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?
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

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?
Click to expand...
Click to collapse

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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.

Wifi on/off constantly in deep sleep

I've tried to search for something like this, but I haven't found anyone with this exact issue. I'm sorry of this has been posted before.
On to my problem, when the phone was new, everything worked as it should have, but a week ago or so, wifi wouldn't turn off during sleep for an unknown reason.
Yesterday I factory reset the phone and didn't have it to restore apps to troubleshoot, and now it looks like this :
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
why does this happen?
Everything stock, but if rooting could fix it, I'd do it in a heartbeat.

ph10m said:
I've tried to search for something like this, but I haven't found anyone with this exact issue. I'm sorry of this has been posted before.
On to my problem, when the phone was new, everything worked as it should have, but a week ago or so, wifi wouldn't turn off during sleep for an unknown reason.
Yesterday I factory reset the phone and didn't have it to restore apps to troubleshoot, and now it looks like this :
why does this happen?
Everything stock, but if rooting could fix it, I'd do it in a heartbeat.
Click to expand...
Click to collapse
change wifi sleep policy at settings.

If I had wifi set to always on I wouldn't really be asking a question, but I should have mentioned that. I've set it to never on during sleep and wifi power saving is also turned on.

ph10m said:
I've tried to search for something like this, but I haven't found anyone with this exact issue. I'm sorry of this has been posted before.
On to my problem, when the phone was new, everything worked as it should have, but a week ago or so, wifi wouldn't turn off during sleep for an unknown reason.
Yesterday I factory reset the phone and didn't have it to restore apps to troubleshoot, and now it looks like this :
Everything stock, but if rooting could fix it, I'd do it in a heartbeat.
Click to expand...
Click to collapse
ph10m said:
If I had wifi set to always on I wouldn't really be asking a question, but I should have mentioned that. I've set it to never on during sleep and wifi power saving is also turned on.
Click to expand...
Click to collapse
emmmm ofc wifi wont go sleep mode when you have set "never on during sleep"

The setting says "keep wifi on during sleep", whereas I've set it to never. If I had it set on "always" it'd be on during sleep. Not the other way around.
When I said "never on during sleep" how could you think that meant that wifi is always on during sleep? Jw.

ph10m said:
The setting says "keep wifi on during sleep", whereas I've set it to never. If I had it set on "always" it'd be on during sleep. Not the other way around.
When I said "never on during sleep" how could you think that meant that wifi is always on during sleep? Jw.
Click to expand...
Click to collapse
missunderstood, didnt have near me phone so didnt look at settings how it is called exactly. So then maybe you have some app or syncing enabled which wake up wifi randomly... just wondering

Yeah that's why I factory reset and left it overnight without any 3rd party apps or sync enabled.
I find it very weird and guess I'll just wait and see if anyone has experienced the same and figured it out!
Thanks for tuning in anyway.

If you look at wake and wi-fi on vs. screen on you can see something is constantly waking the phone which is causing it to then connect to wifi. This is a very annoying thing especially when it's still doing it after a factory reset. Depending though you may have some stock app, or account syncing that's waking the phone then it wakes and turns wifi on to use it. If you set up a Samsung Account, Google Account, or dropbox. Many of these have sync settings turned on by default. The Samsung Apps I believe also has it set to use push notifications and over wifi turned on by default. I believe dropbox if logged into also by default is set to auto sync pictures and video with your phone. If you happen to have Facebook it's always running, and by default is set to check for updates every hour. I see you must have GPS enabled for the fact that it at least used it once. It seems like if you have location reporting checked or whatever about wifi networks Google loves to CONSTANTLY do the location collecting. Also if you have your device set to backup with Google it's something that was definitely waking my phone over night a lot more than it needed to be. Also check you maps settings for location reporting/check in stuff. If you've never turned it off it likes to be on by default.

Thanks for all this info, I'm sure I disabled sync options but there might be something left. I'll try this and report after I've left it on tonight! Thanks again

ph10m said:
Thanks for all this info, I'm sure I disabled sync options but there might be something left. I'll try this and report after I've left it on tonight! Thanks again
Click to expand...
Click to collapse
Here is an Xposed mod that fixes the issue (unfortunately, KitKat only for now): http://forum.xda-developers.com/xposed/modules/mod-wi-fi-deep-sleep-t2752947

Hello, I have exactly the same problem on my cink peax. Unfortunately I'm not on KitKat so I cannot try the exposed module. I think some apps wake the phone even when you disable notification. (Facebook, some Google apps also). I tried greenify, it's better now but I still have the problem. So I hope to find a solution.
EDIT : I tried deep sleep battery saver this afternoon and associated with greenify I was able to cut WiFi when in deep sleep mode.

