Database Users

[Q] Galaxy S4 restarts every 10 minutes

Well for starters, high everyone!
I have an issue with my S4 and I've searched all over but none of what has been recommended helps.
The issue I have is that my phone will restart about every 10 minutes (give or take). I used Reboot Logger to determine this. The phone only restarts when it is idle. It WILL NOT restart if I am using it (screen is on). The weird part is that it doesn't even go through the whole reboot sequence. The screen will stay black the entire time. The notification button pulses and the home buttons will light up like it was restarting though.
I had a bad battery and had it replaced with a stock Samsung battery. I've tried pulling the SD card, pulling the battery for 10 minutes, pulling the battery while the phone is on, and I've performed two factory resets.
The one thing I have noticed is that, after performing the factory reset, I get an "error" under the little android dude. This also happens if I do a cache wipe.
My model is the SPH-L720 running on android v4.3. The phone has never been rooted and there are no software or firmware updates that are found.
I was beginning to think that this was a hardware issue but the consistency in reboot intervals makes me believe otherwise. At this point I'm at a loss. I rooted my old phone but my experience in that area is very limited. I have read that the cache partition is bad from the factory on some of these (hence the error message) so I was thinking about rooting the phone and trying to use a good cache partition, but that's the only other option I could think of.

sounds like a voltage prob....or mem prob... id redownload a new rom..wipe wipe wipe..reinstall and that should fix it
Sent from my SPH-L720 using xda app-developers app

Insufficient voltage at idle was my first thought too, but if you haven't undervolted (since you aren't even rooted), that seems less likely. If I were you, I'd root the phone so I could do more to figure things out. Maybe try bumping up the voltage a little on the lower clock speeds.

Ok, first of all, do not root your phone. As you admitted yourself, you have limited experience in this area, and there is nothing that rooting will do for you. Not to mention, if you think you have a bad cache partition, you don't need root to fix it. Your phone is stock, running the stock kernel, there is no reason to suspect voltage issues that are not hardware related. If you root the phone, you will likely trip KNOX, and void your warranty.
My personal opinion is that your phone has a hardware problem. If you want to truly start over, either recover your phone through KIES, or better yet, download and flash via ODIN a stock MK2 ROM from this forum. Since this is a stock, signed ROM, you will not trip KNOX, and it will rewrite every partition properly on it's own. This is all assuming you don't have a hardware problem. But do not go ahead and try to fix anything yourself besides what I mentioned. You will not succeed, and likely lose your warranty in the process.
Edit: did you buy this phone new or used? If you bought it used, more than likely somebody ruined it for you. And more than likely, you can fix it. If this was a new device, more than likely it will be a warranty issue. That's why you shouldn't do anything to void the warranty.

If you're going to use odin for anything, just make sure you follow someone's directions step by step. Otherwise very bad things can happen.

im also having a slightly similar problem
Problem : The screen after a sleight amount of time of being on, or sometimes instantly when opening the lockscreen it freezes for 10-15 sec then shoots black lines across it, then reboots.
Things ive tried :
1. Installing a new rom ( from AOKP 4.4 and Triforce 4.3)
2. Changing modem (from MJA, MK2, NAE)
3. Changing the type
of Gapps i was using. (4.3 gapps for triforce, aokp 4.4 gapps, and pa gapps)
Current Phone Info:
Rom: aokp_jfltespr_kitkat_nightly_2014-02-08
Modem/Firmware: NAE
Gapps: Pa.gapps 4.4.x
Let me know if you need anything more! plz!

I'll look into Odin before I root. The phone was also purchased new. I spent most of today monkeying around with different settings to see if I could trigger the issue as well. As it turns out, the phone will only restart at idle if it's plugged into the charger, or the wifi is on. If wifi is off and it's not plugged in it's fine. I am also using the stock Samsung charger that came with the phone. Again though, if I'm actively using the phone it doesn't happen (charging or connected to wifi). I did turn the phone off earlier to charge it but would keep freezing at the sprint logo upon boot up. I thought it was bricked for a second... I wiped the cache (didn't do a factory reset) and that fixed it, but now I have that stupid issue where videos won't play on wifi, only on 4G or 3G. It's an issue I thought I had solved.
Le sigh. This is frustrating. The Odin option is looking to be my best bet it seems.

