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[Q] P6210 random reboots

Hi,
Do you have any idea why my Tab Plus WIFI started to reboot randomly a few days ago?
It was not dropped, not installed/upgraded anything before, I do the same thing (reading web pages) on that. It doesn't depend on how much the battery is charged. It has the stock 3.2 firmware, and was never updated. I own this tablet since last summer and use daily without any problems.
I use the option "turn off wifi while sleep" since bought, but the reboot is related to the wake-up procedure. When I wake up the tablet from sleep, it starts working, finds wifi, but reboots in a minute. Not always, every 3-4th wake-ups, when wifi was slept (was in standby for >15mins). Not application dependent, it did reboot in youtube, simple settings menu and browser, too.
The only pattern in it is that waking up with wifi slept, and within 1 minute.
What can it be? Thanks in advance!

carlosmeldano said:
Hi,
The only pattern in it is that waking up with wifi slept, and within 1 minute.
Click to expand...
Click to collapse
It seems it's related to WIFI wake-up, because yesterday it just rebooted a few secs after turning on WIFI, and did it 3 times in a row (reboot-turn on-reboot...). But after it is turned on, it works like charm.
I don't know how it can happen, it never happened before, but happens 2-3 times a day since last week.
HW failure maybe? No software component was installed, changed or updated since weeks.

carlosmeldano said:
It seems it's related to WIFI wake-up, because yesterday it just rebooted a few secs after turning on WIFI, and did it 3 times in a row (reboot-turn on-reboot...). But after it is turned on, it works like charm.
I don't know how it can happen, it never happened before, but happens 2-3 times a day since last week.
HW failure maybe? No software component was installed, changed or updated since weeks.
Click to expand...
Click to collapse
Check Apps > Settings > Storage; you may be running out of available memory. If so, move some files off to your PC.

SaurusM3 said:
Check Apps > Settings > Storage; you may be running out of available memory. If so, move some files off to your PC.
Click to expand...
Click to collapse
400+ MB memory (always put into sleep w/o apps running) and 11+ GB free space.

Why not flash your firmware?
Sent from my GT-P6200 using XDA Premium HD app

theejay0625 said:
Why not flash your firmware?
Click to expand...
Click to collapse
I have no newer firmware than 3.2 in my region. And in fact, I don't need it as I only use this tablet for reading web pages and watching some youtube clips, nothing more.
What I don't understand is why an untouched system starts this random rebooting behavior. But as I see from replies, this is not a usual thing, so it might be a hardware issue.

Here's a post you may find helpful - http://androidforums.com/samsung-galaxy-tab-7-0-plus/556111-random-reboots.html

If it is because of the wifi sleep function.. why not turn that to never?
And just manually turn on and off your wifi..
Did you try that?
Sent from my GT-P6200 using XDA Premium HD app

theejay0625 said:
If it is because of the wifi sleep function.. why not turn that to never?
And just manually turn on and off your wifi..
Did you try that?
Click to expand...
Click to collapse
Wifi sleep policy was set to turn off when sleep. I read about this problem in 4.0.4 but never experienced it in 3.2. I use this tablet since last summer and never rebooted. But now, I'll try this trick and hope it will solve the problem. Thanks guys.

Wifi always on problem on Android lollipop 5.0.2 On htc one e8

I m using htc one e8 Indian version after I get update lollipop 5.0.2, I m facing wifi always on problem.
Battery stats and history shows always on, but in reality I hardly use wifi. But It shows a strong green bar that wifi is on all the time.
Wifi background scanning is also off, but I still not able to fix this.
Please help me to get rid of this.
Before lollipop update I was not facing this kind of problem.

rishabhchawla said:
I m using htc one e8 Indian version after I get update lollipop 5.0.2, I m facing wifi always on problem.
Battery stats and history shows always on, but in reality I hardly use wifi. But It shows a strong green bar that wifi is on all the time.
Wifi background scanning is also off, but I still not able to fix this.
Please help me to get rid of this.
Before lollipop update I was not facing this kind of problem.
Click to expand...
Click to collapse
I read on Elevate and xda only today, people owning M8 and M9 have seen a similar issue too last day. But I just saw my phone, and it's not there. I had patches of white too, for times when I wasn't on a wifi network. Try checking using a battery monitor app like GSAM, whether wifi is always on or not.

