Develop Bugs

WiFi Scanning constantly

I have been having poor battery life since I got this device on launch day. I just noticed today that my Wifi is constantly scanning even though it is connected. I usually keep Wifi on most of the time since I have really slow 3g at home and the building I work in is like a concrete bunker built in the 1970s so nobody gets very good service in there.
Anybody else notice this?
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Yeah mine does this too but my battery life is still good.
Sent from my SPH-D710 using XDA App

this is also happening to me, and it is KILLING MY BATTERY!!!! really frustrating.

What do i look for to notice if its scanning constantly? is it the popup that comes up? with the networks that are in range?

i installed a free app called "watchdog lite", and it notifies me everytime my cpu usage goes over 50%, and at this time, i open watchdog, and it tells me "android system" is using 90%+ of the cpu... <<-- this happened EVERY 5 MINUTES when wifi is on. with wifi off, this only happened once in a while, maybe once every couple hours...
screenshow below: the critical battery drop happened when i turned on wifi, and CPU usage was going over 50% every other minute, and i restarted phone...
btw, this wifi issue does NOT happen when the phone is connected to a charger
Kikoshi said:
What do i look for to notice if its scanning constantly? is it the popup that comes up? with the networks that are in range?
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I've noticed this as well and I believe its also negatively impacting battery life. Its interesting that it would continue to scan while its connected.
Sent using Tapatalk on my Super EpicTouch 4G

I posted on this earlier this morning. My wifi also turns off after about 4 to 5 minutes. I can toggle it off then back on ever time but this can't be normal.

Vegasrich said:
I posted on this earlier this morning. My wifi also turns off after about 4 to 5 minutes. I can toggle it off then back on ever time but this can't be normal.
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Mine as well. Exchanged one for that reason and this one does it too.
The Evo3D Killer!!!

I'm hoping we get a fix for this soon.

Same here..
Sent from my SPH-D710 using XDA App

I see it now....damn never looked there actually. So is basically a bug.

Fixed yet?

I think multiple people (myself included) have confirmed that this was normal behavior - it scans constantly, yet there's no battery drain associated with it.
It seems that whenever you are on that Wifi settings page, it keep scanning constantly. But when you leave the page, it stops doing it that often (or at least doesn't drain the batter.)
You can check that by turning off wifi and still noticing big drain - which would indicate that wifi isn't the issue.
Now, there may also be a bug where this constant scanning actually continues. But like I said, it doesn't do it for everyone.

Use y5 battery saver from the market. It turns on and off with known networks and helps alot.
Sent from my SPH-D710 using xda premium

My wife's is doing this and it is definitely affecting battery. Viewing the battery graph, it does a decline of about 30 degrees with only 3G on and with wifi on it does a treacherous drop of about 50 degrees. I've actually told her to just leave 3G on all the time because it is easier on the battery. Hoping for a fix soon.

Mine scans a lot but doesn't hurt the battery. With moderate use im at 50% with 12 hours on.

Anyone else getting Wifi connecting and disconnecting about 5 to 10 minutes.

Vegasrich said:
Anyone else getting Wifi connecting and disconnecting about 5 to 10 minutes.
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Check your wifi sleep policy.
Samsung Galaxy S II

J-u-i-c-e d-e-f-e-n-d-e-r

If you want to try something, change WiFi Sleep Policy to *never*.
It seems counterintuitive, but the bug where Android system uses a lot of CPU uses much more power than setting WiFi Sleep Policy to never as the WiFi is using very little power when not transmitting data while Android system is just sucking up your battery with this bug.

[Q] Can someone take a look at my batterylog?