Tizamarou said:
im also having a slightly similar problem
Problem : The screen after a sleight amount of time of being on, or sometimes instantly when opening the lockscreen it freezes for 10-15 sec then shoots black lines across it, then reboots.
Things ive tried :
1. Installing a new rom ( from AOKP 4.4 and Triforce 4.3)
2. Changing modem (from MJA, MK2, NAE)
3. Changing the type
of Gapps i was using. (4.3 gapps for triforce, aokp 4.4 gapps, and pa gapps)
Current Phone Info:
Rom: aokp_jfltespr_kitkat_nightly_2014-02-08
Modem/Firmware: NAE
Gapps: Pa.gapps 4.4.x
Let me know if you need anything more! plz!
Click to expand...
Click to collapse
Since you are running a custom source-built ROM, first thing to do would be to ODIN a stock ROM. If the problems go away, you have your answer. If not, this would likely be a warranty issue. Of course you tripped KNOX most likely already.

sputnik767 said:
Ok, first of all, do not root your phone. As you admitted yourself, you have limited experience in this area, and there is nothing that rooting will do for you. Not to mention, if you think you have a bad cache partition, you don't need root to fix it. Your phone is stock, running the stock kernel, there is no reason to suspect voltage issues that are not hardware related. If you root the phone, you will likely trip KNOX, and void your warranty.
My personal opinion is that your phone has a hardware problem. If you want to truly start over, either recover your phone through KIES, or better yet, download and flash via ODIN a stock MK2 ROM from this forum. Since this is a stock, signed ROM, you will not trip KNOX, and it will rewrite every partition properly on it's own. This is all assuming you don't have a hardware problem. But do not go ahead and try to fix anything yourself besides what I mentioned. You will not succeed, and likely lose your warranty in the process.
Click to expand...
Click to collapse
Alright I'm a little confused as to what exactly I should be using. I found this:
http://forum.xda-developers.com/showthread.php?t=2575470
which is a stock ROM. Although I also found this:
http://forum.xda-developers.com/showthread.php?t=2259513&highlight=odin
which is the stock firmware.
Which one do I use, or do I use both of them?

Dfeeds said:
Alright I'm a little confused as to what exactly I should be using. I found this:
http://forum.xda-developers.com/showthread.php?t=2575470
which is a stock ROM. Although I also found this:
http://forum.xda-developers.com/showthread.php?t=2259513&highlight=odin
which is the stock firmware.
Which one do I use, or do I use both of them?
Click to expand...
Click to collapse
Neither. Use this one : http://forum.xda-developers.com/showthread.php?t=2601443
Follow instructions in the thread. This is a completely stock rom with no root or mods and will not trip the Knox bootloader. If you flash anything other than this, including custom recovery, cf autoroot, etc, you will void your warranty.

rebooting
i had this problem once and it was related to a corrupt file on my sdcard believe it or not. there are Defraggers out there for your android file system and internal SD card but your Ext sc you would have to do on your PC. it worked for me. the one i used is called CLEAN i got it off amazon app store.
cyberweasal
Dfeeds said:
Well for starters, high everyone!
I have an issue with my S4 and I've searched all over but none of what has been recommended helps.
The issue I have is that my phone will restart about every 10 minutes (give or take). I used Reboot Logger to determine this. The phone only restarts when it is idle. It WILL NOT restart if I am using it (screen is on). The weird part is that it doesn't even go through the whole reboot sequence. The screen will stay black the entire time. The notification button pulses and the home buttons will light up like it was restarting though.
I had a bad battery and had it replaced with a stock Samsung battery. I've tried pulling the SD card, pulling the battery for 10 minutes, pulling the battery while the phone is on, and I've performed two factory resets.
The one thing I have noticed is that, after performing the factory reset, I get an "error" under the little android dude. This also happens if I do a cache wipe.
My model is the SPH-L720 running on android v4.3. The phone has never been rooted and there are no software or firmware updates that are found.
I was beginning to think that this was a hardware issue but the consistency in reboot intervals makes me believe otherwise. At this point I'm at a loss. I rooted my old phone but my experience in that area is very limited. I have read that the cache partition is bad from the factory on some of these (hence the error message) so I was thinking about rooting the phone and trying to use a good cache partition, but that's the only other option I could think of.
Click to expand...
Click to collapse

