Database Users

Automatic Shutdown?

Hi, I picked up a new 7" Tab 2 a few weeks ago, and it seems to randomly do an automatic shutdown if i haven't used it for a while. Sometimes when picking it up after putting it down overnight, or after I've left it home, the tablet is off, not just asleep. It also doesn't seem to matter if it is plugged in to power or not. Is this normal behavior, or is there a problem?

I would say it's a problem. I've left mine for several days on and off the charger and it never shuts down. Are you stock?
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Maximinus I said:
I would say it's a problem. I've left mine for several days on and off the charger and it never shuts down. Are you stock?
Sent from my MB870 using xda app-developers app
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Completely stock.

It could be a problem but, I've seen some tablets that have a setting to switch off after a certain amount of time. Check all your setting see if there's anything either ticked or highlighted by radio button to switch tab off

I have same problem one week ago, tablets restarts in my pocket two or more times in a day, since I installed cyanogen mod firmware al is ok, I was thinkin that may be an app is that make restart, not a hardware problem
Sent from my GT-P3110 using xda app-developers app

Its software on your tab. Trust me lol. Wiping or getting another rom will probably fix it.

Random reboots anyone else?

I'm having some random reboots, they are hot reboots not full. Anyone else having the same problem? I'm completely stock and no rogue apps that I'm aware of. It has happened a few times last 20 mins while browsing on xda app. Thanks
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znc62511 said:
I'm having some random reboots, they are hot reboots not full. Anyone else having the same problem? I'm completely stock and no rogue apps that I'm aware of. It has happened a few times last 20 mins while browsing on xda app. Thanks
Sent from my Nexus 4 using xda app-developers app
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Must either be bad silicone, or a bad rogue app... You can try a factory reset and try again! Also this needs to be in the Q&A section, this is not a general topic.

I had it reboot after I took a picture, then I swiped to left to see the picture while in camera mode. Zoomed in on the picture, heard some screeching sounds (probably from auto focus of camera?) and then it rebooted.
I hasn't tried to reproduce it, but I do hear the screeching once in a while if I go into picture view from camera mode.

I have had random reboots with my nexus 7 on 4.2, so I think it's more of a software issue than anything else.
Sent from my Nexus 7 using xda premium

I've just had one full reboot when watching a you tube clip. Nothing to worry about unless it happens frequently. I haven't owned a phone that hasn't rebooted or frozen at some point.
Sent from my Nexus 4 using Tapatalk 2

I've had about 4 restarts since getting it yesterday. Also happens on my Nexus 7. Thinking it may be an app on my google account but my Nexus 4 is pretty much stock.. Not sure what it is.

Have gotten it on the nexus 7 once but not on the nexus 4.

It is just 4.2 bugs supposedly. I am sure it will be fixed.
sent via xda premium with nexus 7

No reboots here.
Sent from my Nexus 4 using xda premium

Thanks everyone, just seeing if I was the only one.
Sent from my Nexus 4 using xda app-developers app

I have random reboots. As of yesterday, my phone rebooted 3 times. This morning I woke up, luckily before my alarm normally goes off, and notices my phone screen was on, but nothing was actually on the screen. I pressed the power button a few times and nothing happened. I unplugged the phone from the charger, tried it again, and notice the screen flicker, and then reboot. This morning it's already rebooted once.
Most of the time I was in Google Play Store, so I cleared the cache and data, and let it update to the newest version, so hopefully that fixes it. I sure hope I don't have a lemon. I really hope that the phone acting weird doesn't happen again, I can't afford to miss my alarm going off.

Mine has turned off on me twice since I got it. I think I was using bluetooth both times, but I can't be sure. Anyways, the Galaxy Nexus had issues like this when it first came out and the new Windows Phones have rebooting issues as well. I think Google rushed Android 4.2 out, but I'm sure everything will be stable after another OTA or two. That's the worst and best part about having a Nexus. You get brand new software first, so you sometimes feel like a beta tester, but you also get the fixes extremely quickly.

