Develop Bugs

[Q] Wifi occasionally disconnecting in standby

So I've had this problem for awhile now with the wifi disconnecting itself during standby. The other day I decided to start fresh and went did a complete wipe and reflashed CM (10.1 RC).
The problem did not present itself during the 1st or 2nd day, however yesterday I noticed the wifi signal bar went grey for a second and reconnected. So I checked my radio version and noticed it was a few months behind, downloaded the latest and flashed it. Problem didn't show up until the next day where the wifi signal briefly turned grey and reconnected.
Wifi settings are set to always stay on when screen is off and I've tried almost every combo of settings in the wifi menu to stop it. This is fairly annoying since when I have wifi turned on I do not get texts since I use GV. Yes, I can turn off wifi and use my phone's internet, but I have bad signal here and the speeds are extremely slow.
I'm not sure what the problem could be, I always thought it was a bad flash the first time I did it and it was a bug. I thought wiping everything and flashing an RC would fix the problems.
Any thoughts on what could be causing it? I'm on stock CM with no custom kernels.

All wifi and data disconnects when screen is off but only below 50% battery?

Hey guys I have searched and searched for a remedy for my problem, first off here is what I am running on my i9250:
ROM: Beanstalk 1.190
Kernel: KUBO-AK r46
Baseband: I9250UGLL1
Now the problem is this, all data (wifi and cell data) randomly disconnects when my battery is anywhere lower than 50% and gets increasingly annoying the lower it gets. I do not have any powersaving features enabled and yes I have changed the advanced settings in Wifi (Keep wifi on during sleep: checked to Always, Avoid poor connections: Unchecked, wifi freq band: 2.4ghz only, wifi optimization: unchecked; i guess that is a powersaving feature as well)
Still the problem persists. The other problem is, it happens to my cell data as well, when I wake the phone up (when it is under 50% or so) I see that only then the cell data starts to reconnect, and then I get all my whatsapp messages and emails all at once. (same goes with the wifi) Keep in mind though, when I have the phone plugged in and charging the wfi or cell data are active when the screen is switched off. The problem only occurs when the battery is below 50%.
Is there anything I can do about this, it gets really annoying because I have to wake the phone up and keep the screen on, in order to get messages. I know there is a widget that keeps the wifi active regardless of the battery level, but what about the phone data when I am out and about. I need to stay connected especially with emails and whatsapp because that is how clients stay in contact with me and it sucks when they send messages and I get nothing and they have to wait for me to check or wake up my phone for the data connection to re-establish whether it be on wifi or data.
Anyone knows how to fix this problem?

No one?

Have you tried changing your kernel? Sometime kernels can have weird affects on your device.

İ think this is one of kernel problems. Battery section is controlling by kernel. Find a kernel and use smartassv2 with sio.

Yes, I swapped around a few kernels and same effect. I really am at a loss.

amd-dude said:
Yes, I swapped around a few kernels and same effect. I really am at a loss.
Click to expand...
Click to collapse
it happens to me as well, not sure about the 50%, but when I am at home with 3G and wifi on very often if i turn on the phone the signal bars are grey and not blue and it seems that connectionwas lost during sleep and is being turned on again
btw, I am on stock 4.2.2

Try to format /system. And reflash. İf its not work, flash stock rom and flash custom rom. İm not sure if it will work.

Believe me, I have tried every wipe and every rom/kernel combo that is humanly possible

Then problem is hardware thats what I thought. Unfortunately. Technical support helps.

Wifi on leads to excessive heat.

Recently upgraded and re-rooted and seemly after an update to G3 tweak box keeping the wifi on destroys my battery and heats the device off.
Better battery stats states that the sensors.qcom have been going forever.
Work around for now is to use the device without the wifi on. Thankfully I have unlimited data, but this is kinda annoying.
Any help would be much appreciated.