sputnik767 said:
Neither. Use this one : http://forum.xda-developers.com/showthread.php?t=2601443
Follow instructions in the thread. This is a completely stock rom with no root or mods and will not trip the Knox bootloader. If you flash anything other than this, including custom recovery, cf autoroot, etc, you will void your warranty.
Click to expand...
Click to collapse
That solved my problem, thank you! I spent the last couple days testing it just to be sure I wouldn't be crying wolf. The phone has yet to restart on me even while charging or using wifi. The error message I would receive after a cache wipe or factory reset went away as well. It makes me wonder if the bad partition was what caused my old battery to fail.

Dfeeds said:
That solved my problem, thank you! I spent the last couple days testing it just to be sure I wouldn't be crying wolf. The phone has yet to restart on me even while charging or using wifi. The error message I would receive after a cache wipe or factory reset went away as well. It makes me wonder if the bad partition was what caused my old battery to fail.
Click to expand...
Click to collapse
Great, I am glad it worked out, and hopefully your problem is resolved. I doubt that your old battery failed due to a bad partition, and I have to wonder how your partition got messed up in the first place, but that's just a curiosity and is irrelevant in the grand scheme of things. Just remember that if you decide to root, cf_autoroot works but will trip the KNOX bootloader and potentially void your warranty.

[N910F]Random reboots (links to logs included)

Hi,
My N910F has recently been acting weirdly. It either randomly reboots itself, or just freezes for several seconds when switching screens or scrolling/tapping buttons. This started a couple of weeks ago on stock 5.0.1 (this version, I think) running Emotion kernel. This was running fine for a while; I didn't flash any new mods during this time, although I did switch between AEL kernel and Emotion once or twice without much success.
Thinking it was just one of those situations that called for a clean slate; I backed up my important stuff, booted into TWRP to wipe all partitions, then flashed stock 5.1.1 via Odin (this version, which I'm currently running). But even before I rooted it once again the phone was displaying the same aforementioned symptoms, both during and after going through the built-in setup wizard. This behaviour continued after flashing TWRP and AEL kernel v8.2, which I'm currently on at the moment. If it makes any difference I've also noticed that the lower my battery level, the more often it reboots itself. The battery level also "yo-yos" sometimes, usually at lower levels.
I've uploaded the relevant logs as advised elsewhere for anyone who can decipher them, as I otherwise don't know what to look for. This includes my last three kmsg dumpstate logs (just in case it's a slightly different cause each time), as well as my logcat and dmesg files (whatever they are lol) which I got using the SysLog app.
Any help would be appreciated, and if you need any more info please let me know.
Thanks .

*bump*

I have the same problem. Help would be highly appreciated. : )

*bump*
[UPDATE]: Once or twice when it's crashed as above, it would try and boot again but then reboot into download mode with the following text at the top of the screen above all the other info:
Code:
Could not do normal boot.
ddi: mmc_read failed
If I then pull the battery and turn it on again, it boots up as normal (at least until the next crash). Is this something that can be fixed with a fresh flash in Odin (or some other method), or is my phone on the way to its death?

