yashsingh1/xdaforums huggingface dataset:
[AT&T Samsung Galaxy Note II] bkeaver:
Everyone's mileage is going to be different. Why not just try it for yourself and see if it's good for you? Plus I'm sure if you comb this thread you will find screen shots.
[AT&T Samsung Galaxy Note II] crixley:
The best of any kernel I've tried on here imo
[AT&T Samsung Galaxy Note II] 2545:
Perseus is the only one I tried and found no reason to look elsewhere.
[AT&T Samsung Galaxy Note II] crixley:
I get about 8 hours screen on time over two days or so.
[AT&T Samsung Galaxy Note II] Andrew149:
I call bs on this. Lets see proof
[AT&T Samsung Galaxy Note II] rha_december:
I've gotten 8 hours onscreen before, but over a 16 hour period, which I'm perfectly fine with.
[AT&T Samsung Galaxy Note II] Andrew149:
Ive been able to get 7 hour screen time also but over a 2 day period I highly doubt it

---------- Post added at 11:17 PM ---------- Previous post was at 11:15 PM ----------

Its possible but not with phone. 2 day period with 8 hour screen time I can barely get 7 hours of screen time straight off the charger from 100% with no idle time
[AT&T Samsung Galaxy Note II] crixley:
I'm hardcore undervolting but sure here are some pics..
[AT&T Samsung Galaxy Note II] crixley:
I lose nothing when in standby either so when I woke up the battery would be at the same percentage..

Like I said roughly two days of me using it (a day and a half off the charger, 36 hours or so)

What reason would I have to make it up?
[AT&T Samsung Galaxy Note II] Andrew149:
Theres people on xda who fake there battery life all the time. 50% at 4hour screen time is normally what I get but ill still end up at 6 hour screen time at like 22 hours
[AT&T Samsung Galaxy Note II] crixley:
ah my battery drain is pretty linear, and as you can see I lose nothing in sleep.

I am also severely undervolting (125-150mV across the board) and not overclocking at all.

Plus I don't make phone calls very often, mostly text, email or fb message.

I turn things off when I'm not using them and use wifi when at work to browse.
[AT&T Samsung Galaxy Note II] Andrew149:
Are you under voltaging just the cpu or everything else like the gpu?
[AT&T Samsung Galaxy Note II] crixley:
gpu by 50mV per step as well.
[AT&T Samsung Galaxy Note II] Andrew149:
Why do you feel the need to ask. :confused:
[AT&T Samsung Galaxy Note II] shaolin95:
Come on now...there is nothing I look forward to more than seeing a kernel or ROM thread go into an endless amount of posts about battery life...first thing I read every morning to start my day with a big smile! :laugh:
[AT&T Samsung Galaxy Note II] bkeaver:
agreed... nothing ever productive or good comes from these types of posts...
[AT&T Samsung Galaxy Note II] crixley:
Someone asked so I answered...

Wasn't expecting so much negative response to come from it.
[AT&T Samsung Galaxy Note II] bkeaver:
This really isn't about you or your answer this is about the subject in general. Dont take it personal.
[AT&T Samsung Galaxy Note II] Andrew149:
You talk about how fast you're phone is :D:thumbup:
[AT&T Samsung Galaxy Note II] Mad383Max:
Blazing! Can't keep up with it! Going to take my nap now.....

Sent from the Millennium Falcon somewhere on the Kessel Run
[AT&T Samsung Galaxy Note II] songokussm:
Could you post your rom, kernal verson, and configuration? I get 3 to 4 hours screen time with no apps and 150 under volt, no oc.

Same question.

I am running clean rom 4.9, kernel 36.3, radio i317UCALIJ2, with everything under volted. (Insert link).

I am currently trying a test where i have nothing installed. No apps, not even a google account.

So far same battery life. 3 to 4 hours screen time. I use my phone mostly for phone calls.

Thanks guys.
[AT&T Samsung Galaxy Note II] crixley:
http://xdaforums.com/showthread.php?t=2016575

This rom, the latest perseus

I'm on Rogers so ma3 radio, 125-150mV undervolt and 50mV on the gpu.

