Hello everyone.
I'm a cognition rom user (currently 1.5.1) for quite some time. Everything is fine, no bugs, no problems at all.
I'd like to ask you guys if anyone has tried another kernel other than ninphetamine that the rom comes with, and had better speed/response/battery life.
Any suggestions?
If you manage to get to my reply beneath that monstrosity of a signature, there's currently 9,365 posts of discussion in its thread [ROM][2.3.5][XXKI3] Cognition S2 v1.6 | Now Live!.
If you're looking for opinions about something related to the use of that ROM, I'd suggest reading through that thread. Searching that thread for "kernel" returned 945 posts.
Siyah, Speedmod or stock based CF Root are the most popular as the moment.
nikzDHD said:
Siyah, Speedmod or stock based CF Root are the most popular as the moment.
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Ninphetamine development kinda stopped at 2.1.3 a while back.
Speedmod, at least the last time I tried, lacked quite some features. It doesn't even do custom boot animation.
Siyahkernel, very good. Pretty much all governor/schedules are there with NTFS support, bln, and very active in development.
CF-root kernel, as stock as it gets. For 2.3.5 anyway, it's been reported to have great battery life. But it doesn't have many functions beyond that.
In any case, the battery life on each kernel, if you don't oc/uc/ov/uv, you won't see much difference. The android os bug, which drains your battery, still happens in all kernels occasionally, when it doesn't happen, battery life depends on your other apps running in the background.
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I have used ninphos 2.04 and 2.05 and alot of chainfires kernels (kg2 kf2,kg3 and more)
I have noticed alot of diffrence regaring batterylife....between each one...I THINK chainfires gives best battery so far and ninphos 2.04 alot better battery than 2.05 (maybe its the BLN support that uses more battery even if BLN is not used)
So now I want a thread were you recomend the best kernels for batterylife!
So what is the your opinion?
Does a kernel really have something to do with battery life?
The kernel ought to be one of the major 'invisible' factors. It is always active, and has an impact of the timing of everything else that happens on the phone. Particularly if there are bugs which have a detrimental impact on battery, the kernel might expose or hide them. That's not to say that the best kernel will necessarily give best battery life.
I don't think it's BLN if not used.
I did some tests and when the lights are not flashy-flashy the phone enters deepsleep as supposed to and my battery life hasn't gone done noticabely, if you don't use BLN at all there isn't even the BLN service running in the back, so even less to worry about.
Ninphetamin is aimed at performance IIRC, so that could really make a difference, CF-Root is pretty much stock kernel + some initramfs mods, so should give same results as a stock kernel.
HellcatDroid said:
I don't think it's BLN if not used.
I did some tests and when the lights are not flashy-flashy the phone enters deepsleep as supposed to and my battery life hasn't gone done noticabely, if you don't use BLN at all there isn't even the BLN service running in the back, so even less to worry about.
Ninphetamin is aimed at performance IIRC, so that could really make a difference, CF-Root is pretty much stock kernel + some initramfs mods, so should give same results as a stock kernel.
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Maybe you are right, but I experience better battery in 2.04 than 2.05.
Anybody have tried speedmods kernel? Does it have good battery compared to CF-Roots kernel?
tshoulihane said:
The kernel ought to be one of the major 'invisible' factors. It is always active, and has an impact of the timing of everything else that happens on the phone. Particularly if there are bugs which have a detrimental impact on battery, the kernel might expose or hide them. That's not to say that the best kernel will necessarily give best battery life.
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Imo I think you are correct since the Kernel is the base for everything while Android is running.
Thus, you better flash to a stable/faster kernel in order to achieve better battery performance ?
I really don't have any experience with the Kernels out there, only flashed to Chainfire CF-root, though I would love to hear opinions about ppl that used few different kernels and tell their thoughts about it.
ShivaShidapu said:
Imo I think you are correct since the Kernel is the base for everything while Android is running.
Thus, you better flash to a stable/faster kernel in order to achieve better battery performance ?