Battery history shows wifi is alaways on
Gsam app show wifi is not stwiched on at all. But Battery history shows wifi is on all the time. Problems that i m facing after lollipop update phone tends to heat more and battery life has also been degraded. So, where exactly problem is?

rishabhchawla said:
Gsam app show wifi is not stwiched on at all. But Battery history shows wifi is on all the time. Problems that i m facing after lollipop update phone tends to heat more and battery life has also been degraded. So, where exactly problem is?
Click to expand...
Click to collapse
Well, after any software update, it's recommended to wipe your phone's cache. Or software reset the phone. Then give the OS a few days to settle. I wiped the cache, and my battery life has been at par with on Kitkat, and even better standby times. And no heating problems. The performance has only improved after Lollipop. Try doing one of these, or check on GSAM what's eating up the battery.

rishabhchawla
do you use any IM apps like Viber etc? please check its wi-fi policy settings, it seems that it set to always on, try to change it and then reboot device

Viber was the culprit
Thanks man!
Just by changing wifi settings in wifi solved the problem like magic.

I am facing the same problem. I do not have viber installed on my phone.
I've set everything to off just as stated by the OP:
Here's how it goes with my E8:
1. Fresh start of the phone, and I don't find the traces of Wi-Fi.
2. Once Wi-Fi is on either for using internet/ShareIt/others, it keeps showing as "On" in Battery history even if it is turned "Off".
3. Only solution is to restart the phone.
Please advise guys!
Thanks,
Vinay

[Solved] Wifi always on problem on Android lollipop 5.0.2 On htc one e8
vinay.habib said:
I am facing the same problem. I do not have viber installed on my phone.
I've set everything to off just as stated by the OP:
Here's how it goes with my E8:
1. Fresh start of the phone, and I don't find the traces of Wi-Fi.
2. Once Wi-Fi is on either for using internet/ShareIt/others, it keeps showing as "On" in Battery history even if it is turned "Off".
3. Only solution is to restart the phone.
Please advise guys!
Thanks,
Vinay
Click to expand...
Click to collapse
I've found a way around it.
Turned on Wi-Fi and let the phone connect to a hotspot and turned it off after a few seconds.
The Wi-Fi radio completely turned off.
Guess, after using ShareIt, the app didn't turn it off the Wi-Fi properly.

[Q] wifi switches on and off

Hi,
since yesterday I have problem with wifi in my S7 (SM-G930F). It keeps turning on and off every second or two. I cannot switch it off because it keeps switching. I have rebooted my device, but it didn't help me. My phone is not rooted, it has stock 6.0.1 firmware. How to fix it? Despite it's impossible to use wifi now, it keeps draining my battery.
edit:
logs attached here: logs

duchian said:
Hi,
since yesterday I have problem with wifi in my S7 (SM-G930F). It keeps turning on and off every second or two. I cannot switch it off because it keeps switching. I have rebooted my device, but it didn't help me. My phone is not rooted, it has stock 6.0.1 firmware. How to fix it? Despite it's impossible to use wifi now, it keeps draining my battery.
edit:
logs attached here: logs
Click to expand...
Click to collapse
Boot to recovery and clear caches, reboot and see how it is then

done. Sadly, it didn't help me.
edit: I've just used this app but it also failed. If nothing help me I will wait till Monday to show it to my coleagues from Customer Support. Maybe they will find solution

duchian said:
done. Sadly, it didn't help me.
edit: I've just used this app but it also failed. If nothing help me I will wait till Monday to show it to my coleagues from Customer Support. Maybe they will find solution
Click to expand...
Click to collapse
I'd backup with smart switch, and factory reset the phone
Or flash the latest stock ROM over the top with ODIN

