it to point you in the right direction. I'd search for it for you but I'm about to head out.
Click to expand...
Click to collapse
we cant overclock anyway until there is a custom kernel. and you get bet your arse that when there is one, ill be overclocking to the max zoooom
I've used SetCPU for a few weeks and now I've been using my X10 without SetCPU for a few weeks and I've noticed zero difference in power consumption.
I'm guessing Android does a fine job itself at downclocking the CPU when it doesn't have to do heavy tasks.
Cinner said:
I've used SetCPU for a few weeks and now I've been using my X10 without SetCPU for a few weeks and I've noticed zero difference in power consumption.
I'm guessing Android does a fine job itself at downclocking the CPU when it doesn't have to do heavy tasks.
Click to expand...
Click to collapse
Same here. i just uninstalled it and my phone is also more stable.
Hey guys, anyone have a good idea of what some safe undervolting values would be? I was just going to play around with them and not set it on reboot so I could just pull the battery, but I am unsure of how irreversible the damage could possibly be, if any.
I am running: Senseless 1.0
dsb's kernel
I actually have it underclocked slightly because I don't play games, and when I do they are something like Angry Birds, or Words when I am bored.
Bump, out of all of you who have undervolted none of you know any good values?
AtLemacks said:
Bump, out of all of you who have undervolted none of you know any good values?
Click to expand...
Click to collapse
Well, since no one will answer, I will
I generally only keep it undervolted -50mV across the board. That's just my usual set up to get a tiny bit more from the battery. The furthest I've gone is -200mV at the top. I didn't keep it like that for long, but everything seemed to run smoothly still. I'm sure I could go much lower, but I'm kind of afraid to until I know more about it.
I'm just starting to work on undervolting today since I found a kernel that works really well. I'll let you know what my phone is stable at.
WasabiWa83 said:
Well, since no one will answer, I will
I generally only keep it undervolted -50mV across the board. That's just my usual set up to get a tiny bit more from the battery. The furthest I've gone is -200mV at the top. I didn't keep it like that for long, but everything seemed to run smoothly still. I'm sure I could go much lower, but I'm kind of afraid to until I know more about it.
Click to expand...
Click to collapse
Cool, I didn't know what was "too much". How much better battery life did you see from -50?
Evo4gLI said:
I'm just starting to work on undervolting today since I found a kernel that works really well. I'll let you know what my phone is stable at.
Click to expand...
Click to collapse
Which Kernel are you running?
At -50mV across all frequencies, it reeeally varies. I never have a "normal" day with this phone. But, the shortest I've had using Ziggy's kernel from 192-1836gHz with on demand governor is around 7 hours. That was pretty heavy usage for me. Some games like Dead Space and Captain America, tons of internet, Pulse, texting, a few phone calls, music, and a little Netflix at night. The longest I've had has been 20+ hours. That's with very little gaming, a little internet, and mostly just texting. Stock battery, bump charged.
I'm really afraid to go too low, though. One time I was just seeing what would happen if I kept lowering it across all of the frequencies and it froze, then crashed. Had to battery pull to get it to work again.
I run DSB Kernel with SmartAssV2 underclocked to 1296, and before undervolting on my OEM battery I got 13 hours with a little over normal usage. Screen was on for about 2 hours total. On my extended battery I got like 27 1/2 hours, but obviously some of that time was overnight.
2 hours later I am still above 90% this is what I like to see! If I can get 15 hours on OEM battery, my extended battery will stay in my truck as my backup!
AtLemacks said:
2 hours later I am still above 90% this is what I like to see! If I can get 15 hours on OEM battery, my extended battery will stay in my truck as my backup!
Click to expand...
Click to collapse
Might mess with this, I am running same kernel same governor. How much did you undervolt in the end? I was gonna push-100 on each and see how it goes...
Sent from my ADR6425LVW using XDA App
I went -50 across the board, using dsb kernel, underclocked to 1028, and everything is stable.
Sent from my HTC Rezound via Tapatalk
nosympathy said:
Might mess with this, I am running same kernel same governor. How much did you undervolt in the end? I was gonna push-100 on each and see how it goes...
