yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] aydc:
Thank you for the anaylsis. My findings mirror your own. Android OS bug runs rampant on wifi. However, on 3G or HSDPA, it inflicts much less damage, so I keep the phone on 3G or nodata mode unless I want to download something big.

What's sad is, I have tried every kernel, every ROM here, including truly alternative things like Cyanogen nightlies. This bug is always there. So I think it lies in Samsung's drivers package, which is common on every kernel. Until Samsung rewrites the drivers, especially the WiFi driver, we'll never get rid of this.
[Galaxy S II General] ithehappy:
Disgrace

The fact is AOS bug is there, all time, sometime it's very prominent and sometimes not, doesn't really matter if there is any connectivity or not. Versatile bug to a versatile OS I guess. Don't like it.

Regards.
[Galaxy S II General] moevi:
This bug is getting really frustrating so I wouldn't mind ranting a bit about it.

This is my battery stats yesterday and the only thing I did was a couple of minutes of web browsing. (I'm using stock GB 2.3.3 KE7)
[Galaxy S II General] rocketpaul:
Not sure what to make of mine, i cant really tell if i have the bug or not
[Galaxy S II General] AndreiLux:
You don't. 12m over 10h30 and with Wifi on all the time is excellent...

Can you please share what you did to your ROM / versions and what settings you are using?
[Galaxy S II General] rocketpaul:
Villain 2.1 (kg2 base), Ninphetamine-2.0.1 kernel, kg3 modem. :)
[Galaxy S II General] Sp1tfire:
Well, from my testing Android OS bug is most likely related to wi-fi, at least on my phone. The whole story is this. Used my phone for about 3 weeks without ever connecting to a wi-fi network. Everything was fine Android OS never showed more than 7 % up to 10 %, phone being idle or in constant usage. Connected to the same wi-fi network for about 2 weeks Android OS stayed the same, nothing unusual. Finally arrived to my home place and connected my phone to my personal wi-fi router and fun began, Android OS started reaching even 50 % while being idle and up to 25 % when using the phone. So in my opinion it must be related to routers' brand/class. I gotta mention i had the same apps installed in my phone for the whole time, stock android 2.3.3, no root. That's my story. Believe it or not , it's up to you. It might be related to tons of other things, but that's my personal experience.
[Galaxy S II General] AndreiLux:
I just tried this via tethering my router via my laptop and using that as the access point via Connectify. Didn't change anything.
[Galaxy S II General] Sp1tfire:
Wish i knew what kind of router was used in the wi-fi connection that i connected to first time. Obviously Android OS went nuts after connecting to my personal router. Will try and see how the phone runs when i connect to the router at my office, cause it's a different brand. The only difference i can think of is on the first wi-fi network i was connecting 3-4 hours a day, while at home i'm always connected to my router, 12 hours a day average. Wonder if Android OS would decrease % if i use wi-fi connection less.
[Galaxy S II General] rassnik:
Even when it is the router - it could be fixed.

http://xdaforums.com/showpost.php?p=15968355&postcount=1286
[Galaxy S II General] Sleepycat3:
Great study. I would like to add that the Android OS process could be including anything non-app related. So if you have the market doing a background check to see if the apps are updated, then that could be showing under Android OS since the actual market app itself is not running. Same goes for your mail apps etc. I suspect that as long as there is background sync or notifications happening without the app in question running, then Android OS goes up.

Here is mine from last night before bed until now (10:19am). Running stock KG3 2.3.4 with CF-Root KG3 kernel. Don't mind the battery spikes and drops, I just cleared the battery stats last night.
[Galaxy S II General] Logi_Ca1:
Here's mine.

It was used heavily from 1 am to 3 am, with Dolphin HD and music playback. Then I was asleep from 3 am to 11 am, with the app "Sleep like a droid" on. It's an app that monitors your movement using the accelerometer to determine what phase of sleep you are in and thus the best time for the alarm to sound.

Wi-fi is on all the way.

Not sure if I suffer from the bug. AOS usage is little over 12%, although CPU time itself seems to be low.