A couple of days ago I noticed my phone partying on my precious mAh's, it won't even last a full day anymore and even though it's being used quite alot I haven't changed my usage and still got a full day and more earlier.
I have auto-sync, wifi and 3g on constantly. But facebook sync is manual, other than that it's just skype(only when I'm logged in) and whatsapp and ofc google services. I think all Google's stuff uses push? I can't find any sync settings for that.
I should add that removing the widget was the first thing I did when I woke up so no actual usage is in the battery log. After that I checked tapatalk for 5 mins and put the phone down, after 20 min battery was down to 60% just like that...
I don't get why it uses around 40 mAh for a minute so often, at one point it was up to 162 mAh. And what the hell was it doing at the end? 60-100 mAh for a full hour? And only because I stopped it, could go on for alot longer I guess...

battery stats
Hi that is weird coz ur stats were excellent up till 8.20 ish, how about adding the 'Log running applications' setting in current widget to see what's turning on and draining ur battery.

Okay, I'll run another log tonight. Too bad the log gets like ten times harder to read with that option.
Sent from my Desire HD

u could see it urself aswell btw, in current widget, go to analyze log and select top processes, itll tell u what is draining sorted with the biggest power consumer. from ur earlier log standby should be at ~4ma and whatever is at the top is ur culprit. but post the results anyway just to be sure

I can't find that option? Anyway tonight it was a mess: EDIT I somehow didn't see the update in my apps...
The top of the list reads: com.cyanogenmod.cmparts(what's this?); gentle alarm(gotta have this...) and audiowidget(I don't even have the widget on a homescreen)
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CMparts is cyanogen settings,
audiowidget is the audio manager app -https://market.android.com/details?id=com.smartandroidapps.audiowidget&hl=en
u need to remember that android has a memory management system which doesnt shut apps down immediately and only suspends them, it does this for quick recalls of a recently used app. when the phone needs more memory for a bigger app it then kills of the oldest recently used app, to free ram. you can use the task manager to kill apps off manually but not recommended since it may or may not destabilize android itself.
As for the battery drain, its actually very good, u lost 1% per hour with all of those apps running. The spikes that happens is just the phone syncing background data such as facebook, foldersync, etc as well as standby apps such as viber and go launcher activating from when you actually waking the phone up from suspend.
Google does use push sync, if this bothers you u can shut it off from Settings > Privacy > untick backup my settings - note that this will wipe backed up data and application history from google servers and not ur phone - doing this wont wipe calendar or contacts as that belongs to gmail.
if u actually notice on current widget during idle the phone sits between 1mA to 5mA. this is the expected range, now say if u open facebook it should spike up, on mine this spikes up to ~263mA for a while till it finishes downloading.
Wifi is another cause as well, since it usually disconnects after a certain period unless u specify the wifi to never standby, it will use up power to scan for the signal every so often and then reconnect.
Apart from that ur battery consumption is excellent. you can expect to use the phone regularly (browsing, calls, etc) w/o charging for a couple of days.

Thanks for an excellent reply. The thing is it usually lasted a full day and with around 30% left. Now I need to charge it around 9 or 10 so it's a couple of hours short. I use my phone alot, about an hour of music, constant wifi, games, Tapatalk, browsing and lots of texting. I was actually surprised it lasted as long as it did and even if my battery life is good now it was alot better before.
I have noticed that sometimes, say I've just exited and game with 80% left. After five minutes it can go down to 70%, don't know if my indicator is failing or my battery is crazy.
Btw wifi policy is set to never.
Sent from my Desire HD

Battery Problems?

So i wake up and took my phone off the charger. I am at 100%, I use it for two hours, texting/facebook(a little)/instagram(a little) and had a 3 minute phone call. I have juice defender on and brightness all the way down. I am on DARKSIDE.EVOLUTION.3 [6.23.2012] [v7]. I lost 23 % in 2 hours. Something wrong here? Or is it just me? I get about 11 hours on my phone while at work, mind you, my phone is idle most of the time. No service for internet cause i am in a warehouse, so all i do is text if i am on my phone, but cant use it heavily. Yet my phone only lasts like 10-11 hours. Anyone can help? Thanks in advanced.

