yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] popy2006:
Can confirm high battery drain with 2.3.4 :( AOS bug still here

Samsung put your ass up and fix this!

cu

pOpY
[Galaxy S II General] RogerPodacter:
just posted in another thread. but here is nexus one numbers, the proper usage patter for Android OS.

unplugged 15 hours 46 minutes

Display on - 2 hours 36 minutes

Android OS - 2% - 5 minutes 10 seconds

battery is at 46% right now.

so running for 15 hours and android OS only uses 5 minutes of CPU time. this is typical, and same on the nexus s, etc.

there is some weird bug in the SGS2 implementation.
[Galaxy S II General] kerman19:
I'm currently experiencing the increase in Android OS usage, while it's not high, it's still hit the phones battery life pretty hard in comparison to previously.
[Galaxy S II General] aydc:
It's the wifi baby!!

When I leave the phone idle overnight with 3G on and wifi off it spends around 4-5% overnight (in 6.5 hours).

Last night I decided to leave wifi on to see what happens. When I was going to bed battery was at 97%. When I woke up it was 72% !!! Android OS use was at 95% !!!

So I think wifi is what triggers it. I lose 25% in 6.5 hours just by leaving wifi on.

It's amazing how Samsung can't fix this. It's been 4 months since this phone is out and it spent a lot of time in testing. How hard can it be to fix something this serious?
[Galaxy S II General] gaui:
I haven't experienced any WiFi sharing drain after I switched from KE7 to KF3.

But I'm waiting for an official 2.3.4 release from Samsung, that'll fix the Android OS drain bug. At least it fixed it with my old Nexus One.
[Galaxy S II General] lindsaytheflint:
Why wait for an official 2.3.4? There are plenty of custom ROMs out there.

Although, don't count on 2.3.4 fixing the issues. I'm still able to reproduce them on 2.3.4 if I try.
[Galaxy S II General] 380AU:
Yup. Same here.
[Galaxy S II General] CarpathianUK:
Same here too - amongst other things this has indeed vanished for me as well after pushing KF3
[Galaxy S II General] CarpathianUK:
You have to be careful when viewing screens like that in isolation as we've no idea what the phone has been used for during that period. If you've not used that many apps or just left the phone on to test it then the OS percentage will always be high as it will be the main thing running. It doesn't mean it's taken much battery but just that, as a percentage of the battery used, it was a greater part.

It's hard to explain easily but a high percentage does not automatically show a high drain unless other things are known about that period of use.
[Galaxy S II General] Tsapper:
I think that this bug really has somethiong to do with WiFi. I have noticed that when AOS process goes crazy it can be "tamed" by "playing" around with wifi.

For example I have just activated allshare and watched a movie for a minute or so and boom! AOS process tames down and so does the activity while the screen is off

These go hand in hand. When AOS starts acting crazy you can also see that the sleep activity skyrockets too.

I have also noticed that there are many levels in the craziness of AOS process. For me it usually rises to 30-40% from the normal 15-23% but once it went all up to 75% and then it drained my battery really really quickly.
[Galaxy S II General] rantzzz:
I think the best gauge is to see in the blue bars, how often the phone is awake when the screen is off.

However, if you talk for long hours on the phone, the phone may be recorded as awake while the screen is off, so take note there :D
[Galaxy S II General] popy2006:
Why dont we spam Samsungs FB site with an AOS slogan?

Maybe the wake up than!

We have payed hundreds of bucks for a buggy phone :(
[Galaxy S II General] d3l1:
I tried restarting FastDormancy (disable -> enable) for the last charge -> no difference

now I will try without any WiFi

last try will be with FastDormancy disabled

after that I think the last option is Root and then freeze apps.
[Galaxy S II General] kerman19:
I know what you mean, and I understand that it 'could' be at the top of the list when the phone has been doing bugger all, but with push notifications and other things going on in the background it should not be at the top of the list.

In fact I've used my SGS in pretty much exactly the same circumstances set up identically, same apps, same push notifications same widgets, the lot.

The end result is that 'Android OS' was used for a total of 4mins, instead of over an hour reported on my SGS2.

Phil
[Galaxy S II General] kerman19:
The following screenshots are from my SGS, clearly it doesn't suffer from the same issue.

