yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] eric-filth:
Your welcome. And thank you.

Updated :-)

Enviado do meu Galaxy S2 usando Tapatalk
[Galaxy S II General] simone201:
Very good guide Eric! :)

Glad to see you mentioned neak tester too, have u seen the latest update? ;)

Inviato dal mio GT-I9100 usando Tapatalk
[Galaxy S II General] ram3n:
Yep, I will. cause I still prefer extreme voltage, don't you dude? :rolleyes:

Edit :

It works very well actually. No SOd or reboot.

I'm pretty impressed too :eek:
[Galaxy S II General] eric-filth:
Thanks simone for you write here. Im very glad for this. I used, thanks for listen me :-)
[Galaxy S II General] eric-filth:
I prefer tegrak ultimate because i can change internal voltages too.
[Galaxy S II General] ogk-slay:
New stable values (with Voltage Control +):

Mhz mV

1200 1150

1000 1050

800 950

500 825

200 825

How do I go about undervolting the video card? I don't see any option in Voltage Control. Do I need to use another app?
[Galaxy S II General] Lulavc:
Use ExTweaks from the same developer of Voltage Control Free.
[Galaxy S II General] ogk-slay:
Noticed it's only for Siyah...?
[Galaxy S II General] eric-filth:
Yes only siyah.

Voltage Control version .12 have gpu voltages the update .14 removed this option.
[Galaxy S II General] nachobuey:
What happends if the phone freezes after 10 seconds of power it on?

How could I change quickly or in another way this settings?

I put 100MHz at 750 mV, I think is that.

EDIT: Its OK now. Sorry
[Galaxy S II General] eric-filth:
Guys i waiting more messages about undervolt using ics to update the guide.

But for while i say. If you have found your values dont will work using ICS. I dont know why but ics need more voltage than GB.

Enviado do meu Galaxy S2 Undervolt usando Tapatalk
[Galaxy S II General] nachobuey:
I'm just trying 4.0 HyDrOG3N-ICS and Siyah3 b6 with...

i/o scheduler: vr

Governor: Lulzactive

CPU:

1200Mhz: 1175 mV

1000Mhz: 1050 mV

800Mhz: 950 mV

500Mhz: 900 mV

200Mhz: 850 mV

GPU:

Low power state: 100Mhz: 800mV

High performance state: 267Mhz: 1000mV

Any recommendation?
[Galaxy S II General] eric-filth:
Cpu undervolt is very good.

But gpu 267mhz using 1000mV is stock value. You can try undervolt starting with 925mV

Enviado do meu Galaxy S2 Undervolt usando Tapatalk
[Galaxy S II General] nachobuey:
Ok, I will try.

Could you write yours please?
[Galaxy S II General] eric-filth:
Sure.

Now on ICS using Tegrak Ultimate.

1.100mhz (1.100mV)

1.000mhz (1.075mV)

800mhz (950mV)

500mhz (925mV) before using GB was 850

200mhz (850mV) before using GB was 800

Enviado do meu Galaxy S2 Undervolt usando Tapatalk
[Galaxy S II General] nachobuey:
and GPU voltage?
[Galaxy S II General] nachobuey:
My battery life is so much better!... but I need more!

2hs of screen, 35% of battery life. I dont know why but at 50% is going down very quickly, its says active all the time and I didnt touch anything.
[Galaxy S II General] eric-filth:
267mhz - 950mV

160mhz - 850mV

Same GB

Enviado do meu Galaxy S2 Undervolt usando Tapatalk
[Galaxy S II General] eric-filth:
Guys next version of siyah kernel will suport second core app again.

With this upgrade we will can use this guide same way using ICS.

Enviado do meu Galaxy S2 Undervolt usando Tapatalk
[Galaxy S II General] galaxys2forever:
Hello..thank for guide, but some questions.

How put all the same frequencies to test a frequency? I don't understand this part!

What tool do you use to test?

And, you make test on 1 frequency and at last repeat test on all frewuency with all find voltages setted?
[Galaxy S II General] eric-filth:
Voltage Control and Tegrak Ultimate set max = min freq to test. You need set this for every frequency {200, 500, 800, 1000, 1200}

For every freq set with your undervolt need tests.