In my case, once I turn on Wi-Fi, not only the top back part of the device starts heating up, also the phone becomes laggy and buggy. For instance, clicking Quiet mode icon doesn't actually turn it on/off. Additionally, my text messages stop sending/receiving for some time (up to hours!). What I've noticed is that my LTE icon with arrows lighting up appears for a few seconds, then goes away, then reappears, and the cycle continues. I can confirm that my WiFi internet works though, since if I disable mobile data, I am still able to access the internet.
Playing with advanced WiFi options, and removing all saved networks did not help. Having WiFi on, but not connected to any network, is fine and doesn't cause any of the above.
I kept the WiFi off during the weekend (good 2-3 days), and everything was cool and smooth! But I can't just not use WiFi; it's not efficient and I used ~1.5GB of data.
A friend of mine said their colleague experienced the same. He did a factory reset and everything is good. I have not yet had the time to try that myself.

ryceone said:
Recently upgraded and re-rooted and seemly after an update to G3 tweak box keeping the wifi on destroys my battery and heats the device off.
Better battery stats states that the sensors.qcom have been going forever.
Work around for now is to use the device without the wifi on. Thankfully I have unlimited data, but this is kinda annoying.
Any help would be much appreciated.
Click to expand...
Click to collapse
sinara said:
In my case, once I turn on Wi-Fi, not only the top back part of the device starts heating up, also the phone becomes laggy and buggy. For instance, clicking Quiet mode icon doesn't actually turn it on/off. Additionally, my text messages stop sending/receiving for some time (up to hours!). What I've noticed is that my LTE icon with arrows lighting up appears for a few seconds, then goes away, then reappears, and the cycle continues. I can confirm that my WiFi internet works though, since if I disable mobile data, I am still able to access the internet.
Playing with advanced WiFi options, and removing all saved networks did not help. Having WiFi on, but not connected to any network, is fine and doesn't cause any of the above.
I kept the WiFi off during the weekend (good 2-3 days), and everything was cool and smooth! But I can't just not use WiFi; it's not efficient and I used ~1.5GB of data.
A friend of mine said their colleague experienced the same. He did a factory reset and everything is good. I have not yet had the time to try that myself.
Click to expand...
Click to collapse
try dissabling location services

suljo94 said:
try dissabling location services
Click to expand...
Click to collapse
Are you referring to "Allow Wi-Fi scanning" under Advanced Wi-Fi settings or the Location Services in general?

sinara said:
Are you referring to "Allow Wi-Fi scanning" under Advanced Wi-Fi settings or the Location Services in general?
Click to expand...
Click to collapse
Both actually

suljo94 said:
Both actually
Click to expand...
Click to collapse
Tried, but issue still persists.
I am going to backup my data, and proceed with a hard (factory) reset. Hopefully it will be resolved, if not I have to look into getting a replacement (which would be a whole different issue to deal with).

sinara said:
Tried, but issue still persists.
I am going to backup my data, and proceed with a hard (factory) reset. Hopefully it will be resolved, if not I have to look into getting a replacement (which would be a whole different issue to deal with).
Click to expand...
Click to collapse
that won't help because this is probably just a rogue app a hard reset might fix this if not try an 10j firmware

suljo94 said:
that won't help because this is probably just a rogue app a hard reset might fix this if not try an 10j firmware
Click to expand...
Click to collapse
Hard reset seems to have fixed it for now! *knock on wood* And I've been paying careful attention to the apps, installing things in stages.

sinara said:
Hard reset seems to have fixed it for now! *knock on wood* And I've been paying careful attention to the apps, installing things in stages.
Click to expand...
Click to collapse
smart, keep us posted

sinara said:
Hard reset seems to have fixed it for now! *knock on wood* And I've been paying careful attention to the apps, installing things in stages.
Click to expand...
Click to collapse
What is your signal strength on Wifi? Mine does seem to heat up considerably on Less than optimal signal strengths.
Mine has been recently returned to stock and wiped, in advance of me RMAing it because I have the "cracks" developing at mic and infrared ports.

Tweakecho said:
What is your signal strength on Wifi? Mine does seem to heat up considerably on Less than optimal signal strengths.
Mine has been recently returned to stock and wiped, in advance of me RMAing it because I have the "cracks" developing at mic and infrared ports.
Click to expand...
Click to collapse
Signal strength was almost full. It still heats up with a lot of use, which is understandable. Definitely not as excessively as before (when I wasn't doing anything and it was heating up).
I didn't play with any of the advanced Wi-Fi settings (did not change them from the default), except for removing the checkmark of notifications of open networks.
No signs of cracks on mine, and I am not using a case currently (it is being shipped to me).

suljo94 said:
smart, keep us posted
Click to expand...
Click to collapse
Just an update:
No issues with WiFi yet. Some heat during heavy use, but nothing like before (in terms of heat and lag).
LTE symbol sometimes appears even when on WiFi, but definitely not as much as it used to. I think it started doing that once I installed Rogers' VVM Plus app (seems like it needs to communicate with the server directly or something). No biggie, since I don't notice any of the problems I used to have.
Lastly, I'm quite pleased with the battery life now!!