Got the same issue + loses Wifi password after random reboot. Sent the phone back to the operator I bought it from 1 week ago and they did a repair. They replaced the USB-flex, did a firmware upgrade(?? ..was already updated to latest) and sent it back. I got it this morning and at first the phone now works fine and no more "mmc_read fail". But after some time the random reboots started again. Not so often now but still 4 times over the day and twice the wifi-password is lost and I had to retype it. Now I'm on the fence and just waiting for the first mmc_read fail" to happen before I complain and send it back for a second repair. I can not imagine this beeing beeing other than a hardware fail coming from a weak spot on the phone. I got the impression many people has the same issue and it really comes to life after upgrading to 5.1.1.
I also think the problem at the service shop ist that they just do a quick system test on a clean wiped phone and can't find the issue and think the phone is fine. After reinstalling my 200 apps and setting up my phone all over again, the workload causes the issue to reappear and I now have to ask the service shop for a deeper check. They accepted this as a warranty fix all though my phone has a knox trip (0-1)x4...

I've also faced random reboots on Lollipop. How i solved that? Simple. I downgraded to Kitkat. Lollipop still having lots of battery drains and bugs even on 5.1.1

[UPDATE]
I've decided to go through my network provider to get a replacement sent out to me, which they were happy to do after going through their line of questioning over the phone ("have you tried turning it off and on again", "did you try taking out your memory card and see if that helped", "did you try doing a factory reset", etc). They say it will get here tomorrow so fingers crossed for the replacement.

The ddi mmc_read fail has not reappeared yet..
It's strange.. Lately the random reboots are not wiping my wifi passwords anymore, but now after every random reboot the multiwindow is enabled and I've got to untick it in quick settings..
Latest: It seems that the random reboot may come from heavy account sync workload. I did have 5 Google accounts syncing on my phone + 6 excange accounts and when i disabled syncing alltogether the phone ran a lot smoother and the reboots stoped. So i deleted all Google accounts except my main account and for now thing seems to be fairly stable. I've also uninstalled all for me unimportant 3'rd party apps, reducing 3'rd party app count from aprx 200 to 150..
If things develop further I'll come back with more
Sent from my ****in' phone!

Thanks fot starting this thread Jointfcfan...i am using 910P and have same issue of your post 1 and 4!!!!
Loosing hope on Samsung, it is really frustrating...
Tried cleaning cash, dalvic, reboots, on latest 5.1.1 k version...frozen all not neede games and apps ...only 1 google and 1 exchange account no auto sync
At next stage while rebooting it sometime going an error stating kernel panic and i have to pull battery to restart

Replacing USB-flex board at service shop has cured the "ddi. mmc_read fail" boot issue for good.
So to me it seems that when many people experiences this, the USB-flex board may have a built in design flaw making it a weak spot on the Note 4.
Also I found that the phone works A LOT smoother if using Nova launcher instead of TW. Random reboot count is way down and phone works almost normally. Still some lag, mostly when unlocking screen, but reboots happens only 2-3 times a day now. Still random rebooting enables "multi window" option every time..
I've also rooted the phone now using CF-autoroot. I've flashed Philz CWM recovery and using it to install Wanam Xposed. So now I can run Greenify properly in Xposed mode and automaticly hibernate apps including system apps..
NB! Be aware, flashing root and custom recovery trips Knox counter 0x1 permanently and MAY void warranty
I have also mailed my operator asking them to take in the phone a second time for check/repair, alt. replacing the phone. I guess when they did system check 1st. time without issues after replacing the USB-flex, it was done when phone was reset to factory and under no significant workload.
Sent from my ****in' phone!

SM-N910G Stock - Contently freezing, restarting to download mode and data lose

Hey all,
I found few similar threads, but none of the solutions worked for me. So here's my situation
Problem : N910G Singapore Starhub, used for more than 1 and half years without major issues. Suddenly started to randomly freeze and then restart.
Got worse very quickly. Started to get freezed at Samsung logo. Most of the time had to remove the battery to re-try booting.
What I've done so far:
Cache cleared -> Didn't work
Factory reset -> Was ok with less lag (Freezing) for sometime, then same again
Installed TWRP. Flashed PIT file. Following an XDA post, flashed Samsung stock Android 6 released to India -> Was ok for couple days, was better than 5.1 in terms of responsiveness and battery life. After few days, again freeze. restart
Flashed with stock 5.1 released for the correct region. -> freezing, restarts. Wifi passwords are not getting saved (Have to re-enter upon restart). Restarts end up in download mode. very rarely passes the Samsung logo
Rooted and tried to change build prop ro.securestorage.support (or something similar) and see whether passwords are getting saved -> Still passwords are not getting saved. /efs is accessible.
Now the device never boots properly. Some apps are missing after restarts. Always ends up in download mode. Recovery is working fine though.
You guys have any idea what else I should try before throwing this away?
Thanks in advance.