Programs to test have in first page. Like linpack, super pi, etc...

Enviado do meu Galaxy S2 Undervolt usando Tapatalk
[Galaxy S II General] brenogbi:
Hi Eric ! I'm from Brasil too... so, forgive my english..rs

what's your undervolt config now? you're using stock XXLPQ to?

hugs
[Galaxy S II General] eric-filth:
Welcome my friend.

Im using XWLP2 with siyah kernel beta7 undervolted by voltage control because tegrak ultimate 1.63 have bug with siyah.

Voltages are

200 - 1.200 mhz ( 825 - 925 - 950 - 1075 - 1150)

Enviado do meu querido Galaxy S2 usando Tapatalk
[Galaxy S II General] brenogbi:
thank u man ! how many time of screen on did u get? What s the diference between xwlp2 and xxlpq? Thanks again
[Galaxy S II General] eric-filth:
My record was using neak 1.4x + uhlb2 2.3.6 using ondemand + vr. Exactly 6h screen on.

xwlp2 is newer than xxlpq and more smooth and more performace.

Enviado do meu querido Galaxy S2 usando Tapatalk
[Galaxy S II General] losta:
can you please tell me which custom kernel is good for battery life? im quite new about undervolting ..all i know so far that it helps with the battery life..especially when its in idle mode..am i correct? i've tested most of them..but i cant really tell which one is better..

im currently using speedmod..cant leave gingerbread for now..not yet :p and im using voltage control to do the undervoltage thingy :p and cpu spy to check if my phone do the sleep mode thing....the longer the sleep mode the better battery life is....is that correct? could you please enlighten me ..many thanks in advance :)

sorry for my english :p
[Galaxy S II General] eric-filth:
For battery neak for me was better than siyah. I never checked speedmod battery life because i dont like kernel with bad performace.

Both kernels (neak and siyah) here after 10hours in deep sleep stay on 100% but you need configurate for this like remove apps what using sync. Disable options into market, disable sync with gmail, turn off 3g and wifi...

But now screen on with last neak version was better than siyah for me.

Ondemand + VR using procressor 200 - 1.100 with undervolt (signature) always 3g on with screen on = 6 hours.
[Galaxy S II General] losta:
thank you so much for the reply...i've been using siyah for quite sometime...yes it sure is one of the most popular kernel out there..almost every cusrom out there included with siyah...but recently my battery heats up quite quickly using siyah..is that normal? why i decided to change to speedmod cos the rom i'm using rite now said that its more battery friendly with speedmod and my battery decrease only by 6-7% of 8-9 hours in deep sleep mode with 3g on, all sync. but i'm gonna give neak a try :) will come again to ask for more questions if i have somethings in mind. thanks :)
[Galaxy S II General] coyote.stark666:
help!

I use checkrom V6(2.3.6) wid siyah kernel and go launcher, my fone is on 3800 mV,, i feel that this is too high,, i use my fone to play games like hero of sparta , NOVA, Dungeon hunter , temple run etc, and use dolphin browser, watch movies , listen to music,, read books etc,, soo can i undervolt? will undervolting slow down my phone or not allow me to play games , browse , click photos etc?? and if i can undervolt what free app should i install to undervolt my phone? and to what should i undevolt?,, 2000 mV?, 1500 mV?? i knw that lower the mV the lower the batt consumption, but will this compromise usability of phone, or pemanent damage??:eek::eek::eek:
[Galaxy S II General] Binaryian:
My battery is down to aprox. 50% after use from 07.00-22.00. If i'm about to do some undervolting, how much should I expect to gain from it?
[Galaxy S II General] nachobuey:
Excellent stats!!!
[Galaxy S II General] eric-filth:
voltage control is the best free app to undervolt

Damage phone? Never... Samsung only choose this default voltage for stability all galaxy s2 if your phone suport less voltage is better.

In my opinion undervolted gpu and cpu you can win about 20% battery.
[Galaxy S II General] RiGun:
Thank you friend of the north! excellent guide, I'm still finding the lowest mV to use with my phone, hopefully my battery will last longer.
[Galaxy S II General] eric-filth:
Thanks my friend.