Lollipop problems for all LG G2s and G3s

Hello All,
Just wanted everyone to know that there seems to be a problem with the Lollipop upgrades from LG. It is not a Sprint problem as when I did a Google search this morning users from all carriers are screaming. The problems mainly are:
- Slow charging - my G2 now takes several to get to a full charge where it used to take 1 hour.
- Fast Battery drain - the battery now lasts about 6 hours on average where before I could go all day with one charge.
- Slow Wifi speed - there are reports that this is caused by an implementation of IP6. There are ways to disable this if you are rooted.
- overheating - Phone gets really hot - when I am charging my phone the temps near the camera module get very toasty. It gets hot enough that I have to take the Otterbox case off to let it cool down.
I don't know when or if LG will fix the issue, just wanted you all to know what could happen before you upgrade.

I have none of these problems.

I also have none of these problems. My G2 battery life has been quite good on Lollipop so far, charges like it should, and isn't getting hot.
I'm getting 5hrs sot. I actually thought the battery was stuck a couple days ago. It sat all night and into the next morning at 100%. Idled all night on WiFi, took a couple pics in the morning as well as a call, browsed twitter and reddit, used the Starbucks app, and sent a picture through Textra. All while at 100%. I rebooting thinking it was wrong, but it started back up at 99%. 7hrs23min at 100%. Granted it's not going to be custom rom/kernel good but it's stock, so that's expected.
Did you factory reset after the OTA?
I ran the ZVE tot file, then side loaded the ZVA OTA with adb. Did a factory reset before booting and it's been great.
Sent from my LG-LS980 using Tapatalk

No Problems here
I also have none of the issues, i think maybe all the people who were on zve already and got the ota are having problems.

Agreed, no problems here. Best advice is to take the update and then factory reset. Like "Alt-Ctrl-Delete" for your phone. Works wonders.

I had stock and sideloaded the ota zip. I wiped the dalvik cache before updating. I have none of these problems whatsoever. My only issue is with lg or sprint. Apparently, for whatever reason they decided to remove LG home themes settings.

None of these problems. You might factory reset. You could also TOT back to ZVE and redo the ZVG upgrade. Factory reset after ZVG upgrade.

No problems here either. I did not factory reset though I had TOTed back to ZVE a few days before updating.

No problems with mine, either. In fact, I went back to Optimus DE rom and my battery really started draining fast, barely lasting through the day. Then did ZVE tot flash and sideload ZVG update, and battery is back to lasting 2 days and charges normally. Now going to try UltraPOP....

I had problems with fast battery drain and slow charging when I upgraded to Lollipop
Per advice from here, I TOT'ed back to ZVE, wiped the cache, did a factory reset, sideloaded to Lollipop, and did another factory reset. The battery drain problem seems to be gone. I thought the slow charging was fixed but I'm still checking it.

I've got crazy bad lag. It only seems to happen when the phone has been on awhile. Clearing recent programs doesn't seem to make a difference. A reboot will clear it up, but it always comes back. I wish we could get AOSP + latest radios on this damned thing...

hotbbq said:
I've got crazy bad lag. It only seems to happen when the phone has been on awhile. Clearing recent programs doesn't seem to make a difference. A reboot will clear it up, but it always comes back. I wish we could get AOSP + latest radios on this damned thing...
Click to expand...
Click to collapse
This one may be due simply to the memory issues in Lollipop (not G2 related). Lots of articles about the issue online. Unfortunately, no fix available (it remains to be seen if even Android 5.1 has resolved the issue)

Big Boy Laroux said:
This one may be due simply to the memory issues in Lollipop (not G2 related). Lots of articles about the issue online. Unfortunately, no fix available (it remains to be seen if even Android 5.1 has resolved the issue)
Click to expand...
Click to collapse
http://repo.xposed.info/module/com.thetonyp.fixlollipopmemoryleak
Worth a try.

scottdanpor said:
http://repo.xposed.info/module/com.thetonyp.fixlollipopmemoryleak
Worth a try.
Click to expand...
Click to collapse
excellent! I'll give that a try when i get xposed up and running.

no probs here
Bat settled down after a couple charges

The only issue I have with 5.0 is the lack of wireless storage. shame.