I don't make many phone calls..mostly texting, Facebook and internet
[AT&T Samsung Galaxy Note II] FireBird_89:
Enjoying the kernel so far. Thanks for the great work.
[AT&T Samsung Galaxy Note II] xxBrun0xx:
That's rough. My ATT one x gets 8k, and it's a dual core. I don't think exynos benchmarks as well as it used to, but boy does this phone fly!

On the topic of battery life, this kernel gives silly good battery life out of the box, although I've never gotten anywhere near 7 hours screen on time. I'm pleased with battery life, performance, and stability, and highly recommend this kernel to anyone.

And if you're using an extended battery don't post up about how you undervolt impossibly low to get crazy battery life. Uv'ing does NOT increase your battery life. Just underclocking and bigger batteries :)

Note
[AT&T Samsung Galaxy Note II] crixley:
No extended battery here....

Also as an electrical engineer, I can say without question undervolting does provide better battery life.

---------- Post added at 12:19 AM ---------- Previous post was at 12:13 AM ----------

Here it is in well explained format:

http://xdaforums.com/showpost.php?p=36723175&postcount=19

Maybe try sticking to things where you actually know what you're talking about
[AT&T Samsung Galaxy Note II] xxBrun0xx:
http://xdaforums.com/showthread.php?t=1956346

Having an electrical engineering degree doesn't mean you know anything more than the average user about modern, multicore cpus. I'm a mechanical engineer, but that doesn't mean I'm qualified to modify the power train of a nuclear submarine. Xda had an article on their portal about how undervolting does NOT help battery life based on a series of extensive testing done on a nexus s. I'll go dig that up.

And there's a big difference between trying to educate someone and bring a prick. If you're going to prove someone wrong, at least be polite about it.

Note<3
[AT&T Samsung Galaxy Note II] crixley:
You were the one making grand claims you can't back up....

Reducing voltage = less heat = better battery

Even if it is only a slight difference (say an extra half hour to hour battery life), it is good for your chip and the extra gain is still worthwhile.

Your comparison is ridiculous.. I never said I can work on a nuclear submarine but I know plenty about multicore cpus (much more than the average user).
[AT&T Samsung Galaxy Note II] Old faithful:
Maybe this could be put to rest by starting with the premise that power expended is proportional to the square of the voltage, and that it also depends on the frequency of switching, therefore that power expended is proportional to frequency and the square of voltage.

It must also be understood that as voltage determines speed of charge movement, it must be increased as well when frequency increases.

Secondly, energy spent is also dependent on leakage within the system and that it is more than proprotional to voltage (sorry I can't give you the exact figure - refer to http://en.wikipedia.org/wiki/File:Threshold_formation_nowatermark.gif). Just like networks of pipes invariably lose some of the water they carry, so do microprocessors. It follows that a system under high voltage not doing any work will lose a significant proportion of energy to losses conversely to a system at a lower voltage under higher load, where the losses will be significantly lower.

In other words for a given amount of work it is more efficient to run a cicuit under heavy load at a lower voltage and frequency than at a lower load and higher voltage and frequency, like running a full car versus a bus with the same amount of passengers.

I can understand why it is difficult to conclude how much energy is saved in real world terms by undervolting and underclocking, because there are as many usage scenarios as there are people. But there are definite, perceptible savings undervolting and underclocking.

I therefore disagree with xxBrun0xx based on fact, but am of the opinion that we have to admit he has a point in how significant undervolting versus underclocking is, for any given usage scenario.
[AT&T Samsung Galaxy Note II] crixley:
Am out of thanks but will hit you up for this tomorrow...

I agree, but even 5% battery extra is still 5% at no performance loss. Also much better for your chip as it is running cooler.
[AT&T Samsung Galaxy Note II] xxBrun0xx:
Fair point. Yeah, I really dont want to threadjack, just dont think theres enough gains in undervolting to give up stability. An extra 5% of 6 hours screen on time is a 18 minutes. But hey, each to their own and underclocking aside, this an incredible kernel. Thank you!

