Sudden and unexpected reboot? - Nexus 7 Q&A, Help & Troubleshooting

Hi, guys! Running stock rooted fine for the last week and a half, and while I've been using it pretty well in that time, I've come across an oddity.
A few times in the last two days, my tablet screen will be off and it'll suddenly reboot with the google unlocked screen and the nexus X before resuming it's normal function.
At least twice when I was doing this, I had just unplugged an OTG cable with an Ethernet adapter. Is unplugging the OTG cable while it's asleep forcing a reboot or do I possibly have a glitch in my hardware/software somewhere? Also, it has happened once or twice just on its own. Battery both times was over half (54 and 82).
-Ara

Related

Screen goes blank

Twice yesterday my GT screen went blank. The tablet isn't dead because I can see the backlight on at about 10% brightness. Gives off an eerie gray tone to the screen.
The screen and volume controls do nothing to revive it. However, holding down the power button for about 20 seconds turns the unit off. From there I can reboot.
One of the times happened during the night while I was recharging the unit. It locks the unit up so tight that the charger stops charging. When I unplugged it from the charger and rebooted it in the morning it only had a 42% charge.
Any idea why this is happening? Since it affects charging it appears to be hardware related. Can a software hiccup cause the charger to stop charging?
If it keeps up I may do a factory reset to see if that solves it.
Anyone else having this issue?
Sorry but I haven't had anything like that happen...but I wouldn't tolerate it for more than a couple days.
out of juice ?
Are you using USB charging or the wall charging plug ?
There's a BIG difference in charge .. USB trickles and once the screen is on or you're downloading .. it discharges ..
This has happened to me a few times too. I figured it was just some odd bug.
I haven't experienced this on either of our tabs (both are 16GB (retail) a white and a gray both rooted nothing custom as of yet/ both have locked bootloaders)
Probably not relevant, but I see 2 people have posted this experience. So I ask are either of you rooted or using custom kernel/rom, 16GB/32GB?
This happended to me a couple of times:/ actually happened 2 hours ago. I realized within an hour so only lost 30 percent. I hope there will be a fix with touchwiz ux, even though i don't want to update it to touchwiz, I might have to
This has happened to me, and I am not rooted.
Sent from my GT-P7510 using Tapatalk
Not rooted and I only charge with wall charger.
Someone asked if I was rooted, I am. Was running stock kernel and rom the first few times this happened though. Only charge with oem charger, although I've only seen it happen once while on charger.
Sounds like it's shutting down but not completing the power-off.
When you power off the tablet - you'll see it do the same thing - it's the backlight that's still on.
If you have access to the android dev tools/adb - use: adb logcat and see if there's any useful output about what's happening.

Battery - Charging being inhibited

Have searched the forum and Google and haven't found anything yet. Usually good at performing obscure random searches but not this time. First off, I am running stock rooted 4.4.4 NI2. Running xposed and wanam but haven't found anything pertaining to my dilemma there either. Onto my issue...
I noticed after I got the phone a couple of months back that it wouldn't be at 100% when I woke up. Usually would be around 97 or so... No big deal. I tested chargers (my wife has/and had an s5 before I purchased mine) and cables with no real difference that I could see. I figured it was some type of protection built into the phone so when it achieved a full charge, it would stop charging until needed. I was perfectly fine with this, but that wasn't the big issue. I have also noticed that if I plug my phone in to charge and end up having to move to another outlet or get into my vehicle, when I plug it in again it won't charge.
The screen will come on acknowledging that it is plugged in, but it will not charge for an extended amount of time. It is almost like the phone has protection built-in so that if there is an issue with a charger/port connecting and disconnecting continuously, it will inhibit the charging until it has a consistent current. I, for instance, am about to head to the gym and wanted to charge my phone before going. It was at 13%, plugged into my nightstand charging. My wife and son got home and are going to take a nap so I unplug and go into the living room to continue charging. It was at 31% and when i plugged it back up a few seconds later it would not charge. I kept it plugged up as i was typing here and it didn't resume charging until is over halfway through writing this post. (5-10 minutes maybe? Haven't tried counting it exactly... Yet) Haven't heard or seen anything like this previously on multiple devices (Samsung, htc, 3 nexus devices, etc.) and haven't been able to find anything online so thought I'd ask here.
Also, sorry if anything isn't stated in a way to describe things perfectly. If anyone has any questions or thoughts, I would truly welcome them.
Thanks in advance.
Sent from my SM-G900V using Xparent Blue Tapatalk 2