msm_hsic_host wakelock

{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
A great explanation of the msm_hsic_host wakelock issue by "thracemerin" on the xda-dev forum
I didnt understand the issue previously, but this sheds light on it for me.. http://forum.xda-developers.com/showthread.php?t=2155461
"The msm_hsic_host wakelock is because the 3G modem is connected to the phone as an external USB device controlled by the hsic host controller. When the modem wakes up for any reason (apps sync, location, tower ping, etc...) the wakelock is requested. The problem is that the hsic host controller doesn't go back into suspend mode properly, this is a problem with the kernel. The result is that because the hsic host controller isn't asleep the phone wont enter deep sleep while it waits for the hsic host to suspend.
There is the additional issue that if your signal is poor the operations that caused the wakelock in the first place take longer to complete thus lengthening the time the wakelock is held.
The issue is significantly reduced on WiFi for obvious reasons, all the data is transmitted via WiFi so the 3G modem doesn't need to wake up nearly as often, it still wakes up to deal with tower checks and that sort of thing to ensure that it has voice connectivity, but those events are much rarer.
There are kernels available that attempt to solve this problem, Harsh kernel as suggested by another user has fixes in it along with a lot of other changes, the fixed kernel I'm working on is stock with these changes as well, either should help, it's not possible to eliminate this wakelock completely without shutting down the 3G modem which would of course prevent data and voice use of the phone, but they will reduce the wakelock and may help with your battery life."
http://www.reddit.com/r/nexus4/comments/199bd3/a_great_explanation_of_the_msm_hsic_host_wakelock/
So? How Sony will handle this?

I thought this was already fixed by Google in mainline kernel, this issue is pretty old one.
Remember, this wakelock is not possible to eliminate completely, it's pretty much the synonym to your phone receiving/transmitting any kind of network traffic over 3G. And lot of apps cause regular incoming packets each of which will wake up the phone. That's why to big extent Sony introduced Stamina mode.

Well for me it was busy for 21m8sec on 5h29h of idling. Phone was on WIFI all the time.

Phone was on Wi-Fi, but you don't have Wi-Fi set to be on only when screen on do you? Also, maybe you've enabled "use only good Wi-Fi connections?" As for myself I see noticeable time in this wakelock only when away from Wi-Fi

Ingvarr said:
Phone was on Wi-Fi, but you don't have Wi-Fi set to be on only when screen on do you? Also, maybe you've enabled "use only good Wi-Fi connections?" As for myself I see noticeable time in this wakelock only when away from Wi-Fi
Click to expand...
Click to collapse
For me wifi is always on and "use only good wifi connections" is OFF

DoubleYouPee said:
For me wifi is always on and "use only good wifi connections" is OFF
Click to expand...
Click to collapse
Try switching mobile data off completely.
Maybe your operator sending you ping packets regularly or something like that.

Ingvarr said:
Try switching mobile data off completely.
Maybe your operator sending you ping packets regularly or something like that.
Click to expand...
Click to collapse
Well it is off when wifi is on....right? Turning the option off shouldn't make a difference

DoubleYouPee said:
Well it is off when wifi is on....right? Turning the option off shouldn't make a difference
Click to expand...
Click to collapse
Just try it out.
Also, if you have Google Now on, switch it off.

Check out wake lock time ratio... My battery is getting killed I run stock 4.3.

Uhm... I've updated my kernel with the latest release from Ziddey (which uses Franco's as a base and adds USB OTG support).
After that I noticed this problem. I've noticed it in the past and fixed it by reflashing a previous version, so I restored a previous kernel but the problem remained.
So, in an attempt to understand what was causing the problem I reinstalled the latest kernel again, only this time not fixing the permissions after flashing it. The problem seemed to be gone. I realized that every time I've had the problem in the past it was after fixing the permissions in TWRP (it asks if I want to fix permissions before reboot every time I flash a new kernel).
Could it be only a weird coincidence?
BTW, I usually never fixed the permissions because I thought it was a TWRP bug/mistake.
I'm doing some tests right now.
[EDIT] P.S. I know it's unlikely that's the culprit of the problem... But...

Hi. I bought this phone for my wife a few years back and recently she told me her battery was draining so I installed Better Battery Stats and found out the same wakelock issue in this post. She is using latest stock rom and the issue happens even if on wifi. I can't seem to find any other information about this issue. Any ideas?
BTW, sorry for necro.

Sudden Major battery drain on Note 4!