cyclo.sl said:
Hey all,
I found few similar threads, but none of the solutions worked for me. So here's my situation
Problem : N910G Singapore Starhub, used for more than 1 and half years without major issues. Suddenly started to randomly freeze and then restart.
Got worse very quickly. Started to get freezed at Samsung logo. Most of the time had to remove the battery to re-try booting.
What I've done so far:
Cache cleared -> Didn't work
Factory reset -> Was ok with less lag (Freezing) for sometime, then same again
Installed TWRP. Flashed PIT file. Following an XDA post, flashed Samsung stock Android 6 released to India -> Was ok for couple days, was better than 5.1 in terms of responsiveness and battery life. After few days, again freeze. restart
Flashed with stock 5.1 released for the correct region. -> freezing, restarts. Wifi passwords are not getting saved (Have to re-enter upon restart). Restarts end up in download mode. very rarely passes the Samsung logo
Rooted and tried to change build prop ro.securestorage.support (or something similar) and see whether passwords are getting saved -> Still passwords are not getting saved. /efs is accessible.
Now the device never boots properly. Some apps are missing after restarts. Always ends up in download mode. Recovery is working fine though.
You guys have any idea what else I should try before throwing this away?
Thanks in advance.
Click to expand...
Click to collapse
If you know how, I'd use Odin to restore the factory image if you're running the factory software. Performing a hard reset is always the best way to go, however if you're still having problems then I'd download the latest firmware from Samsung's firmware site and then Odin.
Developers don't need no stinkin' signature!
If I've been able to help you, please hit the "Thanks" button. *

Android.Ninja said:
If you know how, I'd use Odin to restore the factory image if you're running the factory software. Performing a hard reset is always the best way to go, however if you're still having problems then I'd download the latest firmware from Samsung's firmware site and then Odin.
Click to expand...
Click to collapse
Thanks for the reply Android Ninja. As the last resort, I did flash the correct stock firmware which I downloaded from Sammobile. But it didn't really fix the issue. So should I unroot and use Kies instead? Because I can't find a way to download the fireware from Samsung, if that's what u meant. thanks

Freezing and rebooting

Classic "my phone keeps freezing and rebooting". I am quite in the know about flashing roms and such.
It started on the stock firmware 6.1.1 (i think it was). I dd factory resets, cache wipes the lot. It would still randomly reboot.
So i flashed Telstra version of 7.0. Still froze every now and then. Did the same things as above.
Flashed TWRP and wiped everything, flashed Renovate Rom and the bootloader for it, Still did it. Numerus factory resets and wipes of everything. It would freeze at any point from startup, to having setup the phone and making phone calls or on facebook or whatever. It would even freeze in twrp, or loading twrp.
I found that the data partition was corrupt so i re partitioned to ext4. Still nothing. I reformatted every partition so the phone was a complete brick with nothing on it and after flashing clean again it would still do it.
Whats the issue that I'm missing, or is there a way to log so i can find where it keeps getting stuck? It gets hot and blue light flashes and i have to hard reset it or sometimes i have to let the battery drain so i can turn it back on again.
pls help?

Hmm i will give you an advice so you dont have to wait for your battery to drain...just press volume down and power button for like 5 secs and phone will force boot. Anyway back to your problem...did you tried flashing latest stock samsung firmware?

raz_il_dio said:
Hmm i will give you an advice so you dont have to wait for your battery to drain...just press volume down and power button for like 5 secs and phone will force boot. Anyway back to your problem...did you tried flashing latest stock samsung firmware?
Click to expand...
Click to collapse
This advice doesn't work with my phone even with holding the buttons for 30 secs and more. For rebooting I can only wait until the battery is completely drained. With little hope for another way shortening time to the next reboot any help is appreciated.