Phil
[Galaxy S II General] spookyx:
It does suffer from some sort of misbehaviour. Look at Awake vs. Screen On.
[Galaxy S II General] kerman19:
Perhaps, but nothing that consumes battery at any increased rate. As you can see the battery life is pretty decent.
[Galaxy S II General] poulsky:
Haven't heard about until now. But they doesn't support the DIR-655. :-(
[Galaxy S II General] yinhau:
FYI

Just now my wife playing pvz on my phone, and she complaint the camera area is very hot. I check process list using osmonitor, and notice cpu usage 50%++. Immediately I off the phone immediately(not sure what app running at that time), and turn on again, cpu usage avg to ~10%.

My battery drop from 50%+ to 13%!!!

Here I attached screenshot from "battery mix" app
[Galaxy S II General] David Roosendaal:
I think the AOS bug is over rated.

A high percentage in "OS" does not constitute a high battery usage.

I do agree that there are most likely some processes that are misbehaving, but I think we need to leave it to Samsung to identify and solve.

Even with high OS pctg I get a very good battery life so the two clearly don't link. Strange? Yes. Bug? No.

My 2c

Edit: this phone gives me WAY better battery life than any HTC I ever had. I think Samsung did a great job in selecting low power radios and high performance cpu/graphics. It's fast and it lasts.
[Galaxy S II General] Sp1tfire:
My guess is Android OS is not the sole responsible for the high percentage. My Android OS never gets past 15 % tops, be it after 8 hours of stand-by or in regular usage. So that makes me think it's somehow connected to other system apps or user installed apps which are running in the background and this combo leads to a Molotov cocktail.
[Galaxy S II General] CarpathianUK:
I'd stress again, for those people quoting raw percentages that are shown on the "Android OS" item that these, in themselves, mean nothing at all.

You could use the phone very little for an hour and have the AOS show as 80%. This would be expected, normal and have potentially little drain on the battery. "80%", however, looks like a high number and scares people (for obvious reasons) into thinking the process has taken over.

It doesn't mean that the AOS process have been running at 80% of drain (ie nearly full-on draining like a monster) but more that 80% of the amount of battery loss over the time measured has been due to that process. If the battery has only gone down 7% in that time then it's only 80% of that 7% drain which, frankly, is nothing in real terms and still gives a long battery life. If you happen to not run many apps for a period then the AOS value WILL be high as a percentage of that period.

I hope this makes sense - not sure how else to phrase it!
[Galaxy S II General] NIK516:
The leaked update to 2.3.4 does not look to be stable atm. And aos is still an issue so, hold off for official release.

Wife sharing is better on kf3 seems to be the best update fore now.
[Galaxy S II General] js931:
"wife sharing" .... harhar ;-)
[Galaxy S II General] CarpathianUK:
I read that post twice and completely missed that! :p :D
[Galaxy S II General] David Roosendaal:
Well spotted!
[Galaxy S II General] Sp1tfire:
Wife-sharing is nice no matter what firmware you have on your Sammy :rolleyes:
[Galaxy S II General] ithehappy:
Mine, can anyone tell me why AOS is on for 47 mins?

Regards.
[Galaxy S II General] CarpathianUK:
Very hard to give any info on why without knowing what you've been running but to have it running for just a total of 47 minutes out of nearly 52 hours up time seems pretty good going and far from extravagant - I'd not be moaning about that! :)
[Galaxy S II General] ithehappy:
Hmm, I am running some widgets and few apps. Nothing is set to Auto Sync, everything is manual.

Regards.

Sent from GT-I9100
[Galaxy S II General] goodwinod:
Hopefully 2.3.4 will solve this problem for everyone.
[Galaxy S II General] rantzzz:
Usually my Android OS is on for 45 minutes out of 14 hours on battery!

Android system uses 1 minutes usually though :rolleyes:
[Galaxy S II General] DoubleYou79:
The leaked KG1 has made a difference for me I have to say. Phone is running for 36 hours now and still 34 % left. Not too heavy usage but I never got that far with any other build. Android OS is still at 57% but the usage itself is way better for me.
[Galaxy S II General] cashisback:
Maybe it only looks high because you are not using other battery consuming apps/processes..............
[Galaxy S II General] jonny68:
I dont even get half that, my phone was @ 99% last night at 12.29am and when i awoke this morning at 09.59am it was at 83%, that is with data enabled and 2/3 widgets, today with light to moderate use, that is music, some internet, some calls and texts and 1 reboot i got just under 17 hours until the phone died, im currently charging it and the phone is off as i deleted the battery stats last night.