Note<3
[AT&T Samsung Galaxy Note II] crixley:
I get 7 to 8 hours typically though and that is with a couple hours of music too.

This phone is incredible as far as battery life goes.

I guess it depends on how you use your phone. I don't stay on Wi-Fi all day unless I'm using it.

I use it mostly for texting and listening to music. On my breaks I'll connect to Wi-Fi and browse for maybe a half hour to an hour.

If I'm on 4g or lte (typically have lte turned off) I'll only get around 6 to 6 and a half hours battery life, but still awesome imo.
[AT&T Samsung Galaxy Note II] roughneckboren:
Holy crap I just had my mind blown by people who are a heck of a lot smarter than me.

Great kernel regardless!

ROOTBOXED!
[AT&T Samsung Galaxy Note II] yogi2010:
i was just reading back a few pages about charging current, etc. and i was trying to find out what the stock values are? i'm running this kernel, with a script that i found that sets values on boot. i like the UV settings, and i do get fast charging times, but i don't want to risk extra heat or battery damage, i just want stock charging currents. does anyone know whcih values here I might change to get stock Samsung charging currents?

dcp_ac_imput_curr=1800

dcp_ac_chrg_curr=1700

sdp_input_curr=475

sdp_chrg_curr=475

cdp_input_curr=1000

cdp_chrg_curr=1000

thanks in advance for any advice.
[AT&T Samsung Galaxy Note II] Old faithful:
No worry, these are the stock (default) values and are meant to protect the charger/USB port :)

However, if you are concerned about your charger overheating, I suggest:

lowering

dcp_ac_chrg_curr=1700

to

dcp_ac_chrg_curr=1300

This will prevent the charger from pushing too much current. It has been my experience that this can induce cycles of very high and very low charging and in some cases the charger even shuts down altogether.

Also, lowering the voltage maintains the charging current at the limit and at at a constant rate if you set

ignore_unstable_power=on

which bypasses phone charging current reduction due to the dirty power waveforms common with aftermarket chargers with low component count.

In any case, like driving at a constant 90km/h is better on the car that constantly braking to 70 and and accelerating to 120, so is reducing charging current. Remember, 1300mA on a 3100mA battery still gives you 3100mAh/1300mA=2.66h charging speed, very close to stock.

If you are working on the device while it's charging, like GPS navigation, it can use a large amount of current (typically up to 1000mA). you therefore want to make sure not to get too close to the charger upper limit (here set at 1800mA) especially when using aftermarket car chargers most of which only produce 1300mA in a steady regime and 1800mA or so only in short stints before shutting down from overheating.

Therefore you could lower

dcp_ac_imput_curr=1800

to

dcp_ac_imput_curr=1600

for example, if the charger tends to overheat in this usage scenario.

Bottom line, these values determine how hard your charger is being pushed. You just need to adjust the values to something that feels comfortable; I simply feel how hot the charger becomes. Presumably in winter you could up this rate and may need to lower it in summer.

In any case if you feel uncomfortable playing with ignore_unstable_power, leave it at stock (off) and the phone will determine the charging rate. Of course, you may not like how slow it can sometimes charge, especially with aftermarket chargers and cables.

***

Now for protecting the battery itself, you should look at these values:

batt_chrg_hard_volt=2
batt_chrg_soft_volt=4290000

These two are the most important settings regarding the battery.

The first setting determines max voltage at which to charge the battery (1=4.20V, 2=4.35V (default) and 3=4.40V).

Lowering this figure will give you less effective battery capacity for a gain in life span and better protection against thermal runaway, as the Li-Ion technology is very sensitive to overcharging.

The second setting determines the max battery voltage at which the charging algorithm switches to constant current to constant voltage, lowering this will make charging switch to constant voltage (trickle charge) earlier, the default switching at around 90% capacity.