Disabling IP6
piedra92 said:
Hello All,
Just wanted everyone to know that there seems to be a problem with the Lollipop upgrades from LG. It is not a Sprint problem as when I did a Google search this morning users from all carriers are screaming. The problems mainly are:
- Slow charging - my G2 now takes several to get to a full charge where it used to take 1 hour.
- Fast Battery drain - the battery now lasts about 6 hours on average where before I could go all day with one charge.
- Slow Wifi speed - there are reports that this is caused by an implementation of IP6. There are ways to disable this if you are rooted.
- overheating - Phone gets really hot - when I am charging my phone the temps near the camera module get very toasty. It gets hot enough that I have to take the Otterbox case off to let it cool down.
I don't know when or if LG will fix the issue, just wanted you all to know what could happen before you upgrade.
Click to expand...
Click to collapse
My wifi speed has declined a lot under Lollipop. I'm rooted. How can I disable IP6 to see if that is the problem?

rklurfeld said:
My wifi speed has declined a lot under Lollipop. I'm rooted. How can I disable IP6 to see if that is the problem?
Click to expand...
Click to collapse
[ROOT] DIsable IPv6 by Lennart in the Play Store

hotbbq said:
I've got crazy bad lag. It only seems to happen when the phone has been on awhile. Clearing recent programs doesn't seem to make a difference. A reboot will clear it up, but it always comes back. I wish we could get AOSP + latest radios on this damned thing...
Click to expand...
Click to collapse
I don't see this lag at all. I updated via ota zip and cleared dalvik cache before updating. A factory reset will do you well.

Wifi speed increase
I used Disable IPv6 on my phone and it did not solve my speed and connection problems. Very low internet speed and from time to time dropping and then reconnecting to my home router. However, I disabled IPv6 on my router, and now my speed is back to normal. So disabling IPv6 on my router and my LG G2 seems to have resolved this lollipop bug.

WiFi crashes after phone goes to sleep

Hello,
I have recently factory reset my OP3 due to a battery drainage issue. Google play services started using around 30% of my battery and consequently my SOT decreased by a lot.
After the factory reset, I freshly installed of all my old apps, and I downloaded my photos from the Gdrive.
Unfortunately, since then my WiFi is acting strange. Whenever I start the phone, the WiFi is performing normal, but after a while my phone goes into deep sleep and my WiFi disables itself (just like i configuered in settings). However, when I wake my phone, my WiFi won't turn on and when I go to the WiFi settings the phone becomes extremely laggy.
I have already wiped my cache again but I don't know what else to do.
Any help is appreciated!
Kind Regards,

Same strange problem here,I must reboot phone to connect wifi.
I trying with 3 kernel, it's not kernel problem.

It's such a strange problem. I don't understand why this problemwould occur after a complete factory reset...
I had the same issue a few years ago with my HTC One M7.
By the way, my OP3 is completely stock running Android 8.0

Same problem with my 5T on 5.1.1. Weird thing is I haven't made any changes, just updated a few apps but none of them should be causing wifi issues and settings (battery history) to lag after sleep.

Dark-shot said:
It's such a strange problem. I don't understand why this problemwould occur after a complete factory reset...
I had the same issue a few years ago with my HTC One M7.
By the way, my OP3 is completely stock running Android 8.0
Click to expand...
Click to collapse
I have set wifi to always on and don't have this problem. May be the doze feature is affecting it in your case. Why don't you try the always on setting? For me it doesn't drain the battery also. So no harm in trying it.

And why settings not responding? I must touch home button in order to have working settings again.
I think it's Oxygen Os problem.

tnsmani said:
I have set wifi to always on and don't have this problem. May be the doze feature is affecting it in your case. Why don't you try the always on setting? For me it doesn't drain the battery also. So no harm in trying it.
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Click to collapse
The problem does not occur if I set WiFi to always on. However, this uses way more battery in my case.
If i set WiFi to always on my sot decreases from 4-5 hours to 3-4 hours.
EDIT:
I also can't find this issue anywhere else on the internet.