You will see the benefic of undervolt :-)
[Galaxy S II General] JackBauerInAK:
When will this be available for CM9?
[Galaxy S II General] aceofclubs:
The whole idea of this thread is to teach us how to undervolt ourselves. Not using anyone elses settings.

You have to read up on how to do it and then do it on your device with cm9 running whatever kernel you desire that provides for UV. Siyah neak etc.

If you want a solid starting point look at feedback from others or geks magicconfig thread.

----------------------

GTI9100 XWLP3

Siyah v3.0rc1
[Galaxy S II General] dmc0105:
Thx a lot for such wonderful thread... Gonna start working on my phone now..
[Galaxy S II General] eric-filth:
Perfect what you said.

Thank you. Any question please write here.

Tapatalkado
[Galaxy S II General] eric-filth:
Updated some little but important informations about undervolt on ICS.

Tapatalkado
[Galaxy S II General] eric-filth:
Add in first page "UV for everybody" who dont want find your own undervolt
[Galaxy S II General] Konsyst:
Hey, thanks a lot for the guide! Lots of apps to test with that I didn't know about :)

But is it necessary to keep both cores on while testing if your phone usually uses hotplug?

Edit: Nevermind, I see why (: more stability testing
[Galaxy S II General] eric-filth:
Thanks my friend.

Yes i recommend you because 1core is different from other core. Each core support differents voltages. So for full stability enable two cores to set voltage and test stability
[Galaxy S II General] eric-filth:
Example:

Here with 1 core enable i use 1050mV clock 1000mhz. When i choose hot plugged or two cores enable programs crash or hangs my cellphone so i need use 1075mV to keep stability to use my phone day-a-day
[Galaxy S II General] droidluck:
thanks for this reference appreciate it! Do you also happen to have a guide

for overclocking?
[Galaxy S II General] tazer4:
Good guide I am getting much more porno time from my phone now and I achieve atleast 2-3 more orgasms, thanks!

Edit - Hey I have a problem on Super Pi I can't pass the 512k test even at stock voltage, it starts then stops without listing any iterations, I can pass the 256k test just fine. I'm passing linpack and other tests no problem when I undervolt should I be worried about the Super Pi test?

Edit 2 - Super Pi just randomly failing after a few or no iterations on 256k test at stock voltages, is this test bogus or whats going on? I'm on Siyah 3.0 kernel.

Also in linpack does it mean its failed when it shows precision as inconsistent result once in a while?
[Galaxy S II General] eric-filth:
Your welcome.

For overclock you can use the same guide because you will need change voltages.

Rise clock, rise +25mV and test until stabiliy.
[Galaxy S II General] eric-filth:
Hi porn guy hehe.

1- try clean super pi cache. Here solve this problem.

2- try again super pi 512kb and report again after you cleaned super pi cache.

3- Inconsistent is normal. Its a program issue. Run again and you see.
[Galaxy S II General] tazer4:
Thanks bro ur the undervolting boss of da boss!

After clearing the cache the 512k runs succesfully and linpack also good for 30+ tries, ran shadowgun to check a real world app and its good so I'm pretty sure I'm stable I managed to get:

CPU

200mhz-825

500mhz-925

800mhz-950

1000mhz-1050

1200mhz-1150

GPU

160mhz-900

266mhz-950
[Galaxy S II General] eric-filth:
Im very glad for your undervolt sucess. This was my intention.
[Galaxy S II General] eric-filth:
Sorry my friend but lulzactive app is not my speciality
[Galaxy S II General] victaaaa:
When I set the min and max freq to 200mhz, Voltage Control shows 500mhz when i touch the screen, then goes back to 200mhz when i dont touch the screen. Is this normal?

I'm on NEAK ics 2.0.2
[Galaxy S II General] eric-filth:
Is not normal but its is bug using ics.

But you can continue your tests that way. No problem.
[Galaxy S II General] androidfanboy93:
great effort.. it helps alot... :)
[Galaxy S II General] eric-filth:
Thanks my friend.
[Galaxy S II General] NouveauBox:
Obrigada Eric for the thread!