Normally, you would only change these two settings if you replace your OEM battery with an aftermarket one of a slightly different technology.

Hope this helps!
[AT&T Samsung Galaxy Note II] yogi2010:
Heck yeah that helps, thanks a million! If my values are stock i might just keep them and not worry too much, and just change things if i have issues or concerns later on.

Thanks again for the awesome post, it was just what i was looking for!
[AT&T Samsung Galaxy Note II] Old faithful:
I sometimes get carried away... :)

Sent from my Note 2 - Text mostly by Google Voice, May Contain Weirdness ;)
[AT&T Samsung Galaxy Note II] yogi2010:
i needed someone to get carried away on that topic :) much appreciated.
[AT&T Samsung Galaxy Note II] xxBrun0xx:
I absolutely agree, I don't really feel comfortable playing with any of the settings this Rom has to offer until someone gets carried away with in depth explanations. Thank you so much!

Note<3
[AT&T Samsung Galaxy Note II] Responsibility:
Is this for AOSP or TW?
[AT&T Samsung Galaxy Note II] ahmarchi:
Tw only
[AT&T Samsung Galaxy Note II] amdfanTO:
Is there any possibility of getting an aosp version running? Honestly this kernel cannot be replaced due to the fantastic calibration built in to the kernel. If an aosp kernel is not possible, can the display calibration be shared so that it can be implemented into other kernels?
[AT&T Samsung Galaxy Note II] suchevent:
use devil kernel, which is based on this fantastic kernel (i.e. has the same features/functionalities) and runs on aosp/aokp roms.
[AT&T Samsung Galaxy Note II] Skyrocket2Paradise:
want to double check before flashing i know it is mentioned in the change logs but this kernel supports exfat correct? and hdmi out is fully functional?
[AT&T Samsung Galaxy Note II] neoissuperman:
It does support Extfat, not sure on hdmi/mhl out I use dlna or imedia share.
[AT&T Samsung Galaxy Note II] tpowell.ca:
MHL Works great.

Just wish it supported NTFS formated drives :silly:
[AT&T Samsung Galaxy Note II] V@no:
Plenty of support to choose from:

https://play.google.com/store/search?q=ntfs

I've tried the paragon one and enjoyed 2TB expansion storage :)
[AT&T Samsung Galaxy Note II] 2545:
What is Universal Perseus?

There's a thing called universal perseus kernel here:

https://github.com/AndreiLux/Perseus-UNIVERSAL5410/wiki

Is this only for S4 or does it work for Note 2 and the newest version?
[AT&T Samsung Galaxy Note II] xxxSuperserieSxxx:
I think its for S4, the file say Perseus-alpha7.2-i9500-CWM, since i9500 model is for S4
[AT&T Samsung Galaxy Note II] 2545:
Ok, thanks. I got confused since few mentioned that they were using that kernel with their note 2 in that particular thread.
[AT&T Samsung Galaxy Note II] jeanluc1701@hotmail.com:
Link broken, I cannot download the kernel
[AT&T Samsung Galaxy Note II] bkeaver:
And you had to quote the OP like no one could figure out what you were talking about Lol.

Just downloaded fine for me just now...

Sent from my SGH-i317 Note 2 on Tapatalk 2 - running on Beanstalk powered goodness!!
[AT&T Samsung Galaxy Note II] jeanluc1701@hotmail.com:
Sorry about the OP. My mistake. Still not able to download the .ZIP
[AT&T Samsung Galaxy Note II] Froid:
Downloaded fine here. You've tried multiple browsers and from PC and mobile? Downloaded directly from tapatalk
[AT&T Samsung Galaxy Note II] warriorpluto:
Anymore updates to this kernel?
[AT&T Samsung Galaxy Note II] neoissuperman:
No, i stopped using it weeks ago.... things just stopped working. WAY late on that........ lmao
[AT&T Samsung Galaxy Note II] K-alz:
Man, I really wish that the dev continues updating this kernel. Much much needed on 4.3 TW ROMs.
[AT&T Samsung Galaxy Note II] raze_da_noize:
This kernel doesnt work with 4.3 stock rom?
[AT&T Samsung Galaxy Note II] K-alz:
It didn't when I had my note 2 4 months ago as you can see from the date on the post. I don't know if it does work now or not. Best kernel out there imo

From my 3rd note powered by:

V8 FN engine with nitrous...!!
[AT&T Samsung Galaxy Note II] Dharmaboy75:
So I installed this but now I have a Boot to a Galaxy Note 2 logo and a black screen. I used CWM , installed from zip, said yes to the 2 prompts and rebooted. and nothing.