I'm on Lite'ning ROM 1.5 and have frozen most Samsung apps, i have fast dormancy disabled but im not 100% that has made a difference so im going to enable it and leave the phone on again (on vibrate) with data off tonight and see how the drainage compares, of yeah brightness is set to auto,ill also remove and widgets i have tonight just to see how things pan out

And android OS was about 45% while the phone was on "idle" last night but gradually went down during the day to around 18% but a few days previously it has been as low as 8%,thankfully ive not experienced severly high Android OS like some people (1 user had 87% or thereabouts which is madness)
[Galaxy S II General] d3l1:
My Android OS is only high when I constantly use wifi at home. If I turn it off and use data there is a lot less use by that process but the battery drain is worse because the phone is constantly switching between 3g and H. There us something messed up but I can't find a solution, turning off FastDormancy didn't change a think regarding the drain.

Sent from my GT-I9100
[Galaxy S II General] jonny68:
My Android OS is really only high when the phone is in standby,when im using the phone it goes right down.
[Galaxy S II General] nicolasf:
I'm on KF4 (I think).

Here's "one day" of usage:

At 7h 25m of battery usage, I have 28% left. (about 9.6%/hour)

Display on: 1h 20m 28s

Android OS: 36m 13s (CPU)

Android System: 1m 24s (CPU)

Voice calls: 14m 38s

I also have Wifi Sharing showing up, which is not nice considering I haven't used it.

EDIT: If you do the maths, Android OS is using 8% CPU on average. That seems like a lot if you consider the phone had it's display on only 18% of the time.
[Galaxy S II General] nraudigy2:
Mine is 15%. Is that bad?
[Galaxy S II General] nicolasf:
I was mentioning CPU usage. Battery usage was 19% for Android OS on that case.
[Galaxy S II General] htc9420:
android OS math

I have posted some findings about how it interferes with daily performance and how it's robbing us each and everyday of call time,display, standby and so on...

http://xdaforums.com/showthread.php?t=1166140
[Galaxy S II General] kerman19:
You make some good points, and it fits my argument that after a full cycle on battery my Android OS usage is always over two hours, which is a lot considering we should not be even getting it!

Phil
[Galaxy S II General] dinoc:
After 1 day and 12 hours my AOS is 9% .

The phone was used on 3g data (always on)

Exchange server set to manual (not push)

All animations are off

Sipdroid running on background during working hours (using TCP)

I'm not using widgets, except the weather one.

What bothers me is the 'pulse' app , it shows 18% , even if the automatic updating for this is set to off
[Galaxy S II General] ithehappy:
Guys what are these articles saying? Frankly I don't see any performance decrease at all after using ATK, but still I am curious to know.

FAQ: Why You Shouldn’t Be Using a Task Killer with Android

AndroidSPIN Why you don’t need a task killer app with Android.

Android Task Killers Explained: What They Do and Why You Shouldn't Use Them
[Galaxy S II General] xnutral:
After around 5 hours of use i have 56%battery left of wich 70% AOS and 2 h 52 min of cpu use. This is with 2.3.4 it seems samsung still has something to fix
[Galaxy S II General] judgepd:
Finally someone that gets it!
[Galaxy S II General] DoubleYou79:
I am sure there is more people who get it. You just don't read from them because they don't complain ;-)
[Galaxy S II General] RizSher:
True, but not quite.... most people who complain of AndroidOS eating up the battery do it cos they have something like 10% or higher battery drain/hour. So, over 5 hours, thats 50%, and if 60% of that is AndroidOS, and hence 30% of total drain thats a very significant usage by the OS itself in a mere 5 hours, when one would normally expect the superbg LED display to eat up most of the battery.

I've been flashing all sorts of kernels and roms, and wasn't going anywhere. Yesterday, the r2-stable version of this Kernel: http://xdaforums.com/showthread.php?t=1145586 on top of VillainRom2.0 and got the best battery drain I've seen on the SGS2 ever, circa 3.33% averaged over 8 hours or so, but noticed the phone rebooting randomly... then flashed CF-Root-SGS2_XX_OXA_KG1-v4.1-CWM4 (from http://xdaforums.com/atta...9&d=1310388033) on top of the r2, kept VillainRom2 as it was... random reboots disappeared, AndroidOS usage has been under 15% for the last 14 hours, and battery life has been around 5%/hour. give it a try.
[Galaxy S II General] :
wow

changed from exchange push to 15 min. polling intervall and the battery life increased from 1 day to 2,5 days. also the AOS time is now lower.

this fixed by battery drain now on 2.3.4
[Galaxy S II General] bibihest:
I'm also hit by this issue on the SGS. Within hours, it can drain 50% of my battery in a couple of hours.

It works fine for a couple of days, then BAM and the phone is dead

I hope they fix this soon as it's starting to p*** me off. I can't rely on my phone anymore, Can't depend on alarms or anything.