problem - daydream vs sleep

Hi,
So I was using my Nexus 7 wall mounted, and on KK daydream worked perfectly. I had quotes scrolling all day, and if you needed something you just touched the screen and the quotes would go away, and you could do whatever you needed. I upgraded to 5.1 and now the tablet daydreams for a little while, but then the screen turns off, necessitating pressing the power button to wake the tablet up. I flashed pure nexus for MM last night thinking this was something inherent to 5.1, but it is still doing it under the new rom.
Anyone know what I am doing wrong? I basically just want a screen saver that goes away when you touch the touchscreen.
Thanks,
Josh
No one else is having this problem? Or am I the only one who uses daydream?
So, I had the tablet plugged into an outlet that had two USB ports in it (I installed an outlet that had a regular 110v plug on the top and 2 USB ports where the second outlet would normally be). I pulled the USB cable out of the outlet USB port, and took a standard 1.35a wall wart and plugged it into the regular outlet, and then the tablet daydreamed for several hours before going to sleep. What am I doing wrong?
A few ppl have had issues with 5.1 regarded charging/lag/ deep sleep, but iv yet to see a conclusive answer to these problems, I for one since lollipop have had a few issues, first was serious lag and power drain while charging, now after a few updates on the Rom I'm using I'm only having charging issues, however what promoted me to reply here is today I noticed that when my daydream came on the battery% would stay where it is but if I interrupted the daydream by pressing the power button and tuning it off the battery% would go up, so I'm assuming that daydream is causing some sort of power drain while powered on and charging cause I don't have this issue when my tab is powered off and charging. As for the deep sleep thing I think it's a kernel thing cause at present I'm also testing an update to the ROM I'm using and I'm having the same issue that you have mentioned, I created a thread under (power drain) there is a link to the 5.1 Rom I'm using try it v1.9.4 is stable I did not have the daydream/ deep sleep issue on that.
Sent from my Nexus 6 using Tapatalk