Any ideas?
[AT&T Samsung Galaxy Note II] xBkKx:
Judging from the previous posts this ROM doesn't work with stock 4.3 ROMs and I'd assume it doesn't work with ANY ROM over 4.3 and following the link in the first post which states this thread is a proxy of the main one located HERE which has been closed its safe to assume this kernel is no longer being worked on. Perhaps you're trying to use this kernel on an unsupported android version?
[AT&T Samsung Galaxy Note II] Dharmaboy75:
I see. Hmm.. any suggestions on a kernel i can use for this device? I just need it up and running to test some stuff for AppRadio Unchained.
[AT&T Samsung Galaxy Note II] xBkKx:
I personally use Devils kernel (based off of Perseus) but see many people mention using AGNI.

Devils kernel: Devil 20140316 - Thread: Devil kernel thread
[AT&T Samsung Galaxy Note II] Dharmaboy75:
I just tried this kernel. I installed. I wiped Cache, said fix Root permissions, and rebooted.

it reboots, shows the Galaxy Note 2 logo, Shows the Devil kernel splash page and then goes to a black screen.
[AT&T Samsung Galaxy Note II] Froid:
What version of Android are you running?
[AT&T Samsung Galaxy Note II] xBkKx:
What phone model do you have and which ROM are you trying to flash it on?
[AT&T Samsung Galaxy Note II] Dharmaboy75:
I have a Model SGH-I317M, Rogers Canada running Stock 4.4.2.

update - I was able to get the Stock Rogers rom, I Odin'd it, and its working fine now. I had to reroot and now fix the stupid Knox blocking the SuperSU.

Thanks for all your help
[AT&T Samsung Galaxy Note II] d8n0g:
Is this 4.4 compatible?
[AT&T Samsung Galaxy Note II] xBkKx:
I'd recommend giving Devils kernel a try as its based off of this kernel.
[AT&T Samsung Galaxy Note II] NVM5282:
i installed the perseus kernel and got same problem , black screen , so if i flashed devils kernel i will get it working again? or i will have to flash new frimware then flash kernel? i'm on stock 4.4.2 and n7100
[AT&T Samsung Galaxy Note II] BigBake88:
Why would anyone flash a kernel that hasn't been updated in nearly 18 months when they are running Kitkat?!?! Lolol
[AT&T Samsung Galaxy Note II] SmithO77:
After installing the Adaway webserver no longer stays on & I'm experiencing serious lag in games, when playing more then a half hour. The RAM is close to full & I would have to exit the game & re-enter for it to stop. Is there anyway to fix these two problems?
[AT&T Samsung Galaxy Note II] dafoxs:
After 11 hours on this kernel, this my results

40% battery left

Almost 4 hours of screen time, some heavy use

No overclock

I'd say great work on this kernel.

Thanks a ton.

Sent from my SAMSUNG-SGH-I317 using Xparent SkyBlue Tapatalk 2
[AT&T Samsung Galaxy Note II] garyd9:
Only one very minor correction: The dalvik cache has nothing whatsoever to do with a kernel and if you are only flashing a kernel, then clearing the dalvik cache only results in Android's Dalvik virtual machine having to rebuild it on the next reboot.

Take care

Gary
[AT&T Samsung Galaxy Note II] cdshepherd:
Flsshed this earlier using Mobile Odin. Went flawlessly. So far so good. Gonna run it for a day or two before I mess with anything. Thanks for this.
[AT&T Samsung Galaxy Note II] ChickenSamwich:
Very helpful guys, thanks.

