yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] Firschi:
In the past few weeks i tested stock, cf-root, siyah and speedmod kernels looking mainly at battery life. Reading this thread I decided to give Phenomenal a try. I'm running WanamLite V12.3.

Is there any reason besides the relatively slow development, that the fluxi kernel isn't mentioned at all?
[Galaxy S II General] It_ler:
I like to stay on stock ROM, and Fluxi kernel is for AOKP/AOSP ROMs only.
[Galaxy S II General] Firschi:
hm, good point :) I didn't realize that, excuse me, please.
[Galaxy S II General] It_ler:
SiyahKernel v4.1rc1:

I just flashed SiyahKernel v4.1rc1 on my stock XWLPT ROM.

Everything seems to work so far (camera, bluetooth, wifi, GPS, fm radio, recovery, etc.).

It is very stable and smooth on my phone.

Now doing some benchmarks.
[Galaxy S II General] bluefa1con:
After using aosp for a year I am trying lpt with siyah and Its so stable and battery friendly

i might cook myself a custom rom soon if i get time
[Galaxy S II General] gamal001:
Waiting your rom
[Galaxy S II General] bluefa1con:
i have been working with aosp for some time now but havnt touched smali or worked with a samsung rom

will see if i can provide some thing good to the community or not release it all because i dont want to publish just another rom
[Galaxy S II General] It_ler:
SiyahKernel v4.1rc1:

Added its benchmark results to first post.

Nothing special about it.

Now let's examine its battery life.
[Galaxy S II General] It_ler:
SiyahKernel v4.1rc1:

Its deep sleep and battery life in night use is very good.

Siyah v4.1rc1: Battery loss of 0,75% per hour, Awake: 4,4%, Deep sleep: 95%

Best result for SiyahKernel I've ever had so far.

I am curious about its battery life in mixed usage now.
[Galaxy S II General] bluefa1con:
siyah 4.1 beta 5 (the new gpu stages)

1day 10 hour time

3hourse 3 mins screen time

wifi, screen on low brightness

9% battery remaining

this is the third best battery life i ever had on ics

the best i ever had was on my self compiled rootbox ICS
[Galaxy S II General] Addicted2Speed:
My GS2 with the new N.E.A.K 2.1.2x, in deep sleep "eats" 0,28% battery per hour ;) ... the best deep sleep i'v ever had :D

Bu give it a try a let us know :good:
[Galaxy S II General] It_ler:
Yes, latest N.E.A.K. is already on my "kernels-to-test" list.
[Galaxy S II General] It_ler:
SiyahKernel v4.1rc1:

Very, very good battery life in mixed usage. With no manual tweaking (no UV, etc.) - completely default settings.

Siyah v4.1rc1: Battery loss of 1,68% per hour, Wifi: 100%, Awake: 15,6%, Deep sleep: 84%, Screen: 10,0% => loss*(1-screen): 1,51%

It is slightly better than the battery life of SpeedMod K3-31 on my phone for my normal usage.

Best SiyahKernel version I've tested so far.

:good: Gokhanmoral !
[Galaxy S II General] It_ler:
Now I am re-testing SiyahKernel v4.1rc1 with some undervolting.

I tried the extreme UV settings from geko95gek's MagicConfig => http://xdaforums.com/showpost.php?p=26755476&postcount=850, but -100mV for all CPU frquencies is a little bit too much for my phone. So I just set -75mV for all CPU frequencies.

Let's compare the battery life to completely default settings.
[Galaxy S II General] jlevy73:
Excellent job as always, look forward to seeing the results of UV.
[Galaxy S II General] It_ler:
SiyahKernel v4.1rc1 with geko95gek's MagicConfig:

It has the best battery life in night use.

Siyah v4.1rc1 (MagicConfig): Battery loss of 0,67% per hour, Awake: 4,1%, Deep sleep: 95%

Even slightly better than Phenomenal 6.1 Extreme.

The more important battery life is in mixed usage IMO. So let's wait for this test to be finished before making a final statement.
[Galaxy S II General] It_ler:
SiyahKernel v4.1rc1 with geko95gek's MagicConfig:

Worse battery life in mixed usage.