Glad I'm not the only one having random reboots. My n4 has rebooted twice this morning (within 2hrs). One hot and one cold.
Sent from my Nexus 4 using Tapatalk 2

+1 random hot reboots on my nexus 7 stock rooted 4.2. Happening at least 4-5 times a day, its becoming somewhat tedious now

no reboots so far :fingers-crossed:

I've had 1 random reboot while watching a YouTube video.
Sent from my Nexus 4 using Tapatalk 2

it seems there is some issue with android, not just now.. because the same thing happen a lot on the nexus 7 and Gnex.

aceo07 said:
I had it reboot after I took a picture, then I swiped to left to see the picture while in camera mode. Zoomed in on the picture, heard some screeching sounds (probably from auto focus of camera?) and then it rebooted.
I hasn't tried to reproduce it, but I do hear the screeching once in a while if I go into picture view from camera mode.
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Same happened to me today but i wasnt able to recreate issue.
I heard some screeching sound and then screen frozen and there it rebooted.
But after that i tryed to take pictures and i heard that screeching again but it not rebooted.
This was my frist time that Nexus 4 rebooted.
So
Software or Hardware issue?

I didn't have a reboot but shut off. First time yesterday and had the phone since Nov 20th. It wouldn't turn back on, not even charge .. Took maybe 30mins then it turned on. I was just texting, put the phone down.. Screen shutoff, wanted to text again and nothing. I have it unlocked and rooted only.. Stock everything.
Sent from my Nexus 4

4.2.2 just random rebooted
My nexus 4 now on 4.2.2 just randomly rebooted for the 1st time.
I 'm dissapointed. Waited for this OTA for a couple months now for it to just fix this issue and it's still here? :/
I just can't be angry at the device cause i 'm absolutely in love with it. Best device ever made and 4.2.1 (and 4.2.2) are amazingly consistent and stable, but for this issue.
pff just hope that we don't have to wait till KLP for this to be worked out.

Still Constantly rebooting....

I've been having random reboots ever since.....well, a long time ago. No matter what ROM, kernel, or android version, it still persists. It happens at least 5 times a day. Sometimes 10. It even does it when I have zero downloaded apps.
Now that I'm done complaining, I'd like some help solving this formidable problem. Has anyone experienced the same thing? What can I do to stop it? Etc.
This is with an 8gb WiFi.
Thanks
Sent from my Nexus 7 using xda app-developers app

After a reboot, you can know what cause this reboot with "last_kmsg" log. Look here for how to get it : https://code.google.com/p/tegraowners-ics-rom/wiki/How_to_get_logs

OK I did that. I scrolled through the unending file and at the bottom it said, "no errors found". Does this mean it doesn't know what caused the reboot, or did I miss something?
Sent from my Nexus 7 using xda app-developers app

My nexus 7 rebooted while typing out this reply....so frustrating that this just happens out of nowhere. At least five times a day for me too.
Can't be the rom...I've been on pa 3.0 for a while and it was stable before. I don't think it's the kernel because I've flashed the top 3 kernels and it fixes nothing.
I am thinking it's a rogue app because my nexus is also draining battery very quickly and something is causing non stop wake locks and keeping my device from sleeping. Now I have to hunt down this app out of my 100+ apps
Android can be very frustrating at times
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happyjack96 said:
I've been having random reboots ever since.....well, a long time ago. No matter what ROM, kernel, or android version, it still persists. It happens at least 5 times a day. Sometimes 10. It even does it when I have zero downloaded apps.
Now that I'm done complaining, I'd like some help solving this formidable problem. Has anyone experienced the same thing? What can I do to stop it? Etc.
This is with an 8gb WiFi.
Thanks
Sent from my Nexus 7 using xda app-developers app
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Revert to pure stock and if the problem persists assume that you have a hardware defect. Hardware defects are not curable with software - they are cured by replacement of the hardware. ( BTW, If you ran your device for significant lengths of time at extreme OC levels, you might have caused the damage; but that is for you to decide)
Mine has rebooted once in three months - but I could reproduce the crash ( using Chrome Beta on a specific WebGL demo ). That is very different than a spontaneous crash though, so I guess I could say it has *never* happened to me - and I have used the tab extensively every day for those three months.