I really don't have any experience with the Kernels out there, only flashed to Chainfire CF-root, though I would love to hear opinions about ppl that used few different kernels and tell their thoughts about it.
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I wrote a little bit in my OP, but I write again, ninpho is really good, very fast and pretty stable...CF-root I see is better battery and more stable but a little slower...
those two I have tried...anybody that have tried others are welcome especially speedmod kernel as I'm thinking about flashing it
tshoulihane said:
The kernel ought to be one of the major 'invisible' factors. It is always active, and has an impact of the timing of everything else that happens on the phone. Particularly if there are bugs which have a detrimental impact on battery, the kernel might expose or hide them. That's not to say that the best kernel will necessarily give best battery life.
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Thanks for your reply mister.
I have a question going on in my mind as this is about kernel, well I also was rooted with CF kernel but lately I flashed Ninphetamine 2.0.5 kernel, only to use BLN, and I have root too, now afaIk, I can't have two kernels at a time, so may I know how I have root still when I've flashed with Ninphetmanine kernel and I have both BLN and Root altogether?
Pardon me if it's a stupid and so called 'noob' query but I'd really like to know this.
Regards.
different kernel does different things.But if your phone has already been rooted,I thought root will stay in your system,after your flash N kernel,you can use BLN with root.
That's what I think,maybe is not true
I've tried several kernel. one of my favorite is ninpo 2.0.5. battery life look good and it run faster.. angelom kernel also good but i've got issues on angelom 16 and 18.. phone run hot when using WiFi.. but angelom give me the best battery life when it come to idle.. but drain fast when i'm surfing..
will try speedMod kernel.. could some one give me some review on this kernel?
Thanks in advanced..
Hi, I am a noob so please help us out?
Flashed my SGS2 (first time android phone)with CF Kernal KG1 to get root, and bloatfreezer to freeze Samsung and Optus crap as per lists on XDA. Rather than getting better battery life I have noticed a quick drain on the battery. Namely Android OS which uses about 50% overnight.
Is this normal? what can be done?
I dont see much of a difference between CF-Root kernel, speedmod, and ninpethaine 2.0.2 - 2.0.5. Except speedmod doesnt allow CPU monitoring, overclocking and undervolting.
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I did try speed mod and honestly, I feel ninpo give better life than speedmod. Well it could just be me but I just tested it at average usage...So, yeah...
zzkonzz said:
Hi, I am a noob so please help us out?
Flashed my SGS2 (first time android phone)with CF Kernal KG1 to get root, and bloatfreezer to freeze Samsung and Optus crap as per lists on XDA. Rather than getting better battery life I have noticed a quick drain on the battery. Namely Android OS which uses about 50% overnight.
Is this normal? what can be done?
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Well honestly, if I remember clearly, there is an OS bug currently. However, why don't you try on other such as KG6 or KG3?
Also, did you install anything middle of the way? Could be an app or something?
how do i install ninphetamine 2.0.5 on Litening Rom 5.0 ?
chiggah said:
how do i install ninphetamine 2.0.5 on Litening Rom 5.0 ?
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Via Odin I think. Select the .tar under PDA.
I've used ninphetamine 2.1.3+ and it used to drain my battery a fair bit. After having seen another user who said he was experiencing better battery life with ninphetamine 2.0.5. I flashed the older version and it turns out to be indeed better.
My idle drain rate is now 15-17mA using Battery Monitor widget.
So when put in picture. Drain rate is about 2% per hour with minimal usage. (Note 3g data was on)
Anyone else have a better kernel?