I had been playing with UV for a few days but am afraid to lock up my device.

Maybe I have missed it but what would I do if my device simply does not want to start up because of a too-low-value ?

Is there any way to reset voltages before booting ?
[Galaxy S II General] congo1971:
Great thread! I just see it now for the first time :)

Well done Eric!
[Galaxy S II General] luizlee86:
Are you using VC? If so, when you are still trying uv, then you should NOT save as boot settings. When you apply new voltages and don't save as boot settings, then when you reboot, voltages will be set as stock (I said VC because is the one I use, but every app should have similar option).

But even if you save as boot and the phone doesn't boot, I think you can restore voltage values through CWM... VC also has an option to put on your sd a recovery-flashable file which can be used to restore voltage values.

I'm not a specialist, but to keep playing with uv safely, you should:

1) Set voltage and apply

2) Test

3) Save profile

4) Keep testing

5) If eveything is fine, save as boot settings

I never save as boot setting since I can just go to VC and apply my saved profile which takes 5s and is safe.

ps: if you are a man, you should say obrigadO. if you a woman/girl/lady, then obrigadA is right. ;)
[Galaxy S II General] eric-filth:
voltage control and tegrak ultimate both you can not apply undervolt settings after reboot. You are safe.
[Galaxy S II General] eric-filth:
Your welcome my friend. Im glad for you reply.
[Galaxy S II General] eric-filth:
Im using VC i always save profile and not inid.d because when restart phone you have 10seconds to restore default voltage.
[Galaxy S II General] NouveauBox:
ObrigadA ... I worked in Brazil for 2 years where hardly anyone spole english so I had no choice but to learn a little of your beautiful language...

I finally figured out that when first running VC, it sets a recovery file that can be installed via CWM should something go wrong.
[Galaxy S II General] eric-filth:
De nada. Brasil is beautiful country like yours.

Save your undervolt settings by software the first choice. The second choice create init.d script and your undervolt will be started before android load. its a danger choice.
[Galaxy S II General] override182:
Agreed. Using the service in VC is actually a lot handy and safer. If an undervolt is too extreme and saved as boot as service, one can easily revoke it and re-set a more stable voltage at the failed freq
[Galaxy S II General] lionsmatara:
Wow...

One of helpful Thread In XDA :D:D

So thanks For ur brilliant Guide...:D:D

Your the man Bro eric :eek::eek::D:D

Cheers....:D:D:D:D
[Galaxy S II General] ram3n:
Just Sharing my results with my new tweaked combo : Wanam LP8 + AbyssKernel 2.2.

Take a look :

I can easily last 1hour screen on time with 89- 88% left.

AbyssPlug gov + SIO

Extreme UC UV settings.

Bloatware freezed.

My Extreme UV : 800-825-850-900-925-950-975 mV (Not every CPU will support it :P )

Best battery life with really nice performance ever.

Be happy, be simply :D

My two cents.
[Galaxy S II General] eric-filth:
Very thanks.

Ow my god.

You disabled second core?

Here always 20% ~ 1h screen on

200 - 1200 mhz ?
[Galaxy S II General] ram3n:
Disabled second core ? What for ? Absolutely not :p

Has just UC 200 - 800 mhz + different tweaks.

No lag, ultra smoothing in general, even with huge 3D games, scrolling similar to LA4 2.3.6 with better battery. What else ? :D
[Galaxy S II General] eric-filth:
200 - 800 mhz maybe this option can do that.

I always use 200 - 1.200mhz
[Galaxy S II General] ram3n:
Morning guys,

I wanna share with you my first fresh results with my lovely duo:

AbyssKernel 2.3 + latest Wanam + tweaks

* UC: 200-800 mhz

* Extreme CPU UV settings (- 100mv for each step) : warning! your S2 maybe freeze!

* My best combo : Sio + AbyssPlug

* 50%Google + 95%Sammy Bloatwares freezed or removed.

* Battery well calibrated (look at my signature to test my best method)

* LP6 modem (++)

* Using my brain.

Just browsing with Tapatalking and market while one hour.

I think I couldn't get better.

