Wakelock caused by charger - Nexus 4 Q&A, Help & Troubleshooting

OK so any charger I use including the stock charger gives me a wakelock called PM8921_eoc and it is causing my N4 to charge very slow this wakelock will run the whole time my phone is plugged in. I've tried different chargers and different power sockets to move avail. Can anybody help me this is so frustrating.
Edit: I bought a OEM LG wall charger and I'm gonna see if this helps. I hope so cause this wakelock only appears when my phone is charging.
Using Tapatalk 2

Wakelocks don't matter when you're charging. Wakelocks only prevent deep sleep, which is already disabled while charging

jacklebott said:
Wakelocks don't matter when you're charging. Wakelocks only prevent deep sleep, which is already disabled while charging
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Ah OK so hopefully the new charger I got will help it to charge faster. I need to check and see if my phone is recognizing the original charger as a USB. Thank u so much I feel better now.
Edit: My N4 reads the original charger as ac so I dunno its OK though maybe a ROM will fix my extremely slow charging. I will just keep trying different Roms and kernels till I find what I want.
Using Tapatalk 2

Related

Charging issues.

I've noticed that when I leave the phone plugged in overnight it sometimes just seems to stop charging at a random point somewhere throughout the night and I'll wake up with a phone that is only at 80%, 65%, etc.. battery. It isn't fully charging and then just being drained again either, it just randomly stops charging. It will recognize that a charger is plugged in and even says that it is charging but the percentage indicator in the Settings pulldown doesn't move. This doesn't happen every night and it has never happened when I charge the phone during the day. I assume it only happens at night because I'm not at my desk using it. I can also assume that the device isn't taking 8 hours to go from 35% battery to 75%, it doesn't charge that slowly. Any ideas?
P.S Rooted but on stock ROM
Heartbreak said:
I've noticed that when I leave the phone plugged in overnight it sometimes just seems to stop charging at a random point somewhere throughout the night and I'll wake up with a phone that is only at 80%, 65%, etc.. battery. It isn't fully charging and then just being drained again either, it just randomly stops charging. It will recognize that a charger is plugged in and even says that it is charging but the percentage indicator in the Settings pulldown doesn't move. This doesn't happen every night and it has never happened when I charge the phone during the day. I assume it only happens at night because I'm not at my desk using it. I can also assume that the device isn't taking 8 hours to go from 35% battery to 75%, it doesn't charge that slowly. Any ideas?
P.S Rooted but on stock ROM
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Click to collapse
Do you have another charger/cable connection you can try?
Stryder5 said:
Do you have another charger/cable connection you can try?
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Click to collapse
I'll give it a shot. Thank you.
I tried it with a different cable last night and it did the same thing. Forgot to mention I'm charging it through my computer.
Heartbreak said:
I tried it with a different cable last night and it did the same thing. Forgot to mention I'm charging it through my computer.
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I would try the charging cable that came with it and if it still does the same thing I would say you have a problem with your phone.
Sent from my Nexus 4 using xda premium
coldfusionb said:
I would try the charging cable that came with it and if it still does the same thing I would say you have a problem with your phone.
Sent from my Nexus 4 using xda premium
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Yeah, I have been using the cable that came with it. I've tried two different ones. I will try to see if it happens when charged through wall outlet.
Sorry for double post. Couldn't figure out how to attach image to an edit.
I looked at my battery settings and this is what I noticed. It looks like my phone is charging all the way up during the evening and then draining but the charging isn't kicking back or something. The huge gap in screen on time was when I was sleeping and there was no use of the device but battery is steadily draining.
Heartbreak said:
Sorry for double post. Couldn't figure out how to attach image to an edit.
I looked at my battery settings and this is what I noticed. It looks like my phone is charging all the way up during the evening and then draining but the charging isn't kicking back or something. The huge gap in screen on time was when I was sleeping and there was no use of the device but battery is steadily draining.
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Click to collapse
Have you tried using the wall charger?
Stryder5 said:
Have you tried using the wall charger?
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Click to collapse
As stated in previous post, I have not. That is the plan when I get home.
I have tried it through the wall charger for the past few nights and it charged just fine. I also tried it through the same cable that my N7 and Gnex were charged with and it still happened. I also tried various USB ports. Any ideas?
Sent from my Nexus 7 using xda app-developers app
Is it possible the computer is sleeping and no longer powering the USB ports?
I had exactly the same problem for one night.
But it can't be a problem with my Notebook because
my Galaxy S charged just fine.
Probably due to power saving options on your computer, be they USB power saving settings or sleep related. If you want to charge faster you should definitely use the wall charger, USB charging is painfully slow for me... if i am using the device, load can exceed the incoming current and the phone will still discharge. Moral of the story > USB charging = useless.
negroplasty said:
Probably due to power saving options on your computer, be they USB power saving settings or sleep related. If you want to charge faster you should definitely use the wall charger, USB charging is painfully slow for me... if i am using the device, load can exceed the incoming current and the phone will still discharge. Moral of the story > USB charging = useless.
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Click to collapse
It really isn't a matter of slow charging. I'm charging it overnight so the speed at which it charges doesn't matter to me. As long as it is charged when I wake up. I've been using the same computer to charge my phones/tablets/cameras for two years and I've never had a problem. I'm not even using the device though, it is at night when I'm sleeping.
I have the same problem all of a sudden. Happened twice in the past week, never happened for months before. I never charge from a computer, always with the provided adapter and cable from the wall. A few hours into the night, before the phone is at 100% (varies from 70-90%), it just stops charging. Battery graph looks very similar to the one in this thread already posted.
I wonder which device switches the current off, the phone, or the wall adapter. I would have guessed the phone, and if that is correct swapping the wall adapter won't do anything.
Or you can use Fast Charge from Google Play and flash Franco Kernel.
Then you'll be able to switch from USB Charge to AC Charge by charging with your computer.
However, the battery will heat and you may consume its life, so do not do that too often, only when necessary if you expect using your phone very long times as i do, i just change phone every 5 years or more, depending of my needs.
Also, i noticed than USB Charging slowing down the charge at around 80%, but still charging, i read with Battery Monitor Widget, and i seen it will gives minus ampere.
I almost forgot, you may also calibrate your battery, the first time, charge it to 100%, then remove the file "batterystats.bin" from /data/system or wipe it threw Recovery, that will ensure you to use your battery to 100% next time.
Mine seems to stop charging at 100% and go back down also. Mine usually is between 95-100% when I wake up though. Is that just how this phone works to protect the battery? I've never noticed this in any other phone I've had.