Sent from my ADR6425LVW using XDA App
Click to expand...
Click to collapse
Just -50, but I updated the kernel and forgot to remove the PH98IMG prior so I set the phone into bootloops. Had to factory reset(after trying everything else) and start over from backups.
Evo4gLI said:
I went -50 across the board, using dsb kernel, underclocked to 1028, and everything is stable.
Sent from my HTC Rezound via Tapatalk
Click to expand...
Click to collapse
See, I don't get the overclocking hype. It isn't hard to overclock when needed, so I feel underclocking is the better choice for battery life. The phone is fast as hell no matter what.
I may try to do some undervolting...but I am running clean rom 1.3 and dsb's smartass kernel, and I have been getting good battery life for what I use my phone for. I do have it overclocked though (on demand).
You won't damage the phone with undervolting. I mean a lockup might be a pain, but it won't damage the phone. Overvolting on the other hand could ruin the phone.
I will probably just stick with -50 across the board for now, I am tempted to pay for the full version just so I can save profiles and not have to set on boot.
Late reply but running AOKP w/ frAnco I UV -100 with no issues at all.
Running -75 on everything with incredikernel
bendirkss said:
Late reply but running AOKP w/ frAnco I UV -100 with no issues at all.
Click to expand...
Click to collapse
You sir must be using a Gnex. LOL
So far I've just been using SetCPU for over/underclocking but have never messed with undervolting. I was wondering what most people use if your main priority is undervolting for better battery life. I'm running Siyah 2.6.7 with SHOstock ROM. Any help/feedback is appreciated.
mpkothari said:
So far I've just been using SetCPU for over/underclocking but have never messed with undervolting. I was wondering what most people use if your main priority is undervolting for better battery life. I'm running Siyah 2.6.7 with SHOstock ROM. Any help/feedback is appreciated.
Click to expand...
Click to collapse
Well, undervolting is very tricky. Each CPU differs in its ability to undervolt, so settings that work for one may not work for others. You'd have to do some testing. I recommend either a.) undervolting one tick and run AnTuTu benchmark multiple times as well as a demanding game/app (Run them for a long time), or b.) undervolting one tick and using your phone normally as per your current usage and if by the next morning it's still running as normal, repeat one tick.
Do NOT set "Set on Boot" to on until you've run these tests and have had no issues.
Hope this helps a little.
Do not worry about 1400,1600 mhz till later since that's when your overclocking.
Bump everything else down by 25mv, run the stress test and a few intensive programs like benchmarks/games.
Keep doing that till you start to notice problems and then revert to the best setting you had. (make sure to backup or not set on boot)
Once you go through all that then you can do it for individual mhz and see which can still be lowered.
This should keep you busy for a hour or so.
I'll share what I posted in another thread. Doing stress tests are fine, but if you test throughout the course of a day or more, you have the opportunity to come across situations you might not think of during testing.
Simba501 said:
Ouch....I think the best way to experiment with undervolting is to use Voltage Control. Save the stock settings as your boot settings (it saves everything - governor, frequencies, etc; so, make sure those are what you want them to be as well), then undervolt (at the beginning of the day). If you make it to the end of the day with typical usage, you can save those as your new boot settings. Undervolt further at the beginning of another day, etc. Once you make it to the point where you get locked up, voltage control will set the previous values at boot and you'll know that those are your limits.
EDIT: If you want to play it extra safe, run values for more than one day.
Click to expand...
Click to collapse
I'm at work right now trying not to get easily distracted by xda since I keep checking whether or not an ICS leak has been ported or something. Thanks guys for your much appreciated input. I've been running with all voltage values knocked down by 50mV with the exception of 1.4 and 1.6 GHz. Those I kept stock since I'm not overclocking. So far so good actually with sio/ondemand and Max 500 Mhz. It's surprisingly smooth and battery of course is doing exceptionally well at these settings. Switched over to voltage control for now.
Sent from my SAMSUNG-SGH-I777 using xda premium
I personally have become very fond of voltage control where as I'd previously been using set-cpu for nearly ever since the H1 and mytouch days. Voltage controls just allows more freedom and tweakability.