ixJay said:
So i wake up and took my phone off the charger. I am at 100%, I use it for two hours, texting/facebook(a little)/instagram(a little) and had a 3 minute phone call. I have juice defender on and brightness all the way down. I am on DARKSIDE.EVOLUTION.3 [6.23.2012] [v7]. I lost 23 % in 2 hours. Something wrong here? Or is it just me? I get about 11 hours on my phone while at work, mind you, my phone is idle most of the time. No service for internet cause i am in a warehouse, so all i do is text if i am on my phone, but cant use it heavily. Yet my phone only lasts like 10-11 hours. Anyone can help? Thanks in advanced.
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Yeah i had that same issue. First off, update to V8. Its smoother and you save a ton of battery. Turn governor to Badass setting with 384 as min (you can set max to whatever you want....kept mine at 1350).
Next turn off all automatic syncing for all apps....Facebook and GTalk is the biggest culprit of battery wasting. To be honest, you dont need automatic syncing for Facebook, mail, xda etc. another big killer of battery is loss of signal. I turn on airplane mode when i am going to be out of signal for a prolonged period of time. Oh and obviously...turn off wifi if you are not going to be connected. I also found widgets to be a source of alot of wakelocks which keeps the phone from sleeping properly and leads to battery waste.
Next part is up to you. I use a combo of GSam Battery Monitor, Better Battery Stats, CPU Spy, and CPU Sleeper.
-GSam Battery gives you a detailed breakdown of what is using your battery, how much, and tons of useful data including some wakelock data.
-Better Battery Stats gives you a detailed breakdown of detailed wakelocks. (you are aiming to get rid of the wakelocks associated with user apps, cant totally eliminate some but get them way down)
-CPU Spy gives you a detailed breakdown of CPU time in state and DEEP SLEEP
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I am still trying to figure out the calendar and maps wakelocks. CPU spy is not reset from yesterday(doesn't reset on complete charge or unplug yet. Manual resets only)

gps-lock draining battery

My phone's battery is draining really fast with minimal usage. Take a look at these battery usage screenshots:
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As you can see, the battery is pretty close to dying out after 11 hours with just 30 minutes of screen time. This definitely isn't right so I decided to look around. I haven't installed any suspicious apps and Android's battery usage stats are pretty unhelpful, but Better Battery Stats reveals the culprit: a gps-lock kernel wakelock.
While this wakelock is active, I've noticed that GPS apps don't work. None of the GPS apps show any GPS icon in the status bar and I don't seem to get any lock. The apps just fall back to the network location.
Turning the GPS or location services altogether off and on doesn't seem to help. Keeping the GPS off completely doesn't help either. A reboot does remove this wakelock... for a short while. Then it just pops up back again after a short while and doesn't clear unless I reboot.
I'm not sure where else I can look for the source and I could use some help.
I'm running stock 4.1.2 on a GSM Nexus.

Bogdan-xd said:
My phone's battery is draining really fast with minimal usage. Take a look at these battery usage screenshots:
As you can see, the battery is pretty close to dying out after 11 hours with just 30 minutes of screen time. This definitely isn't right so I decided to look around. I haven't installed any suspicious apps and Android's battery usage stats are pretty unhelpful, but Better Battery Stats reveals the culprit: a gps-lock kernel wakelock.
While this wakelock is active, I've noticed that GPS apps don't work. None of the GPS apps show any GPS icon in the status bar and I don't seem to get any lock. The apps just fall back to the network location.
Turning the GPS or location services altogether off and on doesn't seem to help. Keeping the GPS off completely doesn't help either. A reboot does remove this wakelock... for a short while. Then it just pops up back again after a short while and doesn't clear unless I reboot.
I'm not sure where else I can look for the source and I could use some help.
I'm running stock 4.1.2 on a GSM Nexus.
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Google Maps/Google Now any app that use gps is active and searching for your location.
Go the app info clear cache/data and force stop them.
Google Map is pretty the biggest drain.
post your partial wakelock as well that can help us determine what app are awake =)