Random shutdown of my phone?

I've noticed now more than a few times my phone was off when I thought it was asleep. I'm running stock 4.2.2 unrooted. Basically I put my phone down and when I come down to it the only way I can wake it up is to hold the power button. What bug is this
? I haven't ran anything odd ? And I notice my battery gets cut by a good chunk . is this something I should get it exchanged at at the store? I just got this phone less than 2 weeks ago? I'm planning on going today but wanted your guys input before i go?
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I am having the same problem, i have had my nexus 4 for about 6 months now. Last week it started shutting down and restarting randomly.
The battery dies when it reaches 20%, today it dropped from 54% to 6% after it restarted alone and lost my wallpaper.
If u find a solution let me know.

thats called "sod" sleep of death. its not actually powered off, its on but the screen doesnt wake. thats why you need to longpress the power button to reboot. it was aajor issue on the gnex until 4.2 came out. now its rare, but still happens. on the n4 too. its an android bug that was "fixed" for most.

how can we solve it?

google needs to fix it.
some people use this app as a temporary fix https://play.google.com/store/apps/details?id=com.gejos.android.wakemyandroid

thx u, i will give it a try.

So there's no point exchanging for another at the store?
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Ended up exchanging at T-Mobile store as this happened again. Sorry about posting this. I searched using my comp and found a whole thread about sod.
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Is your smart-cover kind of... stupid?

Like this?
http://www.youtube.com/watch?v=4sGNwF_G16s
Mine was and at first I blamed the case. But it does it with every case. So i was thinking of returning it. But then I got this email from Poetic(i had slammed them on Amazon with a one star rating). It said:
We would also like to inform you that if you face any issue regarding wake up function mostly when you open the case we request you to please check your WIFI Connection (to make sure you are successfully connected to WIFI). If your WIFI connection is disabled or not connected to WIFI Successfully, then your device won’t wake up all the times. This is not the issue of the case itself.
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I tried turning my WIFI on and connecting, but it did not help. Then I tried with it off. Same problem. Now I am thinking I really need to return this thing, only to find out my friends does the same exact thing. So what the hell? Are they all doing this? Most? Only a few? I really do not want to return if all of them are gonna do it, and it would seem a software issue in that case. But if mines got hardware problems I really should return it.

My case has been working fine.
Sent from my Galaxy Nexus

Landara said:
Like this?
http://www.youtube.com/watch?v=4sGNwF_G16s
Mine was and at first I blamed the case. But it does it with every case. So i was thinking of returning it. But then I got this email from Poetic(i had slammed them on Amazon with a one star rating). It said:
I tried turning my WIFI on and connecting, but it did not help. Then I tried with it off. Same problem. Now I am thinking I really need to return this thing, only to find out my friends does the same exact thing. So what the hell? Are they all doing this? Most? Only a few? I really do not want to return if all of them are gonna do it, and it would seem a software issue in that case. But if mines got hardware problems I really should return it.
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Hate to say it but if you are on stock, I think the device crashes and does not power on with the cover anymore. I had that issue when I was on stock.
I've since moved to CM10.2 nightlies and the cover turns on the device every single time. No issues here.
Also, with CM10.2, no more random reboots. You owe it to yourself to get off of stock.

There definitely is an issue with having wifi on and no access point around w/r/t magnetic on
I've seen this on a couple of units

Here are the symptoms with my cover:
* It never fails to put my tab to sleep.
* With wifi off, it rarely wakes up my tab. With wifi on, it wakes up the tab quite often... unless the Tab went to a deep sleep.
* When plugged in (PC or charger), it works beautifully, wifi on or off.
So it's hard to point the finger to Poetic.
There are plenty of people who don't have any issue.
I have replacement coming from the Amazon seller, so will see.