ROM: Lite'ning 4.1

Kernel: Ninphetamine-2.0.2

Hope this helps!
[Galaxy S II General] Sleepycat3:
Percentage alone doesn't mean much. Just look at the CPU time. Yours is great, and you don't have the Android OS bug.
[Galaxy S II General] RogerPodacter:
i still am lost on this topic. in the original AOS bug thread, way back in the beginning it was determined that its a wifi related issue, and only on certain routers. i thought this was well accepted, so i dont understand all the confusion still regarding this.

i know i posted this previously and someone said it was only part of the issue. but i remember reading that it is ONLY related to wifi, and on certain model routers.
[Galaxy S II General] mix1987:
I am on Villainrom 2.3 for XXKG3 and Ninpo kernel v2.02 and setCPU to underclock and undervolt my phone. My batt can last me for 30 hours on light usage. AOS so far (10hrs of battery time at the time of writing) is 3%. Can it be the ROM that you are using?? Heard that ROMs, kernels and modems may contribute to the battery drain too.
[Galaxy S II General] mix1987:
Might be a modem issue??
[Galaxy S II General] manbearpig86:
As many people here I also used to have a drain of around 10% over 8 hours in the night when the phone was idle. I then rooted the phone, installed titanium backup pro and uninstalled all crapware. After much time of uninstalling, restoring apps I was finally able to achieve around 3% drain over 8 hours of idling..

I guess all of you should try removing unwanted applications and see how it goes.. I don't think I have the AOS bug now..

I know this solution has been said many times by many people.. Still It has helped me.. :)

BTW i am on stock 2.3.3
[Galaxy S II General] BarryH_GEG:
Bone stock (KF3), all syncs syncing, and Exchange push. Note the phone was on Wi-Fi all night.
[Galaxy S II General] JJEgan:
Try an overnight drain test with 100% battery and battery stats cleared .

Measure Android OS plus battery drain .

Repeat test exactly as above but with sim card removed .

jje
[Galaxy S II General] d3l1:
I think it's related to the apps installed and how they behave. Sure Sammys crapware is a big problem and freezing/uninstalling it will improve your battery life, but there are so many other apps that may hang and consume CPU or hang while syncing and that is imho the reason for the "Android OS" "Bug", put your phone in flight mode and there will hardly be any standby drain or notice of the "bug". it is related to wifi/mobile data and the problem can be the apps or the modem. but who knows, because everybody has configured the phone differently so there isn't really any basis for comparison.

People experiencing the "bug" should try to figure out each for themselves what the reason is:

- mobile data (fast dormancy, reception, signal strength, ...)

- wifi (signal strength, band used, ...)

- sync and what apps are syncing how often, because the sync doesn't show the app as active, so having push enabled in let's say K9 Mail will not show K9 Mail as "active" but it will increase/make us of the AndroidOS process.

If I'm mistaken please correct me, I'm not saying that I'm right, this is JUST my opinion/observation.

And, AndroidOS CPU time isn't the problem, it's HOW AndroidOS is used, not HOW LONG! I had AndroidOS using 1d2h and battery life was ok, another time I had 6h and it drained like hell producing those big drops you can see in the first post.
[Galaxy S II General] kbiz90:
Running Cognition 1.30 (2.3.4). WiFi on all night. Everything else off.
[Galaxy S II General] RogerPodacter:
i dont know or care what the problem is. my question is i thought the cause was well identified months ago. and that it was because of wifi with specific model routers, and samsung needs to fix the driver. so why do these threads keep popping up trying to figure out the cause? that's what i dont get. the cause is alredy identified months ago.
[Galaxy S II General] aydc:
It's not wifi. Sometimes I have wifi turned off all day and I still get the bug. It's not 3G either. I can reproduce the bug on Airplane Mode too. It's not 2.3.3 bug either, since 2.3.4 hasn't solved it. So, the cause is still unknown.
[Galaxy S II General] jonny68:
This is true the cause is still unknown,many different theories have been put forward some more realistic and "thought provoking" than others but the root cause hasn't been determined yet, i suspect it lies with Samsung.
[Galaxy S II General] d3l1:
haha, my battery drained although I had 10% Android OS (around 8 minutes) and was in flight mode, my battery graph doesn't show any activity or that my phone was awake during night, and I lost 30% (!!!) in 7 hours!!!

my display was off, the phone itself wasn't awake , just once and it drained 30% steadily (no sudden drops, just a steady fall) in 7 hours in flight mode!

what do you think now?