Siyah v4.1rc1 (MagicConfig): Battery loss of 1,92% per hour, Wifi: 100%, Awake: 16,1%, Deep sleep: 83%, Screen: 10,3% => loss*(1-screen): 1,72%

It's the same battery life as for SiyahKernel v4.0.1 and worse than for SiyahKernel v4.1rc1 on completely default settings.

Very strange, but for my light usage the undervolting of SiyahKernel has a negative effect for battery life in mixed usage on my phone.
[Galaxy S II General] Firschi:
I experienced the same issue with siyah 4.0.1. The backside of my phone even got warmer while browsing than with stock voltages... Since I'm really into clean and simple Android stuff, I like the Phenomenal 6.1 best. And in my case the extreme version runs smooth and stable :good:
[Galaxy S II General] It_ler:
Stock XWLPU:

I just flashed stock XWLPU ROM with CF-Root kernel v5.6 for XWLPU.

It's very stable and smooth on my phone.

Everything seems to work fine (camera, wifi, bluetooth, GPS, auto-rotation/senors, etc.).

EDIT:

Added benchamrk results to first post.

Nothing spectacular. Very low results in LinPack (Multi thread) but new high score in AnTuTu.
[Galaxy S II General] It_ler:
Stock XWLPU:

Normal battery life in night use.

XWLPU: Battery loss of 0,85% per hour, Awake: 5,3%, Deep sleep: 94%

Will examine its battery life in mixed usage now.
[Galaxy S II General] It_ler:
Stock XWLPU:

In mixed usage, it has moderate battery life.

XWLPU: Battery loss of 1,87% per hour, Wifi: 100%, Awake: 16,5%, Deep sleep: 83%, Screen: 9,9% => loss*(1-screen): 1,68%

Good but not better than on stock XWLPT.

So I will restore my last nandroid backup of XWLPT ROM with CF-Root kernel v5.6 for XWLPT.

Then I start preparing for further custom kernel tests.
[Galaxy S II General] FeuchtVonLipwig:
Okay so i think i will also stick to my xwlpt. I have a question with that firmware, i think i opened the social hub app once and now i had it in my running applications list after every reboot ( 2 times orange symbol, and one time blue symbol). It also installed sns services for facebook, yahoo and other messaging apps that i dont even use.

Do you also have the social hub app running at least one time? or does it only apply when i start it once?

I just went crazy with root explorer and titanium backup and deleted every kind of bloatware and it runs fine but im not sure if it was so smart to do it :silly:

EDIT:

These are my regular battery stats with a normal battery. I get around the day with at least 3 hours of screen time which is totally okay i think on siyah kernel.
[Galaxy S II General] It_ler:
I tried to disable all Social Hub (and sns) apps via menu Settings > Applications > All, click on the app and choose "Disable" / "Deactivate".

But I had some issues with stock EMail app to sync all my email accounts.

That's why I re-activated the Social Hub apps again.

To optimize your system, have a look here for some very good battery savings tips => http://xdaforums.com/showthread.php?p=16973603
[Galaxy S II General] Firschi:
Try K-9 Mail instead. After that deinstall all hubs and everything that contains "sns" in its name via tb. Reboot and you're done :)
[Galaxy S II General] It_ler:
Thanks for your suggestion.

I tried K9 Mail but I like stock Email widget ... maybe it's only out of habit.
[Galaxy S II General] bluefa1con:
LPU and LPT are identical roms just for different regions
[Galaxy S II General] It_ler:
Stock XWLPT with CF-Root for XWLPT:

Worse battery life in night use.

XWLPT (CF-Root XWLPT): Battery loss of 0,91% per hour, Awake: 5,1%, Deep sleep: 94%

I will continue my mixed usage battery test, but I think that I will have to give it a second battery cycle to settle down to "normal" battery life again ... before continuing next custom kernel tests.
[Galaxy S II General] AllSeeyinEye:
The hubs and SNS apk's are among the first things to be deleted out of every single ROM I install on my phone.