Charging issue

There seems to be a bug, where if i leave the phone connected overnight on the stock charger and wifi is off when i wake up the battery is at 80% or less. My theory is that as soon as it reaches 100% it stops charging, has anyone experienced this?
Here is a screenshot of battery settings
Sent from my Nexus 4 using xda app-developers app
Isn't this why SBC kernels came to be popular
Sent from my Nexus 4 using xda app-developers app
Now don't say its another bug
imoumni said:
There seems to be a bug, where if i leave the phone connected overnight on the stock charger and wifi is off when i wake up the battery is at 80% or less. My theory is that as soon as it reaches 100% it stops charging, has anyone experienced this?
Here is a screenshot of battery settings
Sent from my Nexus 4 using xda app-developers app
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Click to collapse
Same issue happened to me. It only happened once though. Does this happen all the time for you?
aznsmith said:
Same issue happened to me. It only happened once though. Does this happen all the time for you?
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happened twice so far.
Is this expected behavior?
imoumni said:
happened twice so far.
Is this expected behavior?
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Click to collapse
This is happening to me as well; I've come to believe it's a faulty charger, actually. Or a charger designed that way. But the charger's fault regardless.
First occasionally, but now for a few nights in a row, I've found a phone plugged in overnight to be at 80% battery in the morning. When I look at the battery graph, it appears to have charged rapidly to 100% (or close-to), then started slowly discharging. However, with the battery use screen open, I also noticed that the status was rapidly changing between "Charging (AC)" and "Not charging", spending most of the time in the not charging state, despite a constant plugged-in icon in the notification area. This behavior persists regardless of wifi state and through many reboots; BUT, it hasn't happened at all yet (with just limited testing) when plugging it in through the adapter for my last phone (an HTC), nor does it happen when charging via USB. I don't know if the LG charger could be designed that way, where it stops when it's full, or if it's just a faulty unit that needs replacing. I'm going to try it on the HTC wall unit overnight tonight to see what happens.
chinly43 said:
This is happening to me as well; I've come to believe it's a faulty charger, actually. Or a charger designed that way. But the charger's fault regardless.
First occasionally, but now for a few nights in a row, I've found a phone plugged in overnight to be at 80% battery in the morning. When I look at the battery graph, it appears to have charged rapidly to 100% (or close-to), then started slowly discharging. However, with the battery use screen open, I also noticed that the status was rapidly changing between "Charging (AC)" and "Not charging", spending most of the time in the not charging state, despite a constant plugged-in icon in the notification area. This behavior persists regardless of wifi state and through many reboots; BUT, it hasn't happened at all yet (with just limited testing) when plugging it in through the adapter for my last phone (an HTC), nor does it happen when charging via USB. I don't know if the LG charger could be designed that way, where it stops when it's full, or if it's just a faulty unit that needs replacing. I'm going to try it on the HTC wall unit overnight tonight to see what happens.
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Click to collapse
I'm actually having a similar problem... For me I noticed that the screen stays on while the battery is discharging while on AC charging mode so it may be a different issue. It doesn't always happen but when it does, I'll be sitting around 75% when I wake up in the morning.
edited in a screen cap
Just checking in - a few days later, it hasn't happened yet using the HTC charger.
tofuboi88 said:
I'm actually having a similar problem... For me I noticed that the screen stays on while the battery is discharging while on AC charging mode so it may be a different issue. It doesn't always happen but when it does, I'll be sitting around 75% when I wake up in the morning.
edited in a screen cap
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Click to collapse
Turns out this is caused by using a USB extension cable... it would say the phone is charging on AC but there would not be enough current going through. When I plugged the the stock usb cable in to the charger directly, it charged fine.