Looks like this

http://dl.dropbox.com/u/3995146/Billeder/Diverse/usage.jpg
[Galaxy S II General] amitambika:
If my phone shows that it was awake even when the screen was off, how do I know the reason for that ? How do I see which apps were keeping the phone awake even when the screen was off ?
[Galaxy S II General] tonycfc:
I get the 'Android OS' process bringing down the battery life before, it does not always happen but sometimes. But the thing is, 'Display' is what drains my battery the most, rarely does the 'Android OS' gets number one. I only got it once but after a hard reset, it's gone.
[Galaxy S II General] jbdeq:
I installed VR2.0 and manually reinstalled all apps. Now get about 50 hrs battery life on light-medium use. Previously had loads of widgets running and high AOS and would only get about 20 hours. Cant be sure but pretty sure the widgets were major contributory factor to bad battery life.

My "awake" time would appear frequently on the battery usage graph even when screen was off. Now it only appears when screen is on.
[Galaxy S II General] ithehappy:
..and that is very very normal.
[Galaxy S II General] borchgrevink:
I wonder the same thing...
[Galaxy S II General] Limpperi:
i experience no problem here. and screen on time about 30min
[Galaxy S II General] nikzDHD:
Mines about the same in display time but as you can see from my screenshot aos is slightly higher but not much of an impact.
[Galaxy S II General] ithehappy:
Watchdog from Market.

Besides, after using ATK I don't have that damn Awake problem when Screen is off anymore. This is mine after 1 day of usage,

Uploaded with ImageShack.us

Regards.
[Galaxy S II General] AndreiLux:
Well I somewhat managed to improve the idle time compared to what I had previously:

Which would basically mean about 5 days idle (With Wifi and Trillian/Skype running) if it continues as is. Still weak compared to what it would be with what it would be with Internet connectivity off (Wifi or 3G) as then the AOS process just runs for seconds or minutes instead of hours, and it takes hours to even drain a percent of battery. But that's just avoiding the problem not fixing it.
[Galaxy S II General] Ludekx:
hi

I see battery life improvement after checking off motion activation option.

From my observation this option keeping phone in awake state while it is in motion
[Galaxy S II General] pik1:
sounds reasonable...
[Galaxy S II General] bibihest:
Mine mostly uses the battery at night when I'm not moving. Disabling everything in the phone will improve battery no matter what.
[Galaxy S II General] aydc:
I'm using the new CyanogenMod 7 first nightly build, and the Android OS bug is alive and well. :(

It means this bug is a lot more fundamental and serious than we thought, if it even shows up in an AOSP ROM. It probably lies in Samsung's drivers, which CM7 uses as is.

I'm starting to think that we'll never get rid of it... :(
[Galaxy S II General] tameracingdriver:
I get this "bug" but to be honest, my battery life is pretty acceptable.

Example, at the moment, I'm on Villain ROM 2.0, 3G + Wifi turned on, google syncing all on, facebook updates, and one or two other things...

So far 8.5 hours since charging, screen on time 23 minutes, using 22% of the battery. Android OS is on 58%, but I'm on 86% battery.

If you scale that kind of use to a full charge, then that is 60 hours on a charge, and with 163 minutes of screen on time.

I don't think that is particularly bad, but that could just be me. But then I don't expect my smartphone to last 2 weeks on a charge - it mostly lasts a day, because most of the time I use it pretty comprehensively.

I'm wondering if this bug is a load of "hype"?
[Galaxy S II General] Cabanon:
one month ago, we had to get a replacement Nexus One phone since the last one locked up on the wrong carrier. since then, we upgraded to 2.3.4, and to my big surprise, its eating battery like it never did. back on 2.3.3, we used to have at least 3-4 days of operating, now on 2.3.4 its less than a day, and its starting to piss my wife off. i thought i could root it and use custom rom to fix the issues but from what im reading, it doesnt.

could i just return the phone again for bad battery ? or is there a fix for this ugly problem ?
[Galaxy S II General] twitceh:
Those are really impressive screenshots, can you give us a rundown of what firmware you're running? I am impressed by your display on time, I can only get about 12 hours with 4 hours display on time.
[Galaxy S II General] popy2006:
I also dont understand why you all get so high runtimes!

Mine drains also in about less than one day :( with 10 min calls and display on time.

Google, Exchange, FB sync, WLAN & 3G is on all the time.

My AOS Process is always on the top ~ 60% :(

i want my desire back :mad:

Also not good news that CM7 nigthly also has this draining problem...

cu

pOpY
[Galaxy S II General] ithehappy:
My firmware is written on my siggy, its Stock XWKF3.