I get similar results, though usually I get 4 hours of screen time, but then I'm empty after 24 ~ 28 hours.
[Galaxy S II General] Anthony25:
Thank you, very interesting post which helps to choose a Kernel ;)
[Galaxy S II General] jackrip5:
I also like the stock Email app. I Do Not like social hub, so i disable every process with sns in it and social hub of course, but i Do Not disable sns 1.5 and snsimagecache 1.0

With this constellation, i dont have any Problem with my stock mail app.

Gesendet von meinem GT-P1000 mit Tapatalk 2
[Galaxy S II General] It_ler:
Hope this will work on phone too.

I'll try it after my current re-test for XWLPT and report back.
[Galaxy S II General] jackrip5:
;)

Gesendet von meinem GT-I9100 mit Tapatalk 2
[Galaxy S II General] wiecho65:
It_ler when you add test result from last siyah? 4.1.1?
[Galaxy S II General] It_ler:
Can't give a specific date.

It is on my "kernels-to-test" list, but I have to finish my current tests first.
[Galaxy S II General] It_ler:
Stock XWLPT with CF-Root for XWLPT:

Nearly the same battery life in mixed usage as before.

XWLPT (CF-Root XWLPT): Battery loss of 1,84% per hour, Wifi: 100%, Awake: 15,6%, Deep sleep: 84%, Screen: 10,0% => loss*(1-screen): 1,66%

As there is a slight difference between my previous battery life test results and the current one, I will give it a second battery cycle before continuing custom kernel tests.
[Galaxy S II General] stoyanow:
Hi It_ler,

Good job man !

To understand that XWLPT with CF-Root 5.6 for the moment is best one about the balance of smooth/performance/battery ?

Thanks !
[Galaxy S II General] FeuchtVonLipwig:
There is no "best" or "worst" rom. Some people prefer XWLPT and other people like something different. You cannot also just compare the battery stats posted here because you would have to do a lot of more testing and each cycle is different. (even if your phone would be like 5 centimeters somewhere else, you could have worse signal and that could influence your battery, as a simple example why it isn't possible to compare two battery results because there are a million of other things that influence i and **** up your results.)
[Galaxy S II General] It_ler:
Correct.

There are many influences for battery life.

I try to keep as much as I can the same for all tests, but there are some influences that I cannot "control" driectly, such as (inter-)network traffic, changes of my instant messaging contacts (Skype, Talk, etc.), weather, etc.

So I try to get a kind of "tendency" out of my tests ... with stock ROM in combination with which kernel seems to be a good combination for a balance between performance and battery life.

And I already received some feedback of other users that they have similar experiences with the same stock ROMs and kernels on their phones.

So take my test results as an inspiration for flashing some stock ROMs and (custom) kernels and check its results (performance and battery life) on your phone under "your" conditions.
[Galaxy S II General] It_ler:
My personal favourite is ATM Phenomenal 6.1 Extreme on XWLPT ROM, as its smoothness is OK for me and its battery life is excellent on my phone for my normal usage.

As every user has other needs and priorities, there is no "general" or "universal" best kernel/ROM.

So i am always on the search for a new best balanced kernel/ROM combination :eek:
[Galaxy S II General] catalinguraan:
Kernel

Hi, lt-ler,

I am following your testing thread, very impressed of the amount of time to test all different kernels.

It is a precious guide for me and for a lot of us,

Please take tour time in testing FalamoK kernel also (undervolt from Speedmod, as Phenomenal). I have used Falamok 2.1 Extreme Hard. Smooth, no bugs, no FCs.

Please find attached scrrenshots of time from 100 to 1-2% battery while loop playing the same Youtube video (with sound on) and some phone calls, while compare to same rom, LPX or LPW modem, but Phenomenal Kernel 5.3 Extreme. For now, I am still on 4.0.3 Wanamlite LPF, but planning to go to 4.0.4 anytime soon. It may be an old kernel, as tou are testing on LPT roms, but give it a try.

Thank you, keep on the good work
[Galaxy S II General] It_ler:
Stock XWLPT with CF-Root for XWLPT:

Although its deep sleep during the night was not so good, its battery life in mixed usage was very good.