Open your case and WAIT...
so far mine always turns on... BUT it may be delayed by 10-15 seconds.
(by that time most of us have closed/re-opened the case a few times).

Mine works like a charm, I cycle through every Locket ad in like 30 seconds using my cover lol

Mine fails perhaps 20% of the time. It can't be a cover issue though, because the cover is constant.

Just tested my Moko ultra slim case on CM kanged and it turns on and off like a champ. Quick and no delay. No reboots either. So for me it was a software issue.
For you, flash CM and see if it is. If you still have the problem on CM then exchange it.
Sent from my Nexus 7 using XDA Premium 4 mobile app

Mine works fine with CM10.2 as long as WiFi is always on. If WiFi is set to turn off when sleeping it will not turn on after 15-20 minutes.
Sent from my Nexus 7 using xda premium

I posted about this same issue here: http://forum.xda-developers.com/showthread.php?p=44926734
Sometimes it will wake up after a delay (20-30 seconds) and sometimes it will just sit there until I press the power button. My first gen N7 never had this problem. I really don't want to let my WiFi run 24/7 just so my tablet will wake up.
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RKight said:
I posted about this same issue here: http://forum.xda-developers.com/showthread.php?p=44926734
Sometimes it will wake up after a delay (20-30 seconds) and sometimes it will just sit there until I press the power button. My first gen N7 never had this problem. I really don't want to let my WiFi run 24/7 just so my tablet will wake up.
Sent from my ADR6425LVW using xda app-developers app
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I have mine set to always on so it is ready through out the day and I manually turn WiFi out at night.
Sent from my Nexus 7 using xda premium

ncguy68 said:
I have mine set to always on so it is ready through out the day and I manually turn WiFi out at night.
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What's your battery life like, though? With light use, I can go a few days between charges.
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RKight said:
What's your battery life like, though? With light use, I can go a few days between charges.
Sent from my Nexus 7 using xda app-developers app
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WiFi seems to use very little power. I average about 10 hours of screen on time per charge.
Sent from my Nexus 7 using xda premium

I'm using the MoKo case and do not have any problems with the case not waking the device when opened. I must say though I did not purchase the case for this feature. The case construction is good, it fits the device perfectly and looks.well in place, and provides protection for the screen. For those reasons I am satisfied with it.

Just got a poetic replacement case, no improvement.
But (at this point) I think it's a tablet issue. If google knows they will fix it later, just like some people having multi-touch issue.

Even with my WiFi off, on CM, its perfect. Tested with WiFi off, even waited like 5 minutes and tested again with no issues. Probably a rom issue. Is this on stock with the latest version?
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player911 said:
Even with my WiFi off, on CM, its perfect. Tested with WiFi off, even waited like 5 minutes and tested again with no issues. Probably a rom issue. Is this on stock with the latest version?
Sent from my Nexus 7 using XDA Premium 4 mobile app
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Mine is stock rooted, latest version, with a Moko case. If it sits idle for more than a few minutes, it will rarely turn on when the cover is opened. With short idle times, it will wake consistently. I may try CM eventually but, for now, I think I may just flash the Bulletproof kernel and enable the double tap to wake feature.
Sent from my Nexus 7 using xda app-developers app

For anyone having this issue, I found a thread on the Google product forums about this. That's apparently how they became aware of the other issues that have been reported. If you could, please post your problem in this thread: http://productforums.google.com/forum/m/#!category-topic/mobile/android-devices/8MTpqfFmw8Q
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zim2dive said:
Open your case and WAIT...
so far mine always turns on... BUT it may be delayed by 10-15 seconds.
(by that time most of us have closed/re-opened the case a few times).
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Hahahahaha 10-15 seconds. STOP acting like that's NORMAL.
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