Are kernels compatible no matter what rom you're using? I'm currently using the Suarom rom.
[AT&T Samsung Galaxy Note II] xtreampctek:
Thanks for the information, Never knew exactly what It was by clearing the dalvik cache but It was requested when flashing some kernel on my vibrant and I guess it just stuck. Learn something knew every day!
[AT&T Samsung Galaxy Note II] AndreiLux:
Can somebody check the new version? I have a new build environment and having some strange file size consistencies between the NA variants..
[AT&T Samsung Galaxy Note II] garyd9:
I'm mobile right now, but flashed it anyway. I really wont be able to do any in depth checking until I get home, but the only issues I see so far that appear to be new are:

After flashing this, my wife is grumpier than normal

My facial hair seems to be growing out faster than it used to

The sun came out and all the clouds are gone... which made the screen harder to read.

(I dont really see much difference... but figured I'd try to give you a laugh after some of the stuff seen in the n7100 thread.)
[AT&T Samsung Galaxy Note II] johnnywhojr:
Hey. I was just wondering what the best set up is using rom tool box? I've flashed a million or so times a new kernal, but never really set it up to full potentional. So was just wondering if I could get a point in the right direction.

Thank you in advance!

sent using gNote II.
[AT&T Samsung Galaxy Note II] Goatblaster:
Just flashed this on Bell i317m, and I too am seeing similar issues to garyd9. Hair is popping out, sun is out and clouds are gone. Only difference here is that the dog in my neighbor's backyard stopped barking when I flashed the kernel. Fantastic addition, ty.

:P

Only think I haven't tested yet is to see if I can still connect to LTE. I'll know in about an hour though when I get closer to the city, I typically don't get LTE here in the house, just H+ (which is working fine). So far so good.

Edit...lte is fine too.
[AT&T Samsung Galaxy Note II] johnnywhojr:
Nvm...I found the "how to" in the general form.

sent using gNote II.
[AT&T Samsung Galaxy Note II] xtreampctek:
I just wanted to throw this out there, But under Kernel Version in "About Phone" it shows this kernel as alpha25. I flashed the Alpha26.1 via ODIN and CWM then checked just to make sure it was updated.
[AT&T Samsung Galaxy Note II] AndreiLux:
Forgot to change the label on that. Consider it 26 till I update it again.
[AT&T Samsung Galaxy Note II] 9wire:
Well, all of a sudden I'm taller and my hair is thicker. Good work, sir.

My phone seems to like 2048 and sio, what do you guys run?
[AT&T Samsung Galaxy Note II] dafoxs:
Ruining stock no oc. My gf is glowing though
[AT&T Samsung Galaxy Note II] ElAguila:
Just flashed the new kernel. I was checking my voltage setting as I like to run it at -25mV to help a little with the battery. Except now I can't remember if I saved the default before or after applying that. I was wondering if anybody could tell me what the default voltage is on this kernel when the cpu is running at 200mhz. Is it 888mV?
[AT&T Samsung Galaxy Note II] rockinandroid:
Hey, what did you do to get those speeds...Please share

---------- Post added at 11:12 PM ---------- Previous post was at 10:19 PM ----------

Do anyone know what they are using for a govern on this kernel.....are you using pegasusq or performance????
[AT&T Samsung Galaxy Note II] xtreampctek:
Pegasusq is what you want to use for the most part. Performance basically turns on all cores and runs them at max frequency, nice for benchmarks, useless for anything else except draining your battery and keeping your ears toasty during phone calls.

As for tips onto increasing your quadrant score, running the performance governor is one but your going to want to look into jacking up the CPU clock (use SetCPU) and the GPU clock (the script that bluntman420 provided is already thrown together which you can find here, just use a program like SManager to have it run on bootup)
[AT&T Samsung Galaxy Note II] rockinandroid:
I get error trying to run it...am i doing something wrong?