Simply go to maps setting and remove check-in and other useless option
This gps-lock is caused from google now and maps that continue research for your position, but it's strange and abnormal, i've googlenow actived with all option, and i do 4 hours screen on with always 3g up

r29 said:
Google Maps/Google Now any app that use gps is active and searching for your location.
Go the app info clear cache/data and force stop them.
Google Map is pretty the biggest drain.
post your partial wakelock as well that can help us determine what app are awake =)
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I didn't take a screenshot of the partial wakelocks since there was nothing suspicious going on in there, but I can get one tomorrow if my battery drains again.
The biggest partial wakelocks usually come from AudioOut (if I listen to music), exchange sync, google backup, g+ sync and the like. Pretty much the same as on my Nexus 7, which doesn't have this crippling kernel wakelock.
Teezekel said:
Simply go to maps setting and remove check-in and other useless option
This gps-lock is caused from google now and maps that continue research for your position, but it's strange and abnormal, i've googlenow actived with all option, and i do 4 hours screen on with always 3g up
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Thanks. Suprisingly, I had location reporting turned on in Maps, though I don't remember ever turning it on.
Hope it helps, since before this started happening, I could get around 2 days of standby time with around 4 hours of screen time on a single charge.
Other than that, I don't think Google Now and the GPS lock that Maps tries to take every now and then are the culprits. I remember Maps trying to get random GPS fixes on my old Gingerbread phone with no significant effect on battery.

Had the same problem - thanks!!
I just wanted to say thank you to all of you - I had pretty much the same problem, and I think following this advice will take care of it for me. It was obvious from the screen captures that "something" was wrong, and searching through the log files for what had the largest percentage solved it for me (I think).

Solution
Simply install TopNTP from google play
and then install his gps options (choose what you prefer)
Problem for me gone after this, and also gps working faster
sry for necro-posting

BATTERY DRAIN FIX - Asus Zenfone 2 64gb ZE551 ML (ASUS_Z00AD) - MM - Stock - No Root

Dear Friends,
Short Read: Disable Asus Cover Application and Reboot.
Full Story:
I recently bought an Asus Zenfone2 as I needed a Dual SIM Dual Active phone. Last week I observed that battery was draining quite fast and phone was feeling warm too, which is definite hint to an issue. As I dug into Battery usage, I found that the phone was always Awake - obviously leading to fast battery drain.
I searched the net for a possible fix but could not find a concrete one. One thread suggested disabling selected Apps only in Auto Start Manager - but the screen to identify "Running Processes" is not there in Marshmallow.
So I started on my own and the plan was to disable everything possible and see if that fixes the issues. So I uninstalled many downloaded apps, disabled all preloaded apps (including Weather which provides clock on lock screen), disabled location, location scanning, blocked most notifications, and so forth. After I rebooted, to my joy, the device was cool and was not Awake all the time.
After that I slowly start enabling apps in batches, leaving the phone for some time and monitoring the Awake status. Over a period of 2 days I enabled back all the apps, kept location on (but location scanning off), enabled lock screen notifications. But the phone was still going to sleep and not Awake all the time. I was surprised as I wanted to identify the rogue app and here I was back will all apps and phone performing good with battery. On the third day, while I was playing around with settings trying to enable few more things, and it started again! I could feel the phone warmer in my pocket within minutes and the Battery Status showed that the phone was being Awake continuously. The only thing I had done was to enable "Show Status Bar" in lock screen, enable bluelight filter, and also started Themes and Asus Cover apps and closed. I reverted all the settings changed but phone was still all Awake. Then I stopped the Asus Cover App, disabled it, and rebooted. Now things were fine again!!
It seems that once your *start* Asus Cover app, it does some initial set up that starts keeping the phone Awake, even if you leave the check box to enable cover unchecked. May be it starts checking for magnetic proximity to make the phone sleep, and since I don't have Asus cover it was not going to sleep. So there seems to be some bug in this app.
So friends, this is my finding after two hard days of investigation. Please try if you are also suffering standby battery drain, with phone Awake all the time, and you don't have Asus Cover.
After the fix, here's how the battery drain looks like after 100% charging and then 1 hour of standby - only 1% battery drained!
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Kind Regards, Uttam

Thank you so much. I have searched and seen a lots of tries. Only your resolution gave a fix it seems.