EDIT 1:
I've tried using SiyahKernel (KI3) and it seems that according to Battery Monitor widget the idle battery drain is 14-15ma. Seems to be much better. However, occasionally the touchscreen freezes and only the touch button works. But then again it could have been because I was using the KI3 kernel on a KH3 rom. Would report back after I finally get off my lazy ass and flash a KI3 rom
EDIT 2:
Got off my lazy ass finally. Flashed LeoMar 2.7.1 rom with SiyahKernel 1.7.8. Will report back after a while. Though I must say that for some reasons after the boot animation the phone turns black for quite a long time (1-4 Seconds) before the lockscreen appears. This did not happened with the default LeoMar 2.7.1 kernel. Will report back in 24 Hours.
http://forum.xda-developers.com/search.php?searchid=92694072&pp=25
Lennyz1988 said:
http://forum.xda-developers.com/search.php?searchid=92694072&pp=25
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Thanks sherlock. I posted my findings and was asking if anyone else had better. If it the time of the month of you. Stay off this forum.
Personally I find it very difficult to make meaningful comparisons, especially at idle.
Battery Monitor Widget gives estimates and not actual current drain. See this thread for some discussion: http://forum.xda-developers.com/showthread.php?t=1056486 but basically it's either not in Samsung's battery driver or the app is not reading the information. So you are comparing estimates and the margin for error might be pretty large.
When you flash new kernels you also need to recalibrate the battery. That also affects your battery drain estimates. (I've had Battery Monitor Widget tell me my battery is going up when its unplugged, so go figure.)
Battery life at idle is affected by so many factors. Maybe your signal strength is better one day than another. Or you got more emails or did more syncing. Or one app just happen to glitch and have a very long wakelock. If you get battery drain, you should be checking your partial wakelocks with BetterBatteryStats. Did you get more partial wakelocks when you were running Nin 2.1.3? Is it the kernel's fault or did you just have a misbehaving app?
I like experimenting with different kernels too, so my point is don't expect miracles when somebody says Kernel X gives amazing battery life compared to Kernel Y. Personally I think they are all about the same at idle, and the big differences are in your settings and your usage. If you wipe your phone, don't add any Google or Exchange accounts, and don't sync or download anything, your battery will last 3 or 4 days on idle no matter what kernel you use.
Stock rooted KI3 (cf-root) is the best for battery life for me, i also have constat 3800+ quadrant score (with top of 4109 as my screenshot in leomar 2.7 rom thread).
Also i have the phone a lot, but really a lot less hot while gaming or stressing it.
KI3 stock kernel and SiyahKernel are at the moment the best in battery life. Anything else is running on older sources and drain more.
The best for me is SpeedMod! Smooth and long life battery. There is something you can't do (bootanimation oc uv bln) but simply great!
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best results for me: stock kernel reflashed after rooting, for that stock rom.
Bar none the way to go.
Stock Rooted KI3 does look good, am yet to test it though
Hmm. So seems like you guys are experiencing deliciously good battery life with KI3 kernel. I shall try it and report back with some numbers.
try siyah kernel. one of the fastest growing kernels IMO
For me is Ninphetamine 2.1.3 and now i'm trying SiyahKernel 1.7.7
My question is.. between stock ki3 and SiyahKernel 1.7.7 the difference is really small (barely notice it) or big?
I tend to not flash to much kernels since the very small chance to corrupt the efs folder (even if ofc i have my backup), so if it's only small improvement, i stay on the stock ki3, if it improves a lot, i prolly try it
I've been using the siyah kernel v1.7.7 and I've been experiencing a great battery life. I didn't use the stock kernel for long to make a comparison but I sugest you give siyah at least a try, since you can always go back to stock if you don't like ir.
Updated 1st post with my new findings.
info5i2002 said:
Updated 1st post with my new findings.
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batistaRom and ninp 2.0.5 great battery life for me...if you like i can post screenshots if anyone is using setcpu, depending on your kernel try and research in the kernel thread regarding frequencies that other users suggest and adjust yours accordingly...thats what i have done for mine and i could not be any more happier
Alright. I've finally got off my lazy ass and flashed a 2.3.5 rom (LeoMar if you must know) and am currently using siyah 1.7.8. Will report back within 24 hours after I've put the device through a day's use.
cf root KI3 stock kernel on RevolutionRom 2.7.1.