Charging intermittently stops and resumes rapidly

My 6P on 6.0.1 stock with the march update has had occasional times where it will intermittently charge, then stop, then charge endlessly, changing back and forth about once a second or more often. There's been times I've woken up, like today overnight when I noticed it barely inched up a percent or two on the Google USB-C cable connected to my laptop.
To isolate this from being a defective cable issue, this has also happened with the Google charger that came with the phone. I would see the screen turn on in fact, like when you first plug the phone with the screen off, to indicate charging has begun. That would occur every few seconds.
I'm a little concerned. The time it happened with the charger, a reboot seemed to have calmed it down. But today no matter the restart, the charging just keeps cycling nonstop.
Anyone else had this? Would it be wise to file a problem with the Google forums and contact support?
Thanks for any help!
Same problem here
Dang, good to know I'm not alone!
I've also experienced higher battery drain (twice more I'd say) than normal recently. Even overnight when I used to see hourly drain rates of 0.5%, now I see 1.5% and higher. Getting worried the charging issue may be damaging the battery. But it could also be the patch or a rogue app.
I have the same issue - it started about 3 days ago
Well either the cords bad, the brick is bad, or the receptacle. Or the charging port on the phone, the battery or power control module in the phone. Or if theirs a thick case on your phone.
Sounds like it starts to charge then stops. But I'm no electrician. Oh wait, yes I am.
It starts to charge, then stops as though the cable was disconnected, then resumes within half a second, then disconnects, and so on and so forth non stop.
Case might be a reason. It's a rubber and plastic transparent Spigen one. I'll try removing it when it happens again next time.
But at this rate, sounds like 3 people are having the same issue, and if it's a hardware one, then damn....
This isn't the charger... There is something buggy with the update. I woke up a few days ago after the march update with an almost dead phone, and the charging icon flashing over the battery, as if the phone new it was plugged in but refused to charge. I unplugged and plugged it back in with the same result. I restarted and tried again, same result. I was only able to get it to charge my plugging it into my girlfriend's nexus 5x charger, which instantly started charging my phone. I went back to my charger and all of the sudden no issue and the phone was charging fine. There is definitely something up with this update.
Well then, that makes 4 people now.
What's a good way to report this?
I'm not seeing the same exact issue as you guys, but I AM having charging issues after updating to MHC19I. I can still charge my phone from the stock charger and my other USB-C chargers, but now none of them allow my phone to charge rapidly. Do you guys who can get your devices to charge from a rapid charge compatible charger see the "Charging Rapidly" message on the lock screen? Ever since this recent update, I've noticed that my device isn't (and is taking over 2 hours to charge fully from ~20%).
I have this problem too. It's fixed by a reboot so I'm assuming it's not a hardware problem. It only happens once a week or so.
The first time it happened I didn't notice the charging/not charging and only realised something weird had happened because my phone was off & showing fully charged. My phone is never switched off.
I figured it out the next time when I noticed the screen was still on during the night. Switching from charging to not charging was keeping the screen on.
So glad it's not just me.
flightsimmer said:
I'm not seeing the same exact issue as you guys, but I AM having charging issues after updating to MHC19I. I can still charge my phone from the stock charger and my other USB-C chargers, but now none of them allow my phone to charge rapidly. Do you guys who can get your devices to charge from a rapid charge compatible charger see the "Charging Rapidly" message on the lock screen? Ever since this recent update, I've noticed that my device isn't (and is taking over 2 hours to charge fully from ~20%).
Click to expand...
Click to collapse
I normally see it say that on the USB C charger. That being said, you seem to have an intermediate speed going on, as opposed to super slow normal USB cable speeds and the USB-C fast charger. In my experience most 1-1.5V low amp ports like my Mac's, or the car's USB port will charge at a rate of about 1% per 3-5 minutes. So a full charge would take 8-9 hours from 0%. From the USB-C wall charger it would be about 1%/m so an hour and forty is enough to get it back to full.
Based on that your charger seems to be somewhere in the middle.
But yes it isn't normal. If you are using Google's native hardware, you should see the same charging speed as I am.
I'm just terribly worried this cycling is destroying my battery. I have definitely not gotten the same battery life the last few weeks.
Hey guys!
I experience sort of the same problem as you guys, but i have the Nexus 5x
i copy from my thread at google nexus forum
My phone just randomly die. It will work for like 2 hours. Almost like the battery would been disconnected.
When the phone shutdowns it says the battery is low and try to charge. The Battery icon with a flash is showing, but just for 5-7 seconds, then it shutdown again and it's looping again and again and again.... To get out of the loop i'm booting in to fast boot, then push at start. and it is almost 50/50 if it is working. It can be booting up and you see the red/yellow/green/blue yada yada boot-up sequence then in 5-7 seconds in to the sequence it would shutdown again immediately.
I tried several factory-resets. re-flashed to stock. Nothing helps.
/marcus
Same issue
Just starting having this issue. It constantly says charging then a second later shows no charging and the process keeps repeating itself. I did a reset and the issue seems to be resolved for now. Really hope this isn't a constant issue. Definitely appears to be software related though.
zxphenomenalxz said:
Just starting having this issue. It constantly says charging then a second later shows no charging and the process keeps repeating itself. I did a reset and the issue seems to be resolved for now. Really hope this isn't a constant issue. Definitely appears to be software related though.
Click to expand...
Click to collapse
I hadn't had it for a while then recently it happened again once. I still don't know what triggers it for sure.
The battery drain is also rather random. There are days I can expect the unit to idle and drain at or below 2%/h, but lately it just goes through it way faster, twice that. I am unsure why and how that happens so randomly. Seems the Google Play Services and Google Apps are using up some %s. Not much else I can identify.
I've had this issue since a few days ago, restarted the phone and it's come right for now.
Haven't experienced this in weeks now.
Seems largely gone.
Any updates on this? My Nexus 6P started showing the same symptoms (either won't charge at all, or charging cycles on and off rapidly (< 1 second) and only sometimes charges). The issue appeared out of the blue 4-5 days ago, just before the 1 year anniversary of receiving the phone. I tried different cables and adapters, still no change. Last night at 11pm it was at 50% when I set it to charge and it seemed to charge. This morning at 6:30 am it had only charged up to 83% and was charging on and off. Worried about how to reliably use the phone if it won't charge, and also how this might affect the battery / other circuitry.
Any help/tips appreciated!
Edit: The phone hasn't been dropped or had any other issue that may affect the hardware. Also, no OS update or anything recently (AFAIK - it did not ask me to install anything, not sure if there were any silent updates). It is currently on Android 7.0 Nougat (baseband version angler-03.72, build NBD90X, security patch level Oct 5, 2016).
Have not had this in a long time. It sort of stopped on its own. :S
Solved (for me anyways)
I just had to restart the device.
I'm having the same issue on my LG G5. Started out of the blue and like others, restarting temporarily solves the problem. Anyone solve this yet?