Alucardis666 said:
I personally have become very fond of voltage control where as I'd previously been using set-cpu for nearly ever since the H1 and mytouch days. Voltage controls just allows more freedom and tweakability.
Click to expand...
Click to collapse
Right there with you. just "converted" to Voltage Control. (thanks Simba!)
K Rich said:
Right there with you. just "converted" to Voltage Control. (thanks Simba!)
Click to expand...
Click to collapse
Heh, glad I'm not the only defector
Simba501 said:
I'll share what I posted in another thread. Doing stress tests are fine, but if you test throughout the course of a day or more, you have the opportunity to come across situations you might not think of during testing.
Click to expand...
Click to collapse
That's the post I was thinking of, I just honestly couldn't figure out where I saw it or who wrote it.
Hey. I have an int'l GS3 with the Siyah Kernel on an AOSP ROM. I'm a heavy user sso the battery is insufficient for me. So I need to undervolt. A friend of mine told me there are certain risks involved in it, including bricking the phone. But I am in desperate need so I need to know what all I need to do and the precautions I need to take to undervolt. And also, in case I brick during undervolt, what do I do? How do I set the standard values using CWM?
Also does undervolt affect CPU performance?
Thanks for your time.
Buy a spare battery
jje
JJEgan said:
Buy a spare battery
jje
Click to expand...
Click to collapse
Low on cash.
There's no risk other than crashing your phone due to too low voltage. You can't brick it like that. It also doesn't affect performance.
AndreiLux said:
There's no risk other than crashing your phone due to too low voltage. You can't brick it like that. It also doesn't affect performance.
Click to expand...
Click to collapse
So which value should I use? Siyah gives me four options: - 25mV, - 50mV, - 75mV and - 100mV
And also, does it affect CPU performance?
Yes UV affects performance, it is used to find stability not save battery life. It is too low of a mV to actually save battery. If you find the right spot you can OC more and have better stability.
**I need to spell check things before i post CD
Sent from my GT-I9300 using xda premium
if you have siyah, make sure you download the revert script, then if you uv and crash in recovery you just flash that and it revert all values back to original
Is it so hard to google that?
When I google "What is undnervolting?" i can see at least 5 Threads about Undervolting here at XDA.
Damn, WHY YOU CAN'T GOOGLE IT ????
OR USE THE SEARCH
slaphead20 said:
if you have siyah, make sure you download the revert script, then if you uv and crash in recovery you just flash that and it revert all values back to original
Click to expand...
Click to collapse
Where do I get the revert script from? I didn't see one in Siyah's thread. (Link highly appreciated)
dfMails said:
Is it so hard to google that?
When I google "What is undnervolting?" i can see at least 5 Threads about Undervolting here at XDA.
Damn, WHY YOU CAN'T GOOGLE IT ????
OR USE THE SEARCH
Click to expand...
Click to collapse
Because my situation seems to be unique!
I didn't get stuff that slaphead20 just told me on Google search. So if you're no moderator or administrator, you'd better keep your suggestions to yourself.
Here....read
http://forum.xda-developers.com/showthread.php?p=27385844
[KERNEL][STweaks][Eargasm][exfat][NTFS][Sammy&CM10] SiyahKernel S3 v1.5beta4
Still don't get it man. My question is what do I do if phone doesn't boot up after applying undervolt in STweaks? And does it affect performance?
Flash a different kernel via cwm, via odin, flash the stweaks revert script etc.
There are numerous ways of sorting it out. It won't brick it and no, it doesn't affect performance, at least not negatively, it may give you better benchmark scores due to reduced heat and therefore not being throttled.
To put it simply, just do it, start at -25 then -50 and so on.
And that's the third time you have asked of it affects performance and andreilux already answered you in the 3rd or 4th post.
Noobs, they just don't read.
Sent from my GT-I9300 using xda premium
Hello
I'm using the Ultima rom and I need help undervolting. In Stweaks there are only sliders per frequency but on stock with Siyah kernel, there was a drop down list with -25 and -50 on it.
I don't know how to edit using the sliders. How can I get the drop down list back?
SuperAce609 said:
Hello
I'm using the Ultima rom and I need help undervolting. In Stweaks there are only sliders per frequency but on stock with Siyah kernel, there was a drop down list with -25 and -50 on it.