*Detection* said:
I'd backup with smart switch, and factory reset the phone
Or flash the latest stock ROM over the top with ODIN
Click to expand...
Click to collapse
I think it may be related with some strange wifi:
11-11 11:20:11.682 3462 3896 I WifiConfigStore: " Social WiFi" is a captive portal!
11-11 11:20:11.682 3462 3896 I WifiConfigStore: not authenticated yet
11-11 11:20:11.682 3462 3896 I WifiConfigStore: login url: "https://accounts.google.com/ServiceLogin?passive=1209600&continue=https://accounts.google.com/o/oauth2/auth?scope%3Dopenid%2Bemail%2Bprofile%26response_type%3Dcode%26state%3Dp6Vwdj6Gibz9wS9yez6dSfomZT3WiPZC%26redirect_uri%3Dhttps://socialwifi.com/social-auth/complete/google-oauth2/%26client_id%3D240279395513.apps.googleusercontent.com%26from_login%3D1%26as%3D-1601b637b91f0d80&oauth=1&sarp=1&scc=1#identifier"
Click to expand...
Click to collapse
I saw it yesterday at work, but not authenticated. Now it is remembered in list. Sadly S7 has no option to forget networks out of range. Todays we have national holidays, but on Monday I will be at work and try to forget this network. I do not want to change rom because rom from my operator has wifi calling enabled and it is awesome.

Is there any chance that WiFi scanning is turned on? I recently saw that WiFi scanning will briefly turn my WiFi on then off repeatedly (shows with an indicator on top and I hadn't noticed that before). This first showed up when I installed Android Auto since it turned on my WiFi scanning option by default. As soon as I turned WiFi scanning off, the WiFi worked as it had before. It may be worth a look.

I've run into the same issue. Started yesterday, which may have come with the latest PJG update... Not sure.
But it's rendered my phone pretty much useless. The constant toast message popping up, saying "Network connectivity is available" gets in the way of the keyboard and I can't type a damn thing!
Like you, I've found it's stuck with reboots and a factory reset, which makes me think it could be the firmware or modem.
Edit: Disabling WiFi Scanning stopped the errors. Root cause is still unknown, though. I've never had to disable that before...

crizyal said:
Is there any chance that WiFi scanning is turned on? I recently saw that WiFi scanning will briefly turn my WiFi on then off repeatedly (shows with an indicator on top and I hadn't noticed that before). This first showed up when I installed Android Auto since it turned on my WiFi scanning option by default. As soon as I turned WiFi scanning off, the WiFi worked as it had before. It may be worth a look.
Click to expand...
Click to collapse
Yep. It was turned on, but I have it enabled since I bought this phone. Turning off neutralized my problem, but why it was broken for last few days when I haven't done anything with my phone? I rely on this feature because of localization accuracy and disabling it is just temporary fix.
edit:
Guys, one more thing:
do you have "Samsung Gear" app installed? I think this app is forcing to enable and disable wifi. Under localization it shows battery usage as high and it was updated last week

duchian said:
Guys, one more thing:
do you have "Samsung Gear" app installed? I think this app is forcing to enable and disable wifi. Under localization it shows battery usage as high and it was updated last week
Click to expand...
Click to collapse
My phone does not have the Samsung Gear app installed. I do use Samsung Pay regularly and that was also updated (engine and app). I don't know how that would relate to WiFi though.

jimmy-bish said:
I've run into the same issue. Started yesterday, which may have come with the latest PJG update... Not sure.
But it's rendered my phone pretty much useless. The constant toast message popping up, saying "Network connectivity is available" gets in the way of the keyboard and I can't type a damn thing!
Like you, I've found it's stuck with reboots and a factory reset, which makes me think it could be the firmware or modem.
Edit: Disabling WiFi Scanning stopped the errors. Root cause is still unknown, though. I've never had to disable that before...
Click to expand...
Click to collapse
Turning off WiFi scanning stops the constant switching of WiFi. I tried removing the system settings permission from all the apps that had it (even the Google app) but it doesn't seem to have any effect.

I am seeing the same issue, I did not touch my screen in the following video
Video on Dropbox
disabling "Wi-Fi scanning" in location helps.

Hi,
I had the same issue before.
What I did was(Not sure how its displayed in english):
-Settings;
-Backup and Reset
-Reset network settings
I was having constant disconnections from wifi and it solved it.
Give it a try

DiogoCDS said:
Hi,
I had the same issue before.
What I did was(Not sure how its displayed in english):
-Settings;
-Backup and Reset
-Reset network settings
I was having constant disconnections from wifi and it solved it.
Give it a try
Click to expand...
Click to collapse
Did the above solve the problem?