PS: a reboot seems to have fix it because now I have lost 5% in 2 hours with normal usage and sync and stuff.

no idea why the second picture is so small, tapatalk ****s it up, tried 3 times to upload it and always comes out the same way, sorry for that!
[Galaxy S II General] digitalH:
why some people the cpu usage is very hight and display almost nothing, and others the opposite ?

for exemple my displat is always around 70% of battery drain for 9% of CPU usage

Do you know why its different, and why my display use so much battery wherease some only got 7% of display ?
[Galaxy S II General] aydc:
High display usage is much better than low display usage, so your phone is working right. The display should be the biggest source of battery drain on the phone. If not, then a misbehaving software is draining the battery, which is much worse.
[Galaxy S II General] JPHCCFC:
Im monitoring the Android OS issue via system panel app. The two system process that seem to cause the issue are the suspend process and the events/0 process both of these take up the most CPU time. Any thoughts on what these processes do?
[Galaxy S II General] tshoulihane:
suspend is for going into low power state, at a guess, and events/0 maybe the wake-up. This supports the theory that sometimes a driver is flapping between hibernating, and being woken up. Maybe several drivers, maybe only when conditions conspire against them. What is likely is that once the OS gets into this state, it seems to get stuck.
[Galaxy S II General] kirdroid:
Attached is mine with Stock KG3 + speedmod T12 kernel
[Galaxy S II General] AndreiLux:
There is something weird about SpeedMod like I said in the first post. I'll definitely test it out thoroughly after I get to empty my current battery charge:

5h Android OS, 55m Display. Still having those cliff-like drops.
[Galaxy S II General] aydc:
I tested it and immediately went back to stock. It doesn't seem to have Android OS bug only because the dev disabled logging of kernel events. suspend and events/0 processes are still running wild in the background.
[Galaxy S II General] RogerPodacter:
Yes the suspend and event process were identified in the other thread as well.
[Galaxy S II General] ediflyer:
Even worse when no signal

I've found that my usage gets even worse when I'm in a no signal area, with masses of 'Awake' even though very little screen on. Have installed 'Better Battery Stats' in the hope it might help me get to the bottom of the problem!
[Galaxy S II General] Sleepycat3:
Same with the other phones out there including dumb-phones. When there is no signal, the phone is kept awake while it searches for a signal. The priority is to have a signal to take and make calls over longer battery life.
[Galaxy S II General] EarlZ:
Not really, its still about % if for 5days you only had a total screen time of 25mins then its gonna be lower then AOS/AS/Phone Idle.

But if you do have a display time of something like 3-5hrs and AOS is still higher then something is wrong, anything else IMHO is expected and normal.

EDIT:

When I look at the battery status with the phone idle, it almost always shows me that the time w/o signal is at 100% theres even no part of my house that has a signal lower than -81dBA, its usually -61dBA ~ 77dBA, Maybe this is also triggering the AOS bug?
[Galaxy S II General] bjorninge:
I have a constant 98% android OS usage on my phone. It drains the battery after about 18 hours of almost no use.. annoying. I am wondering if the battery is dead of if there are any faults in the OS or something..
[Galaxy S II General] jjs87:
I used my phone past 3 days without a 3G or wifi connection and just used GSM. What struck me is that normally i would need to recharge every night. I unplugged it fryday morning and as off now it still has 62% charge left (66 hours). Oke i didnt use the phone much just 1 hour screen on time and 5min of calling but still idle usage i have never seen so low it was on a avg of 10% per 24 hours including some usage)

3G is on now again (switched it on on 70%) and i of course that will use more in idle but i already see my usage graph go wonkey and noticed a big increase in AOS usage. I never use wifi and i to have the AOS bug from time to time. My guess is its a general problem and not just wifi related. And looking at my past experience it seems the bug is related to data connectivity.
[Galaxy S II General] AndreiLux:
How are we supposed to help you if you post no specific information at all?

What ROM are you on?

What Kernel are you on?

Modem?

What's running in the background?

Is your battery calibrated?

Did you clean the Samsung bloatware?

Yep, that's what I concluded too.

...

Anyway, here's the result of my recent light-use: Again only chatting on the phone and nothing else major. Funny **** is you can already guess when AOS kicks in in the graph and when it's not doing anything. :rolleyes: Still same settings as in the OP post.
[Galaxy S II General] JJEgan:
A couple of baseline test with clean phone no apps added just as it came from the factory . Wifi and GPS off overnight 11 hour sleep test.

Battery 100% stats reset .

Battery drain 2%

Cell Standby 46%

Phone Idle 34%

Android OS 11%

Further test with a number of apps installed .