I took my note 4 off the charger this morning and used it for about 1.5 hours (no videos, just tapatalk and Web browsing) , and the battery went down to 73%. During this time I also noticed that my wifi toggle was turning off and on for no reason. I don't have smart network control check on.
Then I went about my day and set my phone down, asleep, and didn't touch it. At 11am I hear the "low battery" beep. I go over to my phone and it's at 5%!
My battery has never been this bad before, and this just started today with no app changes. As I'm typing this, my phone went from 20% to 16%.
Is anyone else experiencing this issue (both wifi toggling and battery issue) and know a fix? I've attached my battery graph from today.
Edit: It looks like the phone was "awake" all day today except for the time it turned off due to low battery. Also, it looks like Bluetooth is using way more battery than it should be.
Thanks!
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Sent from my SM-N910V using Tapatalk

ireknole said:
I took my note 4 off the charger this morning and used it for about 1.5 hours (no videos, just tapatalk and Web browsing) , and the battery went down to 73%. During this time I also noticed that my wifi toggle was turning off and on for no reason. I don't have smart network control check on.
Then I went about my day and set my phone down, asleep, and didn't touch it. At 11am I hear the "low battery" beep. I go over to my phone and it's at 5%!
My battery has never been this bad before, and this just started today with no app changes. As I'm typing this, my phone went from 20% to 16%.
Is anyone else experiencing this issue (both wifi toggling and battery issue) and know a fix? I've attached my battery graph from today.
Edit: It looks like the phone was "awake" all day today except for the time it turned off due to low battery. Also, it looks like Bluetooth is using way more battery than it should be.
Thanks! View attachment 3511266
Sent from my SM-N910V using Tapatalk
Click to expand...
Click to collapse
So I found the culprit for the wifi. I have a tasker profile that turns it off when I'm not connected via Bluetooth to my house phone. This means that there is something wrong with my Bluetooth. Nothing has changed with my house phones. Any ideas on the Bluetooth?
Sent from my SM-N910V using Tapatalk

ireknole said:
So I found the culprit for the wifi. I have a tasker profile that turns it off when I'm not connected via Bluetooth to my house phone. This means that there is something wrong with my Bluetooth. Nothing has changed with my house phones. Any ideas on the Bluetooth?
Sent from my SM-N910V using Tapatalk
Click to expand...
Click to collapse
Try getting rid of the Tasker profile. I don't think it's your phone. I bought Tasker and tried to set up some cool stuff but it kept messing things up. I don't use it any more. Android does a pretty good job of taking care of stuff without it.

stueycaster said:
Try getting rid of the Tasker profile. I don't think it's your phone. I bought Tasker and tried to set up some cool stuff but it kept messing things up. I don't use it any more. Android does a pretty good job of taking care of stuff without it.
Click to expand...
Click to collapse
Thanks that was actually the first thing I did when I found out it was a tasker problem. I don't keep wifi on all the time due to battery drain (unless I'm mistaken on that?) so I'll have to bring it back eventually. I didn't think android had a "turn wifi toggle on when home" ability.
I unpaired my house phones and I'm going to repair them tonight and see if that helps.
Sent from my SM-N910V using Tapatalk

Lollipop doesn't let you toggle Wi-Fi with Tasker anymore w/o root access.
Sent from my SM-N910V using XDA Free mobile app

RedsonRising said:
Lollipop doesn't let you toggle Wi-Fi with Tasker anymore w/o root access.
Sent from my SM-N910V using XDA Free mobile app
Click to expand...
Click to collapse
You can still toggle wifi. It's gps that you can't toggle without root.
Sent from my SM-N910V using Tapatalk

I've had this happen to me twice including just now hence why I searched for posts on this. Seems like it happens randomly when I stop using WiFi hotspot and I'm at home with my WiFi automatically trying to turn on. I use wifimatic which turns WiFi on when I'm near a cell tower near my home and shuts off when out of range of that tower. My WiFi won't automatically connect if I turn off my Hotspot, so I have to restart. Just twice now this drained my battery from like 30 to 0 in less than a minute. It's not often it happens and I'm home anyhow so putting it on the charger isn't a problem. Maybe this helps but maybe not.

It's been my experience that leaving wifi on doesn't drain the battery very much. I leave mine on. Besides, the quick toggle is very easy to use. Trying to automate it is more trouble.
Sent from my SM-N910V DE w/MoRom

Wifi Battery Problem

Hey guys,
I have following problem with wifi:
If I turn off my wifi in settings it still drains battery in the battery stats. Also when I turn on airplane mode the active wifi line has no gaps in battery stats. I turned off wifi scanning and searched for all apps that have permission to wifi and uninstalled them. But still I could not turn switch off wifi completely. The only way to turn off the wifi battery drain is to turn off wifi in settings and reboot the phone. However, when I turn on wifi after the reboot I can not switch it off again.
So since I could not find the reason what cause wifi to always stay active even when I turned it off I made a factory reset. But the problem was still there. Next I updated my stock OxygenOS 3.1.2 to the newest 3.1.3 version but still have the same behaviour.
Do you also have an always active wifi in battery stat? Is this a software or hardware bug and is there a fix or an app to manually kill wifi completely?

I have not experienced any such issue in my 4 days of use.