Battery won't charge all the way (but only sometimes)?

I am having a weird problem every now and then. Most of the time when I charge my phone it juices up all the way fo full, no problem. But every once or twice a month it charges to about 70%, then just stops (see attached screenshots). If I look at the lockscreen I can see the charging notification flickering on and off. It won't charge to 100 unless I unplug and replug, then it seems to fix the problem.
I'm on stock rom 4.2.2, faux kernal v11.
Has anyone else had this problem? Any help would be appreciated.
try turning phone off, then charge it?
same issue?
Plug/Unplug the cable and the charger several times, does the trick for me
Yea, I can get the phone to charge again by unplugging and plugging back in the cable, it just kind of stinks to wake up and find out that my phone didn't fully charge overnight.
It's not a big deal, I was just hoping someone found a solution to stop it from happening.
The solution I found is using a different charger
calanizzle said:
The solution I found is using a different charger
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Click to collapse
I think I'll have to try this, I'm currently using the charger that came with the phone, but maybe I'll try one of my older chargers and see if that fixes the problem.
calanizzle said:
The solution I found is using a different charger
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Used to happen every so often to me with the stock charger too so I bought a different one and it just happened to me again last night on the new one after a couple weeks of use.
i have this issue too, it will charge fine for a while but then ill wake up in the morning to see it rapidly switching from AC to Not charging over and over again. i dont know why but i dont want it to damage the phone
Same crap here
Since it happened the last time I've switched to using my old Sony charger and cable. So far so good, hasn't happened again...yet.

[Q] Battery drains when plugged in

I have a nexus 7 1st generation, the battery drains when it is plugged in so it doesnt charge, however, it does charge when turned off.
I have tried two different wires, I charge using the wall socket.
I have tried using different sockets but I still experience the same problem.
I haven't rooted it or anything
I've been on trouble shooting forums etc and have installed battery moinot widget, its says Status: discharging AC plugged in
Health: good
Temperature: 27°C
Voltage:3907
Capacity: 2854/4325
Battery flow: -612mA ( -14.15%/hr)
I know people usually ask if there are any apps using a lot of battery but right now 77%= screen, 4%= android system, the other is used up by other apps it only using about 2% each
I dont understand what it is because if it was something to do with the connection it wouldnt charge when off, but it does, just not when turned on
Would any factory reset help?
Any advice????
Mine has done that sporadically. With USB and dock. Usually a reconnect will get the current flowing. There's a thread here somewhere suggesting charging on the 500ma computer usb connecting and reconnecting a few times. I think it's the USB daughter board.
Sent from my Le Pan TC1020 using Tapatalk
OK, can't find original thread. I suspect the battery is too hot and the charge delayed. Then once in deep sleep it never starts the charge. I'm going to set WiFi on while charging, hopeful a sync will wake it to resume charge.
sent by mirrorflash Morse code
claire13524 said:
I have a nexus 7 1st generation, the battery drains when it is plugged in so it doesnt charge, however, it does charge when turned off.
I have tried two different wires, I charge using the wall socket.
I have tried using different sockets but I still experience the same problem.
I haven't rooted it or anything
I've been on trouble shooting forums etc and have installed battery moinot widget, its says Status: discharging AC plugged in
Health: good
Temperature: 27°C
Voltage:3907
Capacity: 2854/4325
Battery flow: -612mA ( -14.15%/hr)
I know people usually ask if there are any apps using a lot of battery but right now 77%= screen, 4%= android system, the other is used up by other apps it only using about 2% each
I dont understand what it is because if it was something to do with the connection it wouldnt charge when off, but it does, just not when turned on
Would any factory reset help?
Any advice????
Click to expand...
Click to collapse
I had the same problem with mine. However, for some reason when i used an HTC charger (with the usb to AC adapter) it was charging faster than losing charge. Once i changed chargers to one with a shorter but thicker cable, i never had the problem again, even with the brightness all the way up.
Hope this helps.
thats the same problem that i got when i first got my nexus 7
what fix it was a different charger and cable