Using Juice Defender Ultimate for last few days and the battery life just gotten better. There is very minimal Awake and Screen On bar Non-Synchronization. But one thing, after I updated to KF3 my Display On time is 5 hours always, sometimes it is even close to 6 hours.

Latest screens, can you notice battery got increased at a point?

Regards.
[Galaxy S II General] ccrows:
I used to have that problem until I finally turned off "syncing" for good and I've never looked back.

I do "ALL" of my syncing "manually" through each app as needed and my battery life is good... ;)
[Galaxy S II General] popy2006:
Yeah but i dont want to manually sync. We have killer phone and must sync amnually :-(

My good old desire lasts loooooooooooonger with automatic sync.

I have giving up hope samsung will fix this problem.

Now i am bet on CM team will do that.

cu

pOpY
[Galaxy S II General] :
in my eyes the main issue is the dual core cpu. I don't think that android is able to handle this correctly.

I use the same apps with the same settings on the latest 2.3.4 for the SGS 9000 the battery holds here up to 4 days, on the SGSII i got a maximum of 2,5 days depending when what sync or app is starting, because the battery drain here gets higher and higher on one battery charge. e.g. in the first night on standby you might have 0,5 - 1% per hour. on the second night on standby you will get 2% per hour when you are lucky.

so currently I would not buy the SGSII again. It might be a killer phone but currently it only kills your battery.
[Galaxy S II General] H377:
Gone 4eva

It's gone!!! Check this out:

http://xdaforums.com/showpost.php?p=15962733&postcount=127
[Galaxy S II General] no1ucare:
Just tried KG3 + SpeedMod SGS2 [K1-T8], I think it's gone just from the android battery usage statistics.. maybe cause of one of these:

- Disabled Android Debug Logger / logcat

- Disabled kernel debug and cpu stats

I tried it just for 30+ minutes, but while not having Android OS in the list of battery eaters (in the native statistics), those "suns of a beach" of suspend and events/0 were eating as systempanel found them. (and yes, the statistics of systempanel were empty before flashing SpeedMod.)

Cannot post on the other thread (need 10 posts and this is my first).
[Galaxy S II General] Dr.Sid:
I guess wait a bit longer.

Anyway .. yesterday I checked my battery stat about hour after unplugging. Phone was awake for 4 minutes. 'Display' task showed 4 minutes on. Display and screen stripes (under the graph) showed no overlap, ie no awake state with screen off. Still Android OS showed 24 minutes of running !
[Galaxy S II General] bibihest:
I'm manually syncing and still have problems.
[Galaxy S II General] H377:
I was happy for a while :)
[Galaxy S II General] da.trute:
mine went with Cognition KG2, still gone with cognition KG3
[Galaxy S II General] rassnik:
IT WORKS!

Here are my 2 cents:

there is a solution to this problem. i actually dont know it exactly, but mine works fine since a few days. really had plenty of AOS trouble, started thinking its a hardware issue (but in fact, its not!).

if everything is running fine Android OS % should be low, even when the phone is only in standby. look at this, after 8 hours of standby (starting with 96% battery)

these are my stats after 2 days (still starting with 96% of battery)

right now im running on DBT KF3 (updated with Kies), CWM 4.0.0.8 Kernel, rooted with Superoneclick.

I'm PERFECTLY happy now!

My suggestions / comments:

Dont use any battery analysis tools. I had no luck whenever I used them. Maybe these are preventing deep sleep

Let the phone shutdown itself when the battery is empty and load it full while turned off whenever possible

If the bug is gone, turning on WIFI doesnt cause drain (did here with 6% per hour, but that is gone with the bug!)

Android OS CPU time finally went down from 5-10 min/hour to less then 1 min/hour!

If you still think at some point (hopefully not too often) AOS is going crazy, kill the process with System Panel. Didnt happen for me since many days...

i recommend: Wipe the hell out of your phone and start clean without any sort of battery analysis tool****. use the loading procedure mentioned above (at least for the first chargings).

Good luck!
[Galaxy S II General] tshoulihane:
I just loaded SpeedMod K1-t8 on top of KE3 and CF-root. After 2:30, with the phone mostly in standby (9 min screen on) I'm at 95% battery, which I think is pretty much normal. So maybe Speedmod fixes the AOS idle bug, or maybe the other improvements make up for it.

I've not had the phone long enough to say how much of an improvement this is for me - my run times were more like 12-18 hours before, clearly 'something' wrong.