53 hours battery life 3 hours 19mins screen time wifi on 1/3 time, 4g on 2/3 time with facebook sync.
scorpion667 said:
cf root KI3 stock kernel on RevolutionRom 2.7.1.
53 hours battery life 3 hours 19mins screen time wifi on 1/3 time, 4g on 2/3 time with facebook sync.
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Pix or it didn't happen
Hi, I posted earlier saying that siyah 1.7.7 gave me good battery life. I tried now the cf root v4.2 KI3 and I had better results. Well, I'm someone that don't play many games, but I surf a lot and download a lot of stuff on wifi. I don't care much for overclocking so I think I'm going to stay wth KI3 cf root. For me they're both great for battery life, and maybe the other ones I have not tried are great also (speedmod, ragemod, ninphetamine...)
I think what happens with kernels, and this happens also with custom ROMs (and everything really, brands, etc..) is there is a lot of fanaticism. People like to choose one ROM and kernel and stick to them. They start to defend the kernels they use convincing themselves they're the best no matter what. That is in my opinion the reason because this kind of discussion turns meaningless. Well not that meaningless, at least it gives an idea of the kernels people are using, at least we know speedmod, ragemod, siyah, nimph, are all great kernels.
I'm not criticizing anyone, in fact, I'm just another example of the people I described.
Hi everyone,
I'm new on this forum as i just got my first android device.
I've already rooted my SGS II and installed VillainROM 3.0 to gain battery life but it doesn't seem to have improved much, maybe it has even decreased, so i must have done something wrong when installing it.
I use CF-Root-SGS2_XX_OXA_KI3-v4.1-CWM4 as a kernel, and the XXKF2_ROM-XXKF2_MODEM-Modem modem, maybe that's what's wrong.
Do you have any idea of better kernels or modems i could use so that VillainROM actually improves battery life ?
In addition i'd like to remove as many services and system apps as possible, and underclock my phone during the night. I've already got autostarts and root explorer for the first two points, but do you have some other apps to suggest?
Thanks a lot !
PS: I've seen the thread about VillainROM, but i can't post there as i'm new here.
Try a different kernel. The rom makes little difference imo but a good kernel makes a huge difference. I always tend to use stock odexed rom with a good kernel.
Hope that helps.
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I'll try some other kernels, thanks.
Which ICS rom for the SGS2 you most reccomend ?
I need a stable rom that support normal life battery and it would be nice if it will be fast also..
sorry if I sound stupid its my first time here
Try them and see - no other way, no short cuts. Your phone use is different to mine and everyone else's.
I've tried eight or nine now, and haven't seen one that's quicker than my GB setup. Of course, YMMV.
By the way, threads on this topic are frowned upon because of subjectivity - don't be surprised if a mod locks it.
LPS stock
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I've tried a few roms and stock and so far wanamlite has on balance been the best experience. Its has excellent battery life, about the same as the stock rom in my experience.
haven't seen this discussed too much, and I'm curoius what others are seeing with battery life when it comes to Stock vs Custom kernels...
Hands down stock kernel, has seemed to be better than any custom kernel i've tried for battery life. and maybe i'm doing something wrong, I've tried all sorts of rom / kernel combos and can't seem to beat stock kernel...
Are you guys seeing something different?
I'd love your opinions!
Thanks guys!
(I'm strictly talking about Battery life - normal use)
BossJ said:
haven't seen this discussed too much, and I'm curoius what others are seeing with battery life when it comes to Stock vs Custom kernels...
Hands down stock kernel, has seemed to be better than any custom kernel i've tried for battery life. and maybe i'm doing something wrong, I've tried all sorts of rom / kernel combos and can't seem to beat stock kernel...
Are you guys seeing something different?
I'd love your opinions!
Thanks guys!
(I'm strictly talking about Battery life - normal use)
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Ive definately noticed this too BossJ
I don't flash custom kernels for battery life.
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