Same here...experiencing the same prob...

Same problem.
Sent from my Redmi Note 4 using Tapatalk

smallcapsicum said:
Classic "my phone keeps freezing and rebooting". I am quite in the know about flashing roms and such.
It started on the stock firmware 6.1.1 (i think it was). I dd factory resets, cache wipes the lot. It would still randomly reboot.
So i flashed Telstra version of 7.0. Still froze every now and then. Did the same things as above.
Flashed TWRP and wiped everything, flashed Renovate Rom and the bootloader for it, Still did it. Numerus factory resets and wipes of everything. It would freeze at any point from startup, to having setup the phone and making phone calls or on facebook or whatever. It would even freeze in twrp, or loading twrp.
I found that the data partition was corrupt so i re partitioned to ext4. Still nothing. I reformatted every partition so the phone was a complete brick with nothing on it and after flashing clean again it would still do it.
Whats the issue that I'm missing, or is there a way to log so i can find where it keeps getting stuck? It gets hot and blue light flashes and i have to hard reset it or sometimes i have to let the battery drain so i can turn it back on again.
pls help?
Click to expand...
Click to collapse
Sounds like you need your motherboard replaced i had the same issues on marshmallow thought the nougat update would fix it but realized it was a hardware fault not software..left it in store to get fixed and on repair sheet it said faulty motherboard..
Sent from my SM-G935F using XDA-Developers Legacy app

As i know some S7 have motherboard hardware problem, mine has too, what help? warranty and they replaced motherboard. But if you root, you can say good bye to warranty, they look at knox first with this problem.

N910F stock crash and bootloop after 6.0.1 update

Hello people of the world,
after reading a lot of posts here I still can't fix my phone's issues, so I need to post. Bear with me...
I have an N910F which was entirely stock and functioning without problems. Two days ago I accepted the official update. After that, the phone regularly lost connection to the mobile net, froze, and restarted. It would work for a short while until it froze and restarted again and again. When I tried to use the camera, the live picture was completely distorted. The phone crashed and has then gone into a bootloop.
I pulled the battery, did a recovery start and wiped the cache. No difference. Factory recovery next, no difference.
I have since tried several stock and custom firmwares, always taking care to follow instructions and use the correct bootloaders, modems, etc. TWRP is working.
When I flash a stock firmware, it will go into a bootloop. With any custom ROM, it will crash during startup (logo) and switch off.
Any help would be greatly appreciated!

Protect the eMMC?
So, after more reading I began to suspect that the eMMC had moved on to the valhalla of electronics. Sent my phone to service where my suspicion was confirmed. Luckily, they were able to replace the chip without having to put in a new board.
Is there any way to prevent this kind of failure again, or at least make it less likely?

Yes this is a known issue after latest update you could you install only one application called wakelock so that your phone doesn't reboot and CPU keeps awake

nicholes said:
Yes this is a known issue after latest update you could you install only one application called wakelock so that your phone doesn't reboot and CPU keeps awake
Click to expand...
Click to collapse
Thanks! I had read about that.
Got my phone back from service today, they had flashed stock 5.0.1. After checking that it worked I flashed RR 5.8.4 and installed Wake Lock Powermanager. I searched for a comprehensive tutorial on what the settings do and which to use. Right now I set it to PARTIAL_WAKE_LOCK (4) but I'd like to read more about it. Any tips on that?

tullian said:
Thanks! I had read about that.
Got my phone back from service today, they had flashed stock 5.0.1. After checking that it worked I flashed RR 5.8.4 and installed Wake Lock Powermanager. I searched for a comprehensive tutorial on what the settings do and which to use. Right now I set it to PARTIAL_WAKE_LOCK (4) but I'd like to read more about it. Any tips on that?
Click to expand...
Click to collapse
installing power wakelock and setting up on partial wake lock is enough.if you get trouble in starting your phone remove its battery and put your phone in refrigerator for five min.and try to start your phone.this problem also related and happens after the latest update