My goal has now been achieved with best experience possible IMHO: performance, smoothing, autonomy at the same time.

I'm finally a happy S2' Android Boy

Just wanna thanks my friends Wanam and Angelom for their awesome works.

Cheers guys and have a nice day ;)

Ps : no fake, no troll, no rage please. Peace and love.

Sent via my s2 monster

Sent via my s2 monster
[Galaxy S II General] enekho:
Thanks for the thread, I'm going to start in the world of undervolting, and thanks to this now I have some ideas clear. Hope I get some awesome results to share with you!
[Galaxy S II General] bouighil:
With SetCpu or another app?
[Galaxy S II General] ram3n:
No, just using Voltage Control. But, you can choose the app you want. :)
[Galaxy S II General] bouighil:
Merci chef
[Galaxy S II General] Skrilow:
Thanks ! Very good guide for the noob (like me :D) in UV.

I started to put -50 mV for each steps,and for the moment,no freeze :D Hope it will continue like this :)

PS : Sorry for my bad english,but i'm 15 years old (and I'm french :p )
[Galaxy S II General] rodxxda:
Ohm´s law

Nice guide but you just forgot to explain the real thing behind "undervolting"

It is the Ohm´s law...If you have fixed resistence and you apply a lower voltage than usual, you certainly will have less current thru the circuit, resulting in this case, less battery consuption..that is all there is to it.

I=V/R

Google it.

But remember lowering the voltage in a given digital circuit, you lower the edge of every cycle and it will eventually cause trouble, like lock ups, etc...

The opposite applies when "overclocking". If you increase a circuit frequency it is likely to have lower cycle edges, resulting in bad things...then what you do to try to fix it? Raise the voltage! Then what happens? Increase of current and heat!

That is it!
[Galaxy S II General] ram3n:
Omg guys,

This is just amazing. Take a look.

Using latest Wanam + Abyss kernel + some tweaks.

SIO + Abyssplug

200-800mhz

Extreme UV settings.

No fake. Just browsing and tapatalking while 2 hours...

PS : did you notice too that only screen and sleep stats are only showned? Not even OS Android %... Strange isn't it?

This is making my day.

Just sharing with you.

Cheers

Sent via my S2 monster
[Galaxy S II General] eric-filth:
You welcome my friend. I made this guide for everyone im glad for help you.

Thanks for you knowlodges.

But i never saw one guy need raise the stock voltage to work. So i cant see any problem.

Thanks for you sharing. Is make this topic better. Continue with your posts.

Enviado do meu GT-I9100
[Galaxy S II General] ram3n:
you're welcome matey.

Here are my latest screenshots.

I'm using 2000mha Battery with :

Wanam LP9 + Latest AbyssKernel 2.8 = my best combo ever

Duo : AbyssPlug + SIO

UC : 200 - 800 mHz

Extreme CPU and GPU UV values.

Some tweaks for both performance and battery.

This is what I called Perfection.

If I discharge until 1%, no doubt that I can easily last 8h30 and more about screen on time.

I have managed to finally get my best dreaming combo !

have a nice day ! :)
[Galaxy S II General] rodxxda:
I was just giving an simple explanation for those who does not know better, how basic electronics apply in cases like that.

Thanks
[Galaxy S II General] eric-filth:
Maybe 10h screen on? Hehehe

Enviado do meu GalaxyS2 usando Tapatalk 2.1
[Galaxy S II General] eric-filth:
Guys Tegrak Ultimate is back.

Now working again with Speedmod K3-19, Neak 2.0.5x and Siyah 3.2.5.1
[Galaxy S II General] RiceDie:
Hey guys the Siyah kernel will allow you to drop down to 25Mhz for more undervolting
[Galaxy S II General] randomseasons:
Guy, can u swear to God this is real ? Over 6 hours' screen on is amazing, while u got 8 hours, it's simply unbelievable x_x
[Galaxy S II General] :
Eric, are you using 18 steps? I could use a little help undervolting all they...
[Galaxy S II General] eric-filth:
I dont like 18 steps. Because cpu governors dont use all steps only the basic.