Critical issue with Android 6.0 on DT2

Now that my DT2 updated to 6.0, it has developed a showstopping problem. It instantly powers off at random times, usually when I'm using it. Worse, the power button is ineffective at restarting the phone. The only way to restart it is to plug it into a power source and then press the Power button after it acknowledges that it's charging.
It used to do it only one or twice per day, but now it's doing it constantly.
I've already performed a factory reset and then a cache wipe, with no change.
Verizon confirms that it's happened to others, so it's not just me.
Is it possible to revert my DT2 back to Android 5.1.1?
Has anyone else here experienced this, or have any suggestions, before I tell Verizon to send me a new phone?
Thanks in advance.
Sounds like a hardware issue to me, especially if it did it prior to the update as well.
Sent from my DROID Turbo 2
imnuts said:
Sounds like a hardware issue to me, especially if it did it prior to the update as well.
Sent from my DROID Turbo 2
Click to expand...
Click to collapse
I should have mentioned, it never happened in 5.1.1.
yep, i'm having this issue as well since i updated to 6.0 three weeks ago. started about 3 days after the update, i plugged my phone in over night and i woke up to it dead. couldn't get it to charge worth anything. would only go to 4% and stop. using original charger. won't go into turbo charge. stopped by the store and picked another charger and a portable battery and used the pre-charge on the battery and it finally started charging again, but not at the turbo rate it should have. it drained the pre-charge and got to about 45%. plugged in in once i got home and it still didn't see turbo charge, took about 6 hours to finish charging. over the next few days it was still slow to charge and would randomly lock up and then reboot itself. a few days later i woke up to the phone almost dead again, even though it was plugged and showed charging all night.
did some research, found more people with the same issue. Lenovo/Moto and Verizon support all suggested put it in safe mode, then see if it still does then same thing when all the third party apps are disabled. did this and yes, it still charged slowly, and while plugged in it the battery was still discharging (percentage number was dropping... pretty quickly). the next idea was a factory reset. haven't done that one yet myself.
here is a page to one of the lenovo threads about. seems to be the main on there at this point .
https://forums.lenovo.com/t5/DROID-TURBO-2-by-Motorola/Turbo-2-won-t-charge/td-p/3261260
I just posted this thread in the general forum for the DT2. Wasn't sure if you'd tried this yet or not - but solved many issues for me.
http://forum.xda-developers.com/droid-turbo-2/general/cqatest-app-marshmallow-causes-issues-t3386929
I also had issues with my DT2 charging. After upgrading to MM, the quick charge was sporadic, and it wouldn't work. Then I had issues with the charging port in general. If i barley wiggled the cable it would not charge, or send files via a computer.
I went up to a local Verizon store, explained my issue, and i had a replacement phone in about 3 days. They ran a special test to test all of the hardware on my phone, and sure enough when it got to the last test, which was the usb port, it failed.
I received the replacement phone with MM already installed, and have not had any issues with the usb port...so far. LOL
I ended up sending my phone back to Motorola; just got it back and it's till got 6.0 on it. It repeated this showstopper behavior twice today. NOT HAPPY.

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