Dark-shot said:
The problem does not occur if I set WiFi to always on. However, this uses way more battery in my case.
If i set WiFi to always on my sot decreases from 4-5 hours to 3-4 hours.
EDIT:
I also can't find this issue anywhere else on the internet.
Click to expand...
Click to collapse
Can't find anything either. You have any of these apps installed? Substratum, Microsoft Remote Desktop, Twitch. Updated these apps two days ago which is when I noticed this problem, haven't change anything else really. Updated router firmware too (Virgin Media).

Dark-shot said:
The problem does not occur if I set WiFi to always on. However, this uses way more battery in my case.
If i set WiFi to always on my sot decreases from 4-5 hours to 3-4 hours.
EDIT:
I also can't find this issue anywhere else on the internet.
Click to expand...
Click to collapse
I can only think of factory resetting again and checking the behaviour of wifi before installing any other apps and downloading photos. Then you will know whether an app or the downloading is the cause and take action accordingly.

nrkf said:
Can't find anything either. You have any of these apps installed? Substratum, Microsoft Remote Desktop, Twitch. Updated these apps two days ago which is when I noticed this problem, haven't change anything else really. Updated router firmware too (Virgin Media).
Click to expand...
Click to collapse
No, I haven't installed any of those apps. However, since the factory reset I started using the regular Chrome instead of Chrome Beta.
tnsmani said:
I can only think of factory resetting again and checking the behaviour of wifi before installing any other apps and downloading photos. Then you will know whether an app or the downloading is the cause and take action accordingly.
Click to expand...
Click to collapse
I could also test that with the phone in safe mode, right?

Dark-shot said:
No, I haven't installed any of those apps. However, since the factory reset I started using the regular Chrome instead of Chrome Beta.
I could also test that with the phone in safe mode, right?
Click to expand...
Click to collapse
I think so, yes.

I just disabled all third party apps, and the problem still persists

I have set wifi always on,and flash HolyDragon kernel, problem it's gone.
I don't know if kernel, or settings always on wifi, resolve my wifi connection.

I've been having the same problem too as of yesterday. Did a factory wipe and reinstalled Oxygen 5.0.1 but still having the issue after i reinstalled apps. going to try a factory reset again and not install or update any apps to see if maybe a recent app update is causing this.

GXTracker said:
I've been having the same problem too as of yesterday. Did a factory wipe and reinstalled Oxygen 5.0.1 but still having the issue after i reinstalled apps. going to try a factory reset again and not install or update any apps to see if maybe a recent app update is causing this.
Click to expand...
Click to collapse
Could you update us if you manage to fix the issue?

Dark-shot said:
Could you update us if you manage to fix the issue?
Click to expand...
Click to collapse
IT didn't work for me. Right after flashing the OS back onto the phone and connecting to WiFi, i changed the WiFi setting for "Keep WiFi awake when asleep" to "only when plugged in" and after locking the screen and waking it back up a few minutes later it still wouldn't activate the WiFi; I had to manually go into the WiFi settings and turn WiFi back on.
On the bright side though, I did do some reading on the "Keep WiFi awake when asleep" setting and several sources said to leave it on "Always" since it actually drains more power turning on the WiFi radio when the phone wakes up. I've since changed that setting to Always and over the last two days I've noticed slightly less battery drain!

It happen to me too. Cant turn on wifi after waking up from deepsleep. Must reboot the phone. I had tried to clean everything , data, system,cache, everything and made a clean flash but it still happen ,only for 8.x android. I tried in Nougat and see no such problem. Im using oneplus 5t

Yea, I have same problem staring with oreo update. Can say, that I tried all kernels around, and some of them made wifi connecting faster or even reduced the number of crashes, but not completely. Sadly, I can't stay on those kernels, coz I have another problem, - iv got random reboots with most of them, only stock works... So every solution is inappropriate for me, and I reverted to nougat waiting for Android 8.1

Same problem here. I am on beta 35. Additionally I was on Franco kernel and had random reboots. Kernel back to stock no more reboots but still the wifi issue. I'll test the always on.

Hopefully it gets fixed in the next update. For now, I'm using the ''always on'' WiFi option.
Thank you all for the replies!