XWLPT (CF-Root XWLPT): Battery loss of 1,65% per hour, Wifi: 100%, Awake: 15,7%, Deep sleep: 84%, Screen: 10,1% => loss*(1-screen): 1,48%

Even better than for stock XWLPT with CF-Root for XXLQ5, and slightly better than on the first battery cycle.

So I have a "stable" base for further kernel tests.
[Galaxy S II General] A | | [a] N:
sorry guys, im an absolute noobie

hi,

Just rooted my phone 2 days ago. heard alot of good things about rooted phone especially the batt life span.

I have just flashed a ROM for the first time (Omega Black Blue V15) and find it interesting and cool.

However, i do not know what kernel should i run? (am i asking the right question?)

I just what a nice cool graphic ROM/kernel that can have longer batt life span yet can have a good performance phone.

Im using S2 GT-i1900.

Please don angry if my Q doesn't make sense because im still trying very hard to understand the relationship between rom & kernel and how can i find the best combination.
[Galaxy S II General] It_ler:
First of all: No problem ... you're welcome.

I like Samsung's stock ROMs, so I have no experience with custom ROMs, such as Omega.

Every ROM comes with its own kernel.

First you should try this kernel, as it should be optimized with best integration for this ROM.

Only if you are no longer satified with this kernel, ask in the ROM thread for other compatible kernels.

Not every kernel is compatible with each ROM.

Usually, there is an information in the ROM or the kernel thread about compatiblility.

But best way is to ask somebody with experience ... you should really check the ROM thread first.

Good luck !
[Galaxy S II General] It_ler:
SiyahKernel v4.1.1:

I just flashed SiyahKernel v4.1.1 on my stock XWLPT ROM.

Everything seems to work fine (camera, bluetooth, wifi, auto-rotation/senors, fm radio, etc.).

It is very stable and feels very smooth.
[Galaxy S II General] A | | [a] N:
Thanks alot... was searching up and down, left and right for the right forum...

There seems to be alot... some forum doesnt allow me to comment because i m so new (less than 10 comments :laugh:)
[Galaxy S II General] It_ler:
Oh yes, I forgot about the restriction of minimum 10 posts in XDA for most forums (such as develeopment sections).

Here is a good Q&A thread open for everyone with many experienced users (some Recognized Contributors) helping other (new) users => http://xdaforums.com/showthread.php?t=1648351
[Galaxy S II General] It_ler:
Thanks for your suggestion.

I prefer kernels which have a kernel thread here on XDA.

So it will be not (yet) added to my "kernels-to-test" list, but I keep an eye on it :cyclops:
[Galaxy S II General] It_ler:
SiyahKernel v4.1.1:

Best deep sleep in night use I have ever had so far.

Siyah v4.1.1: Battery loss of 0,68% per hour, Awake: 4,0%, Deep sleep: 96%

Everything on completely default settings.
[Galaxy S II General] superleeds27:
Phenomenal 6.1 Etreme the best so far then?
[Galaxy S II General] It_ler:
It has best battery life on my phone with my normal usage so far.

And it's stable on my phone.

May be different on other phones ... and there are some kernels which might be smoother.

But I am very satisfied with the combination of stock XWLPT ROM and Phenomenal 6.1 Extreme. (Have a nandroid backup of this system, so that I am able to restore it as soon as I feel uncomfortable with my current kernel/ROM.)
[Galaxy S II General] superleeds27:
Is there any app to tweak Phenomenal settings further?
[Galaxy S II General] gevans35:
Me too. I've been trying a few of the ROMs you've tested and have gone back to Phenomenal 6.1 extreme. No performance issues and a marked improvement in real world battery life, the difference between having to charge the phone every night and being able to go two days between charges if necessary. Great combination.

Thanks for sharing your results.
[Galaxy S II General] It_ler:
There is no kernel tweaking app for Phenomenal.

Phenomenal is based on SpeedMod and this is a kind of "flash-and-use" kernel.

Very good for such "lazy" users like me :D

What do you want to tweak?