Good to hear. I really dont know what causes wifi to always stay on in Battery Stats. I read in forums of other devices that they also have this issue. Since it could be a Marshmallow related bug. But I haven't found a solution that worked for me. Do you know an app to analyze wifi to see if it is really on or if it scans in background. Or to see which app uses wifi at the moment?
Sent from my ONEPLUS A3003 using XDA-Developers mobile app

This is my logcat output if I turn off wifi:
http://pastebin.com/eircQhHc
Does it really get switched off completely?

Try going to Settings > Wifi > Advanced > Keep Wi-Fi on during sleep set to Never
Sent from my ONEPLUS A3000 using XDA-Developers mobile app

Thank you for your advice. I already tested it but did it again with wifi turned off in settings. Turned off the screen for almost 2 hours. But still I do not get any gaps in the wifi active line in battery stats.
Sent from my ONEPLUS A3003 using XDA-Developers mobile app

breaxta said:
Hey guys,
I have following problem with wifi:
If I turn off my wifi in settings it still drains battery in the battery stats. Also when I turn on airplane mode the active wifi line has no gaps in battery stats. I turned off wifi scanning and searched for all apps that have permission to wifi and uninstalled them. But still I could not turn switch off wifi completely. The only way to turn off the wifi battery drain is to turn off wifi in settings and reboot the phone. However, when I turn on wifi after the reboot I can not switch it off again.
So since I could not find the reason what cause wifi to always stay active even when I turned it off I made a factory reset. But the problem was still there. Next I updated my stock OxygenOS 3.1.2 to the newest 3.1.3 version but still have the same behaviour.
Do you also have an always active wifi in battery stat? Is this a software or hardware bug and is there a fix or an app to manually kill wifi completely?
Click to expand...
Click to collapse
Go to settings- back up and reset- turn off backup my data.
Restart ur device. This helped me turning my wifi off.

Thanks. I already had disabled the backup option. And still my wifi did not turn off correctly in battery stats.
But today I found out that when I am connected to a wifi and then switch off wifi it turns off as expected and the active line in battery stats stops immediately. However when I leave the connected wifi area and then switch off wifi without a connection it stays active in battery stats. Can someone reproduce this behaviour?
Sent from my ONEPLUS A3003 using XDA-Developers mobile app

breaxta said:
Thanks. I already had disabled the backup option. And still my wifi did not turn off correctly in battery stats.
But today I found out that when I am connected to a wifi and then switch off wifi it turns off as expected and the active line in battery stats stops immediately. However when I leaf the connected wifi area and then switch off wifi without a connection it stays active in battery stats. Can someone reproduce this behaviour?
Sent from my ONEPLUS A3003 using XDA-Developers mobile app
Click to expand...
Click to collapse
Yes I have the same bug.
I've had this problem with my Oneplus One since Lollipop and again with Oneplus 3. No matter what rom, this issue has always been present. I've never really found the reason for it.
I believe it is just a bug in reporting the battery stats since I haven't faced any serious battery drain as such. I have also read few people saying it could be an app that is keeping wifi active all the time. I'll try to test this.

viralbug said:
Yes I have the same bug.
I've had this problem with my Oneplus One since Lollipop and again with Oneplus 3. No matter what rom, this issue has always been present. I've never really found the reason for it.
I believe it is just a bug in reporting the battery stats since I haven't faced any serious battery drain as such. I have also read few people saying it could be an app that is keeping wifi active all the time. I'll try to test this.
Click to expand...
Click to collapse
Yes that seems to be the problem. If an app causes the problem. It has to be one of the pre-installed apps, since this also happens after a factory reset. Unfortunately it is not possible to revoke the "connect and disconnect Wi-Fi" permission in settings.

breaxta said:
Yes that seems to be the problem. If an app causes the problem. It has to be one of the pre-installed apps, since this also happens after a factory reset. Unfortunately it is not possible to revoke the "connect and disconnect Wi-Fi" permission in settings.
Click to expand...
Click to collapse
Like I said it is mostly a reporting error in stats. Install GSAM Battery Monitor and check what it shows.
Though default battery stats show wifi to be constantly on (even when phone was turned off!) , GSAM correctly shows wifi as turned off.
I think you can ignore this bug and use your phone normally. I've been doing the same since a long time now lol.

Phone off but Wifi On ?!
Something similar happened to me last night. The phone was in my pocket the whole time. I am on 3.1.2 stock.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

İt is the advanced location mode where phone can use wifi and bluetooth aswell. Just type wifi in settings searchbox scroll doen till you see a line related to location. And thats all you can turn it off there. The thing that bugs me more is that wifi is very weak. And dont say no because you got some sort of nuclear fallout router. İf you compare it to other devices and go to an area where you have barely wifi you will see what i mean. İts a shame