Battery Drain 2%

Cell Standby 38%

Phone Idle 26%

Android OS 14%

Android System 2%

Android Core 2%

So a very acceptable 2% overnight roughly 1% battery drain per 6 hours on standby . Much the same as SGS1 .

Repeat these are tests on a clean phone for a baseline sleep drain figure nothing more .

jje
[Galaxy S II General] liuwenaz:
beautiful battery life, where is your AOS?
[Galaxy S II General] ediflyer:
I guess - although my old dumbphones used to go into a low power state just checking intermittently for network - I guess with all the apps on a smartphone each of them is looking for access. I've also had issues with the phone being in airplane mode and still having an appreciable battery drain (when it should really be pretty negligble, but I'll need to retest that). Either way it's not great - where I work you move in and out of reception and it'd nice if it coped with it a bit better!
[Galaxy S II General] jjs87:
total 2 hours 3 minutes screen on time.

After i turned on the data connection i went from 70% to 16% in 16 hours with 1 hour 20 minutes of actual use. Didnt have a AOS bug though this time...

Im on CM7 btw but i dont really notice any differences from stock, lightning or cm7. although on lightning i used to get the AOS bug more often.
[Galaxy S II General] tvergutz:
I solved it for mine

Although I have a galaxy S, I think the problem I had was the same,

My Android OS was always above 40%, when the phone was idle for a long time it got almost 90% of usage, and my battery life was like 12 to 18 hours.

So here is what I have done.

First I rotted the phone, and installed titanium backup, and uninstalled some junk that comes with the phone.

It didn't helped much, just a little, but it helps to keep your phone clean.

So I went further and installed "Android Assistant", went to tools and startup manager. I killed every User startup just because I don't need them all the time, and I killed some of the system startups too, I'll make here a list cause I don't know which one really did it, but after this my battery, if not much used, lasts almost 3 days. And the CPU usage off Android OS is like 10-20 min and normally below 10%.

So here is the list, let me know if this solve anyone's problem.

Know that the names might be a little different, cause mine is in Portuguese so maybe my translation can be a little different.

Systems startup to kill(just select to kill them).

- Partner configuration

- Configurations

- Samsung Account

- Factory test

- Gmail

- Maps

- Mobile Tracker

- Swype

I hope this could help somebody, cause that drainage sucks.;)
[Galaxy S II General] mchu6am4:
Thanks...will give it a go!
[Galaxy S II General] gammalerik:
And what is Android OS really? If someone out of one billion android owner know, this would be a good place to start.
[Galaxy S II General] androidkid311:
I believe it lies with samsung to. Never had no OS bug on my htc desire HD. Samsung is really crappy in the software/coding department lol. I dont think they know how to even fix it thats why you havent heard nothing from them. Does the galaxy nexus have this as well.. out of curiousity??

looks like an iphone but powered by android baby!!!!
[Galaxy S II General] spurs_e5:
Since a firmware update mine has got worse I am averaging 16hrs from a charge.
[Galaxy S II General] biffsmash:
My battery is on 60%, its on 14h 2m, 34% display on, 1 hour 48 min, 16% android os 30m, 11% Android System, 7m, Internet 11% and 17m, voice calls 10m.

Wifi been on since 9am, with gmail syncing and twitter syncing, Stock KL3 firmware.

Probably crap battery life, but it's ok for me, and more importantly, no os bug, at least, doesn't seem to be. Battery lasts twice or three times longer than my old HTC desire.

I'd say anyone with android os eating loads of battery has a dodgy app or service of some kind, probably caused by a custom rom.

Only time I see massive drops in battery like the side of a mountain slope, is when im on the internet browser.
[Galaxy S II General] htc9420:
^ +1 dis

KL1 FW stock, no Titanium Backup, Battery Optimizers, no gimmicks

Android OS 27% 2h 57min in 1 day.

Gracias Samsung
[Galaxy S II General] Entropy512:
Thread necromancy for the lose... Andrei has a MUCH better thread with analysis and troubleshooting of high-AOS drain elsewhere - http://xdaforums.com/showthread.php?t=1290020

If you had a firmware update that seems to have caused AOS problems, please post in that thread, and read the last 2-3 pages of it.

Useful information:

1) FULL release code of the previous firmware (e.g. XXKI3)

2) FULL release code of the new firmware (e.g. UCKL1 - suffix-only like "KL1" is kinda useless)

3) Read up on the diagnostic techniques in that thread.
[Galaxy S II General] stylez:
As Entropy states there is thread with more precise information locking thread to keep all info in one place.