But i can tell you my uv for "anothers" steps

Enviado de meu GT-I9100 usando o Tapatalk 2
[Galaxy S II General] :
I don't like 18 steps too. But as I'm using fluxi, I only have 18 steps :) I'm using the voltage set from Siyah -50mV for each.
[Galaxy S II General] eric-filth:
Guys later i will update the topic with new settings/apps to undervolt our GalaxyS3 too

Enviado pelo meus dedos
[Galaxy S II General] :
Make for Nexus too, I heard you love the Nexus. ;)
[Galaxy S II General] fylim:
Can you share how to configure int vol for S3 using init.d script?
[Galaxy S II General] :
I think it's not possible.
[Galaxy S II General] wackyD:
Great write-up mate - thanks for educating! I'm going to try some of the things you have suggested.
[Galaxy S II General] eric-filth:
Hi Marcello.

Its possible with Neak Kernel.

Here my settings.

#!/system/bin/sh

echo "850 850 800 800 750 725 725" > /sys/devices/system/cpu/cpu0/cpufreq/int_mV_table
[Galaxy S II General] Wave3.3:
Undervolt working on i9100 stock JB, stock kernel, only root?

With tegrak overclock, loading "overclock module" work and i have the possibility to change the voltage..

It is dangerous if i try?

Thanks..
[Galaxy S II General] MistahBungle:
Root only, obviously.

Undervolting is not 'dangerous' at all, on the contrary, it's a bit kinder to your CPU than overvolting/overclocking. The worst thing that can happen is instability because the CPU can't handle that level of undervolting. You need to test (25/50mV) a bit a time.

If you overclock/overvolt the CPU a lot/for long enough, you will reduce its useful life, but as most people don't keep phones much longer than 2yrs or so, this won't affect most people. You'd need to do it constantly for 3-5 yrs & there's a fair chance something else on the phone would fail before the CPU did.

Read the stuff about under/overvolting & clocking on here/do your research & take it slowly & test to see what works with your CPU; they all come out of the factory a bit different.
[Galaxy S I9000 Q&A, Help & Troubleshooting] scheinheilig:
Hi,

i tried to Softlink the SD-Card on my CM9 (Alpha 16).

SD-Card is mounted as /mnt/emmc

I tried to link on terminal emulation as root (su root)

ln -s /mnt/emmc /mnt/sdcard/external_sd

Does not Work and says "permission denied"

Anyone knows why?

Thx,

scheinheilig
[Galaxy S I9000 Q&A, Help & Troubleshooting] snapper.fishes:
Have you tried getting super user permission?

Knowledge is Power. Guard it well.
[Galaxy S I9000 Q&A, Help & Troubleshooting] cdmackay:
The sdcard is a FAT filesystem isn't it? Don't think that supports symlinks?
[Kindle Fire General] photobillyli:
I have tried CM7 but it is not very smooth.

Is there any rom better?

For ICS rom, I have tried the Hashcode Zone one but after flashed the rom, my fire just stuck at the booting animation......so I have only flashed CM7 right now.
[Kindle Fire General] daggy1985:
Personally I love running whistletop's cm7, it runs super smooth for me, and most importantly HW acceleration works as well as all video (flash, HD YouTUbe), which you currently loose with CM9 until the devs get HW acceleration working. Until then, I'm sticking with CM7.
[Kindle Fire General] _ante_:
I've been running Whistlestop's CM7 since late January and it's been great-- no wifi issues, SOD, etc. I'm holding out for hardware video acceleration (and hopefully USB OTG) before I move on to ICS.
[Kindle Fire General] naetarf:
ICS CM9 Kang ROM Themed recommendation

Since yesterday I am using the ICS CM9 Kang ROM Themed. Before I was using the CM7 barebones. The ICS CM9 Kang ROM is fantastic. It is extremly fast and responsive. The Hardware UI acceleration is not working yet for HD and some times the system frizes. But I can only recommend the use!!:)
[Kindle Fire General] ammubarak:
Try this ics ROM at this link:

http://xdaforums.com/showthread.php?p=20700175
[Kindle Fire General] airmaxx23:
To me CM7 is the best ROM since everything works. The build in THIS post seems to be slightly better than the other CM7 builds that I've tried.