I don't know how to edit using the sliders. How can I get the drop down list back?
Click to expand...
Click to collapse
check for boeffla kernel it has drop down list but make sure it works for ur Rom or ull screw it up
No offense but if you can't figure out a slider, perhaps you shouldn't be undervolting.
Besides, most devs don't believe it saves battery anyway. After stopping undervolting recently myself, I'm inclined to agree
Sent from my GT-I9300 using Tapatalk 2
rootSU said:
No offense but if you can't figure out a slider, perhaps you shouldn't be undervolting.
Besides, most devs don't believe it saves battery anyway. After stopping undervolting recently myself, I'm inclined to agree
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
Nah, I finally learned how to do it using System Tuner. I was confused because when I moved the slider a bit, all the numbers changed and I couldn't figure out where the -25 was gonna be at. But I got it now.
Are you sure it doesn't attribute to battery life? I went a whole -100mV in general and for me it seems to have improved a bit. Not by much but it is noticeable.
Anything else you recommend? I'm completely new to the device, but I familiarize with tweaking very quickly.
SuperAce609 said:
Nah, I finally learned how to do it using System Tuner. I was confused because when I moved the slider a bit, all the numbers changed and I couldn't figure out where the -25 was gonna be at. But I got it now.
Are you sure it doesn't attribute to battery life? I went a whole -100mV in general and for me it seems to have improved a bit. Not by much but it is noticeable.
Anything else you recommend? I'm completely new to the device, but I familiarize with tweaking very quickly.
Click to expand...
Click to collapse
I've been undervolting for about 3 years but I have noticed no effects by ceasing this activity. I have noticed improved stability though. I actually notice more effects by tweaking things like CPU sample times etc
I use SetCPU
rootSU said:
I've been undervolting for about 3 years but I have noticed no effects by ceasing this activity. I have noticed improved stability though. I actually notice more effects by tweaking things like CPU sample times etc
I use SetCPU
Click to expand...
Click to collapse
You mean better stability after or during the undervolting? And what's your stand on OC? Do you also think UC saves battery as well?
Lol sorry, I just like asking people that know about these things before I try messing with them.
Yeah its more stable at stock voltages.
I recently stopped overclocking. I don't have any particular reason not to overclock. I was troubleshooting an issue and overclocking and undervolting should be the first to go when doing this. Just didn't have a need to re-overclock.
One thing I would say though... if you're overclocking, don't add more voltage than 1400 MHz is set as stock... that adds heat. Heat + clock = damage
Sent from my GT-I9300 using Tapatalk 2
rootSU said:
Yeah its more stable at stock voltages.
I recently stopped overclocking. I don't have any particular reason not to overclock. I was troubleshooting an issue and overclocking and undervolting should be the first to go when doing this. Just didn't have a need to re-overclock.
One thing I would say though... if you're overclocking, don't add more voltage than 1400 MHz is set as stock... that adds heat. Heat + clock = damage
Sent from my GT-I9300 using Tapatalk 2
Click to expand...
Click to collapse
I see. Thank you very much for all this.
But I ran into a problem. Screen flickering. When the screen is off and I press the home button, a bright flash appears then the lock screen turns on. That's the only problem I've been having and it's scaring me like crazy. I've seen some flickering issues but none like this one. Do you think it has to do with the volting? I've restored normal voltages and hasn't happened so far. It's happened twice since last night and today. Both after undervoltage. I hope that was the cause.
SuperAce609 said:
I see. Thank you very much for all this.
But I ran into a problem. Screen flickering. When the screen is off and I press the home button, a bright flash appears then the lock screen turns on. That's the only problem I've been having and it's scaring me like crazy. I've seen some flickering issues but none like this one. Do you think it has to do with the volting? I've restored normal voltages and hasn't happened so far. It's happened twice since last night and today. Both after undervoltage. I hope that was the cause.
Click to expand...
Click to collapse
I dont know tbh...
rootSU said:
I dont know tbh...
Click to expand...
Click to collapse
No, it doesn't have anything to do with undervolting. It just happened again. I really can't tell what it is.