IMO, it is "pre-tweaked" by default ... better than I could do manually.
[Galaxy S II General] A | | [a] N:
Thanks for the links...
[Galaxy S II General] It_ler:
SiyahKernel v4.1.1:

Good battery life in mixed usage.

Siyah v4.1.1: Battery loss of 1,87% per hour, Wifi: 100%, Awake: 16,3%, Deep sleep: 83%, Screen: 10,4% => loss*(1-screen): 1,68%

It has nearly the same battery life than SiyahKernel v4.1rc1.

So I have to continue my kernel tests.
[Galaxy S II General] It_ler:
N.E.A.K. v2.1.2:

I just flashed N.E.A.K. v2.1.2 on my stock XWLPT ROM.

Camera does not work properly (displays a black screen), GPS does not work properly (GPS toggle doe not work and GPS navigation only works if GPS is on directly after boot).

All other things seem to work (wifi, bluetooth, auto-rotation/sensors, fm radio, etc.).

It feels very smooth.

I got a reboot in Mobile Odin app when selecting a file for flashing. And a second freeze after starting Mobile Odin app.

So I decided to abort the kernel test ... hopefully the new version of this kernel will be more stable on Android 4.0.4.
[Galaxy S II General] It_ler:
DreamKernel v2.7.2:

I just flashed DreamKernel v2.7.2 on my stock XWLPT ROM.

Everything seems to work fine so far (camera, GPS, wifi, bluetooth, auto-rotation/sensors, fm radio, etc.).

The display is very blueish. White is very light blue.

It is stable and feels smooth on my phone.

EDIT:

Benchmark results are OK.

In Vellamo (browser) and AnTuTu it reaches new high scores on my phone.
[Galaxy S II General] superleeds27:
NEAK should be updated within the next few days. Simone has been on holiday.

Redownloading Chameleon ROM, and going to try Phonomenal 6.1 Extreme out on it.

Getting bored of CM9!

---------- Post added at 07:03 PM ---------- Previous post was at 06:36 PM ----------

Any way of changing the scrolling effect on Stock Kernels? Does any kernel offer it?

I know Fluxi did on CM, Ic ould change ti to GB Scrolling. Stock feels a little sensitive!
[Galaxy S II General] It_ler:
Have not searched for a scrolling effect changing method/feature/option. Stock is OK for me.
[Galaxy S II General] It_ler:
DreamKernel v2.7.2:

Grrr .... again the battery charging animation without a "100%" fully charged symbol when the phone is turned off.

I can't believe that most users like it - I like a "100%" when the battery is completely charged.
[Galaxy S II General] It_ler:
DreamKernel v2.7.2:

Very good deep sleep is night use.

DreamKernel v2.7.2: Battery loss of 0,74% per hour, Awake: 4,3%, Deep sleep: 95%

The consequence is a very good battery life.

Now let's see its battery life in mixed usage.
[Galaxy S II General] Siberian Tiger:
Thanks It_ler for your great job.

I have subscribed to this thread and always see your tests :):thumbup::thumbup::thumbup:
[Galaxy S II General] A | | [a] N:
Hi....

If i flashed an updated rom / kernel i.e. V15 to v15.1... Do i have to wipe anything or i jus flash it?

Thnks in advance...
[Galaxy S II General] Siberian Tiger:
Wipe cache and dalvik and you should be fine.

But read roms thread because the developer might recommend a full wipe (because of changes)
[Galaxy S II General] A | | [a] N:
Ic... Thanks for the reply...
[Galaxy S II General] igos2:
Thanks for the great work man, it's very useful for everyone.

Waiting for the next results.

Really thank you man.

Using Tapatalk2 on my amazing GT-I9100
[Galaxy S II General] It_ler:
DreamKernel v2.7.2:

Fantastic battery life in mixed usage.

DreamKernel v2.7.2: Battery loss of 1,65% per hour, Wifi: 100%, Awake: 15,2%, Deep sleep: 84%, Screen: 10,2% => loss*(1-screen): 1,48%

It is nearly the same as for Phenomenal 6.0 Extreme ... I am impressed.

Very good kernel with excellent battery life on my phone.
[Galaxy S II General] It_ler:
Galaxian:

I just flashed Galaxian kernel on my stock XWLPT ROM.