I am using G930F in US on ATT and encountered the same problem in past few days, where wifi kept turning on and off. Was searching this post, and found out that if i turn off wifi scanning i can get wifi to stay off (when i switched off ) and wifi on (when switched to on) and not flip back and forth.
go to settings.
- click on search
- type in improve accuracy
- select from choice
- turn off wifi scanning
Try that and hope that helps.

I have the same problem. The side effect is that it will drain the battery really fast.
As others have mentioned, after I have turned off the WiFi scanning in the location setting the problem is temporarily gone. However it should not be the solution as I really need the WiFi location to work. I don't know what is causing the bug.
P. S. I only see this problem starting from the last week or so. I leave the WiFi scanning location function on since I have bought the phone in May. Mine is Exynos version.

several Samsung devices have this issue.
I and several others have it on a note 4, and some people have also reported having this problem on S6 variants.

The problem is Google Play Services 10.0.84 version. Another cell phones with this version of Google Play Services have the same problem (ej. Google Pixel phone) but not all.

The problem is the Android Wear App. Deinstall the app and wifi works perfekt.
This issue starts with the last update of the wear app.
Hope i could help you.

Gerry65 said:
The problem is the Android Wear App. Deinstall the app and wifi works perfekt.
This issue starts with the last update of the wear app.
Hope i could help you.
Click to expand...
Click to collapse
I tried uninstalling Android Wear but it didn't make a difference. The wifi kept switching on and off.

As mentioned above, it's Google Play Services 10.0.84. Just disable wifi scanning until there is an update. Hopefully google won't take too long to push a fix.

Hardtime with WhatsApp notifications!!!!

Dear users/developers,
I have a hard time using Whatsapp because of delayed notifications.
Before making this thread i have done a ton of research.
For example i deleted WhatsApp data many times, put WhatsApp in not optimized, uninstalled GMS Doze, i use PNF root for changing heartbeat time, i disabled AdAway, changed many ROMs (currently on Syberia).
Even when WhatsApp is open and phone is locked notification are delayed (So weird).
This is actually my last option starting this thread hopefully with some help to fix this issue.

I had this issue but it was related to wifi connection slowing down or even disconnecting when the phone was locked with screen off. My notificationsn would only appear after I turned the screen on.

scroll-lock said:
I had this issue but it was related to wifi connection slowing down or even disconnecting when the phone was locked with screen off. My notificationsn would only appear after I turned the screen on.
Click to expand...
Click to collapse
Well actually on wifi and data i have the same problem.. i have checked my wife and i have seen that the heartbeat time is set to 26min but i cant change this settings on wifi.
Im using BBS for battery stats and in 13 hours WhatsApp got 24 wake ups. Im considering also changing the carrier of my sim.
How did you solved this with wifi ?
Verstuurd vanaf mijn MI 5 met Tapatalk

ColdUser said:
Well actually on wifi and data i have the same problem.. i have checked my wife and i have seen that the heartbeat time is set to 26min but i cant change this settings on wifi.
Im using BBS for battery stats and in 13 hours WhatsApp got 24 wake ups. Im considering also changing the carrier of my sim.
How did you solved this with wifi ?
Verstuurd vanaf mijn MI 5 met Tapatalk
Click to expand...
Click to collapse
There was a setting to keep wi fi always on while the screen was off. I tried but I can't find it anymore with Oreo, this might be something that is not allowing the sync in background, do you experience this with any other app?
You could test if you put the phone to download something and turn the screen off for a while, see if the download slow down, stop or finish.

Yeah i just checked that out and no, wifi keeps running when phone is locked.
And actually it's only WhatsApp that i have problems with. Im using messenger, telegram and Tapatalk and im receiving all the notifications of it.
Im looking also for a ROM were i can set notifications to high priority.
I don't even remember when this started because i was done with it.

[Andromeda] Random battery drain / Phone staying awake

Anyone one else suffering with random battery drain / phone staying awake? See attachment.
Temporary fixes include include rebooting the phone, turning on battery saver mode & forcing 4G only but who really wants to do that? I believe its a kernel issue.
I'm running the latest EEA ROM, completely stock and unrooted. Any ideas how to resolve this? it isn't android system doing it.