Sent from the valley of the shadows....
[HTC Flyer, EVO View 4G] ElAguila:
I was thinking of attaching a tip on the opposite end of the scribe pen so that I can turn it backwards and use it as a touchscreen stylus. Any suggestions as to what would be the best item to use. I know on the ones I have seen in the stores the tip has a spongy bounce to them but the are a rubber material.
[HTC Flyer, EVO View 4G] kcchen:
Capacitive rubber comes in sheets or tubing. There's also capcitive foam, but it won't be as durable.

The trick is the adhesive, you need to male sure enough of the material touches the aluminum pen.

Or maybe plastic film protector for the screen, which seems to conduct electricity.
[HTC Flyer, EVO View 4G] ElAguila:
Thanks for the info. It is too bad they didn't fix the other end of the pen to be used as a regular stylus. If I find something that works I will post back here with it.
[HTC Flyer, EVO View 4G] steinerhippo:
I'm also looking for such a conductive rubber thing for the other end of the pen. I think a ideal solution would be a conductiv rubber tip or something similar which can be pulled over the end of the pen and sits tight (could easily be removed for battery changes). Unfortunately I haven't found such a thing til now.
[HTC Flyer, EVO View 4G] kcchen:
Someone at XDA did find a capacitive tip which they were able to stretch over the cap... I forget which user, but it was in one of the early threads. Maybe the wacom capacitive stylus would work, it looks like the proper diameter.
[HTC Flyer, EVO View 4G] SciFlyer:
Two suggestions

I have 3 (edit) suggestions

1. Buy a cheap stylus, cut off the capacitive head and afix it to the top of the HTC pen. I found these at $2.60 for three. You have 3 tries to get it right. :)

http://www.amazon.com/Universal-Touch-Screen-Stylus-Silver/dp/B002BBJMO6/ref=sr_1_1?ie=UTF8&qid=1311768442&sr=8-1

2. Ideally, if you can find a metal cap with a capacitive head that fits over the HTC Pen, you would have an elegant solution. If something like this fit, it would be great.

http://www.amazon.com/Engraved-Capacitive-Executive-Warranty-Metallic/dp/B004ZK8JLI/ref=pd_bxgy_e_img_c

I found this too: http://www.kickstarter.com/projects/1004382302/more-real-stylus-cap

edit #3. this just in... What about this touch tip? http://store01.prostores.com/servlet/truetip/Detail?no=48 - (edit #2) NOPE these are NOT capacitive caps. sorry

Maybe I'll experiment with my back up fujitsu pen.

hmmmm
[HTC Flyer, EVO View 4G] Rumur:
From the TrueTip website...

*TrueTip styli currently only work on resistive (pressure sensitive) touch screen devices.

Our styli do not work on an iPhone, Droid or similar conductive touch screen devices.

We hope to have a stylus solution for these devices soon - Please check back!*
[HTC Flyer, EVO View 4G] kcchen:
I have one of the 2-in-1 pens fory iPad and they do work... The problem is that you would be carrying two pens for your device, which is what this thread is trying to solve.

I briefly read that the Sharpie marker caps seem to fit the Scribe pen. They make a metal version of that marker, but then you're back to metal on glasss... But would probably be easier to wrap with plastic film.
[HTC Flyer, EVO View 4G] SciFlyer:
I am not sure I explained myself well. I meant if it fits, take the stylus cap off the 2 in 1 and put it on the flyer pen. Then you will be carrying one stylus that serves both functions.

HTC Flyer / Tapatalk
[HTC Flyer, EVO View 4G] kcchen:
Ok. So I should probably clarify, my pen 2-in-1 is the push button type which allows the tipto be retracted. :-)

I like the kickstart product... In your post.
[HD7 General] kentrey:
This is a near deal breaker for me. I travel across country and was gonna sell my Vibrant to a friend. Now I cant due to the fact that I download radio shows and podcasts while I travel. I downloaded the "Podcasts!" app but it doesnt have most of the stuff I listen to. Plus, when you listen to what you download with the app, you cant have it running in the background while you game or browse

I can stream but I lose service like every 100 miles because of Tmobile coverage. So I do my downloading in big cities.

And no torrent apps? Any chance of the Mango update solving my problem?
[HD7 General] Dr.8820:
Mango is going to address alot of those issues, and it was just officially released to manufacturers..just be patient :).

Sent from University Circle using XDA Windows Phone 7 App