It is stable and very smooth on my phone.

Everything seems to work fine (camera, wifi, bluetooth, GPS, fm radio, auto-rotate/senors, etc.).

CWM recovery but without CWM Manager app - have it installed separately (by apk file).

It has removed SuperSU app ... hmm ... I have re-installed SuperSU app from Play store.

And it looks also a little bit blueish - white is very light blue ... could be something inherited from my previous kernel (DreamKernel)?!

Now I am running benchmark tests and will update first post as soon as they are finished.

EDIT:

Benchmark results added to first post.
[Galaxy S II General] It_ler:
Galaxian:

Good battery life in night use.

Galaxian: Battery loss of 0,82% per hour, Awake: 4,9%, Deep sleep: 95%

Now I keep an eye on its battery life in mixed usage.
[Galaxy S II General] It_ler:
Galaxian:

Moderate battery life in mixed usage.

Galaxian: Battery loss of 1,85% per hour, Wifi: 100%, Awake: 16,3%, Deep sleep: 83%, Screen: 9,9% => loss*(1-screen): 1,67%

It's Ok, but not the best on my phone for my normal usage.

So I have to continue my kernel tests.
[Galaxy S II General] Firschi:
About an hour ago I had a strange incident. The phone started lagging so I decided to reboot it, hence it has been running für like 200 hours at that point. Before the reboot I had 53% battery but after the reboot only 13% were left. I'm running the Phenomenal Kernel v6.1 together with WanamLite v12.4.

I may give DreamKernel a try...
[Galaxy S II General] It_ler:
Just try it and report back.

BTW, what Phenomenal version did you use? (Extreme, Medim or Normal)

Maybe your phone does not work with Extreme version. Then you should try Medium version.
[Galaxy S II General] Firschi:
I've been running Extreme Version for like 200 hours without any issue just until today.
[Galaxy S II General] superleeds27:
Time to test the latest Chameleon ROM With Dreamkernel then i think!
[Galaxy S II General] It_ler:
DM 1.1.0:

I just flashed DM 1.1.0 kernel on my stock XWLPT ROM.

It is stable and smooth on my phone.

Colors are a little bit like sephia - white is very light sand/brown/sephia.

GPS toggle doe not work. When GPS is on, navigation works fine, but switching GPS on/off without reboot does not work on my phone.

And touch key light "always off" does not work - it is always on. The other settings work fine.

Everything else seems to work fine (camera, auto-rotation/senors, wifi, bluetooth, fm radio, etc.).

Now running benchamrks - will update first post as soon as my tests are finished.

EDIT:

Benchmark results added to first post.

EDIT2:

Oh no ... another kernel with that new battery charging animation, where I can only see a green battery and no 100% when battery is fully charged while phone is turned off.

I want the "100%" back !!!
[Galaxy S II General] superleeds27:
What would you reccomend for battery? and also quite configurable
[Galaxy S II General] It_ler:
Battery friendly and highly configurable ... ATM I would recommend SiyahKernel v4.1rc1, as it is extremely configurable and has very good battery life on my phone ... even on completely default settings.

Give it a try and report back !
[Galaxy S II General] superleeds27:
Tempted to just slap Phenomanl on and leave it! Seems to be the best on your list

Plus i cant find a link to Siyah 4.0rc1
[Galaxy S II General] It_ler:
Take the easy way and try Phenomenal.

If Extreme version works on your phone, you don't need to tweak it any more.

P.S.:

It's SiyahKernel v4.1rc1 - but you are right. Gokhanmoral has removed this and 4.1.1 from his download site. And latest v4.1.2 seems to have a problem with its default governor "lulzactiveq".
[Galaxy S II General] superleeds27:
Yeh think i will. Sometimes configuring has worse consequences!
[Galaxy S II General] Firschi:
Yeah, I decided to stick to Phenomenal 6.1 Extreme, too.

Sent from my GT-I9100
[Galaxy S II General] igos2:
It_ler, if you had to travel from two weeks, what kernel will you flash on your stock LPT?

Using Tapatalk2 on my amazing GT-I9100