Check your app autostarts. I bet they are all on. #softwareupdatefails
Sent from my MIX 3 using Tapatalk

PWn3R said:
Check your app autostarts. I bet they are all on. #softwareupdatefails
Sent from my MIX 3 using Tapatalk
Click to expand...
Click to collapse
None of them are on. aside of Nova and accubattery.

Interesting. Only other things I've seen on the regular Mix like that is Bluetooth draining battery when used. I've seen 20% in a couple hours from using a headset and listening to music.
You could try installing BBS and.see if it seems anything untword.
Sent from my MIX 3 using Tapatalk

Use BBS or GSAM Battery for seing what is draining battery. My bet is "GMS". You may root your phone and install magisk module "universal gms doze" or install link2sd, for example, and freeze almost all google services. I've done both and i do above 5 or 6 screen hours

acad.alex said:
Use BBS or GSAM Battery for seing what is draining battery. My bet is "GMS". You may root your phone and install magisk module "universal gms doze" or install link2sd, for example, and freeze almost all google services. I've done both and i do above 5 or 6 screen hours
Click to expand...
Click to collapse
It's such a big bug I don't understand why they don't do something about it already!
It's still continuing. I don't want to root my phone this is something that doesn't need root to fix
See attachment

I'm having the same problem. BUT , ONLY on WIFI got 2-3 days of use and 7-8 hours SOT !
I've tried BBS and actually I'm using GSam but nothing relevant found there. Just these days, on home enclosure I've noticed that if don't switch Wifi and Mobile Data the phone works perfectly and doesn't keep awake.
I have lot of Apps installed, NFC active, Wifi, location - GPS, Google apps, BT enabled with MiBand .. EVERYTHING ... (except 5G that is unavaliable with my actual operator) and in this conditions (only Wifi) , I have no issues on 15 days of use, so I suspect is Mobile Data related.
Maybe someone with more knowledgde can found an explanation and bring some help !!!
PD: I'm trying with Mobile Data again with 4G as preferred net , don't know if the system can swith it to 5G again ... driving to battery drainig. We'll see.

kme_kaiser said:
I'm having the same problem. BUT , ONLY on WIFI got 2-3 days of use and 7-8 hours SOT !
I've tried BBS and actually I'm using GSam but nothing relevant found there. Just these days, on home enclosure I've noticed that if don't switch Wifi and Mobile Data the phone works perfectly and doesn't keep awake.
I have lot of Apps installed, NFC active, Wifi, location - GPS, Google apps, BT enabled with MiBand .. EVERYTHING ... (except 5G that is unavaliable with my actual operator) and in this conditions (only Wifi) , I have no issues on 15 days of use, so I suspect is Mobile Data related.
Maybe someone with more knowledgde can found an explanation and bring some help !!!
PD: I'm trying with Mobile Data again with 4G as preferred net , don't know if the system can swith it to 5G again ... driving to battery drainig. We'll see.
Click to expand...
Click to collapse
i fixed mine by turning off gps.

toge64 said:
i fixed mine by turning off gps.
Click to expand...
Click to collapse
Thanks for the reply.
This doesn't work for me, I've been using GPS with no awake issues. The problem starts at certain time ramdomly even with GPS off.
Someone said something about clearing cache of Google Play Services, that worked for a couple of days but again the problem was there.
By now I'm trying the 4G solution, if the phone keeps the preferences for 4G not switching to 5G by itself (except on reboot) and then look if it doesn't keep awake without reason.

kme_kaiser said:
Thanks for the reply.
This doesn't work for me, I've been using GPS with no awake issues. The problem starts at certain time ramdomly even with GPS off.
Someone said something about clearing cache of Google Play Services, that worked for a couple of days but again the problem was there.
By now I'm trying the 4G solution, if the phone keeps the preferences for 4G not switching to 5G by itself (except on reboot) and then look if it doesn't keep awake without reason.
Click to expand...
Click to collapse
Did this work? I'm having the exact same issue. Massive battery drain overnight while phone is on airplane mode and absolutely nothing turned on (Wifi, Bluetooth, NFC, GPS all turned off) Not a single app has autostart permission. What can I do?