Msm_otg wakelock

Hello everyone.
So there's been a quite few roms around the last weeks enough updates and all that. I noticed that on all roms(literally all of them cm11,cm12.1,RR,MOTION ROM) I get a wakelock named msm_otg after I fully charge my phone and disconnect my charger. This wakelock disables deep sleep and doesn't let the phone sleep on screen off. Is there anyone that can confirm this and maybe we can try a fix? Only fix at the moment is to reboot the device but I don't see a reason why I should always reboot my phone after I charge it. (my device is gti9301i)
Mike20017 said:
Hello everyone.
So there's been a quite few roms around the last weeks enough updates and all that. I noticed that on all roms(literally all of them cm11,cm12.1,RR,MOTION ROM) I get a wakelock named msm_otg after I fully charge my phone and disconnect my charger. This wakelock disables deep sleep and doesn't let the phone sleep on screen off. Is there anyone that can confirm this and maybe we can try a fix? Only fix at the moment is to reboot the device but I don't see a reason why I should always reboot my phone after I charge it. (my device is gti9301i)
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Click to collapse
I think i read somewhere this wakelock is related to when you plug you phone to a computer. Do you charge your phone using pc?
http://forum.xda-developers.com/showthread.php?t=1963792
It is already known with Sprint GS3 (Snapdragon S4)
@zigbye82 nope I use stock charger :-/
The only solution, as for now, is to restart your phone after being charged.
I would suggest that you try charging using a different cable or charger and see if problem is still there. For me this wakelock is high when i charge with usb but goes away when i disconnect.
zigbye82 said:
I would suggest that you try charging using a different cable or charger and see if problem is still there. For me this wakelock is high when i charge with usb but goes away when i disconnect.
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Click to collapse
What cable/charger combination helped you? :-/
I dont have this problem. What i'm saying is when i charge my phone on pc the Msm_otg wakelock is high but it goes away when i disconnect from pc. When i charge with my charger i dont get this problem. Maybe you have a defective usb cable or charge.
zigbye82 said:
I dont have this problem. What i'm saying is when i charge my phone on pc the Msm_otg wakelock is high but it goes away when i disconnect from pc. When i charge with my charger i dont get this problem. Maybe you have a defective usb cable or charge.
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But I use stock charger :/
Mike20017 said:
But I use stock charger :/
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I dont think you are understanding me.
What i'm trying to say is that you may have a defective usb cable. Try a different cable and see if the problem is still there.
zigbye82 said:
I dont think you are understanding me.
What i'm trying to say is that you may have a defective usb cable. Try a different cable and see if the problem is still there.
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Click to collapse
Confirm! This wakelock is related to change state in the internal memory and usb state. Change the cable and check your kernel. In Cm11 and Cm12.1 there is no problem. Ive got this wakelock when using my phone like external flash drive. Don't worry
If you keep getting issues, just reboot right after unpluged the device.
Their whose attempt to resolve this in last public Samsung source. Did it work I don't know?
Recommendation goes for kernel makers along with rom maker's to disable the future on kernel side (as it's been done for CM13).
For those who would say that they need USB OTG I would say it never whose handy anyway as thanks to not power compliant USB controller QC traditionally used it requires external power source & cable with a plug for it.
Using any cable or charger won't change this! All do I admit that charging module placed in cellular modem section can be itchy (from jamming l at full charged to celullular network collapse until whole module is automatically restarted & when that fails to happen even causing kernel panic [making phone to restart]) so use quality cable's/charger.

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