yashsingh1/xdaforums huggingface dataset:
[Galaxy S II Q&A, Help & Troubleshooting] furyoflight1029:
Samsung galaxy i9100 reboot

Hi everyone, I'm new here but I'd like to share my experience as it might be helpful for others. I bought a new Samsung galaxy s 2 and after the first week i started experiencing auto reboot when I'm listening to musics with the default music player. I read a lot of other people's opinions online and on this forum( even this entire thread). Well, i fixed my auto reboot problem by downloading a music player app(winamp) from the market. Before using winamp, my phone would reboot in the middle of a song or sometimes the song would randomly pause. Right now i havent experienced another reboot yet but it doesn't mean it's cured, but it'll be determined over time. It seems like my problem isn't caused by SD card as many people have referred to, because I'm using it and it's working fine. Fyi, I'm on version 2.3.3. Hopefully this would be helpful, take care.
[Galaxy S II Q&A, Help & Troubleshooting] irvinehooi:
Flashed back to Android 2.3.3

Previously I'm in Android 2.3.3 (DXKI2) and I had my phone reboot issue after updated to Android 2.3.6 (DXKL3). It started to happen after 1 or 2 weeks of using it. The phone will only reboot with WiFi connection enabled (connected) and the phone is in idle mode (locked screen & sleep).

Done the factory reset and also reflashed the same Android 2.3.6 by the Samsung service center still no help.

I finally rolled back to Android 2.3.3 (DXKI2) by using ODIN3. Because previously I had no issue at all before updated to Android 2.3.6 (DXKL3) even with SD Card inserted & WiFi enabled all the time. And until now my phone has an up time running around 495++ hours already.

I highly recommend that those who had the phone restart issue please roll back to the version which it's working fine / no problem to your device.

Thanks.
[Galaxy S II Q&A, Help & Troubleshooting] gigiolo:
I wanted to know if you had version 2.3.4 reboots ...?

before I had the 2.3.6 xila3 odin then I switched to 2.3.4 ....

yesterday after a long time I had to reboot ...
[Galaxy S II Q&A, Help & Troubleshooting] a67543210:
Spontaneous reboots are caused by moving large amount of apps to SD. I'm on latest ICS and still get that.

Solution:

Switch off your phone and allow it to cool for about 3 mins. It should now not reboot.

Note: for some reason, the SD card area stays too warm after too many apps have been moved to SD. You may experience these reboots also

If you do a firmware non wipe upgrade, upon first boot.

Solution:

1-boot into recovery, clean/format cache

2-Allow memory card area to cool down for about 3 mins.

Reboot

You may choose to move back all your apps to internal memory and no reboots. If your internal is full as mine is, the above will work.

Finally, Google needs to address the software as to why the SD card(area) heats up upon moving large number of files to SD.
[Galaxy S II Q&A, Help & Troubleshooting] Sky-Dexter:
Not always, because i removed my SD card 2 weeks ago and i keep getting random reboot (the phone is up from 2mins to 30mins..)

My actual 2.3.3 rom is also totally brand new, no google account no sync no app (and no sd card). Still it reboots.

( But you are right, removing the SD card can solve many problem and it's the easiest thing to try )
[Galaxy S II Q&A, Help & Troubleshooting] gigiolo:
but with 2.3.4 there may be restarted???
[Galaxy S II Q&A, Help & Troubleshooting] john_jaysee:
Micro SD card is causing a reboot

I have a SGS2-GT-I9100, version 2.3.6, with the latest firmware, never had a reboot before until I insert a SanDisk micro SD card to the phone. I have tried to reformat the phone and also the SD card but after a few days, my phone reboot itself.

The reboot happens specifically around 11 - 12 PM almost everyday until I remove the SD card.

I can only believe that it was the SD card that is causing the reboot, perhaps it is just a faulty SD card.

* The phone is always idle when the reboot happen.

* remove SD card. not a single reboot.
[Galaxy S II Q&A, Help & Troubleshooting] irvinehooi:
SD Card could have it issue itself. But be sure to get the card from a well reputated store. Previously I had Samsung 8GB Class 2 with no problem at all on my SGS2. Right now I've upgraded to SanDisk Ultra 16GB UHS-1, it perform very smoothly on my SGS2 and never causes any issue so far.

To my experience when the time I upgraded to 2.3.6 (DXKL3), whether or not the SD Card inserted to the device it will still randomly reboot by itself. The only choice is to switch off the wifi, then it will not reboot. That's why I rolled back to 2.3.3 (DXKI2).

What I had and what I've flashed so far on my SGS2 is all official stock rom not the custom rom. I will never use custom rom on my SGS2.

To report the status, I'm now had 660++ hours up-time already.
[Galaxy S II Q&A, Help & Troubleshooting] avossen:
Problem gone after update

After the latest firmware update to Android version 4.0.3 I did not have any reboots anymore for more then a week.
[Galaxy S II Q&A, Help & Troubleshooting] fruchle:
Another rebooter here.

Vodafone AU

both 2.3.5 AND 4.0.3

Kingmax 16GB class 10 microSD card

ONLY on low power (arbitrarily say... under 70%)

Flight mode ON stops reboots

only reboots when the SD card is in

have uninstalled most all apps mentioned in this thread, but still have a lot of games, etc installed on the card.

experience the same overheating and crazy power drain others have.

Temp solutions:

turn off phone, charge fully, turn on.

remove SD card

turn flight mode on

SOMETIMES (rarely) taking the battery out, waiting a couple min for it to cool down, and then putting back in works.

I THINK that as soon as the phone tries to sync* an app stored on the SD card is when it crashes.

* sync: update? check online? something like that.

Haven't had a problem with App2SD (though got rid of it just in case)
[Galaxy S II Q&A, Help & Troubleshooting] fruchle:
In ICS, under Settings -> {} Developer -> Force GPU rendering

If that is ticked, it greatly decreases stability.
[Galaxy S II Q&A, Help & Troubleshooting] betimi91:
I did everything formating for more than 20 times with odin trying sam mobile roms etc but always this sh... reboots sometimes it goes uptime to 1 day but again it will reboot or freeze...

Its making me nervous like hell and I am not using external SD
[Galaxy S II Q&A, Help & Troubleshooting] mande01:
me too

can someone review for me please,

And if you have time explain why?

thanks,

der
[Galaxy S II Q&A, Help & Troubleshooting] Ricline:
I have the same spontaneously reboot's and I try that and the phone are very instable.

That means a software insue right?
[Galaxy S II Q&A, Help & Troubleshooting] irvinehooi:
Hi everyone I just want to check with you, has anyone upgraded Galaxy S2 to latest Android 4.0.4 (ICS) ??

If yes, can someone confirm whether the random reboot issue is still there ??

Thanks in advance.
[Galaxy S II Q&A, Help & Troubleshooting] jay448:
Hi men. Sinds i installed the latest software (4.0.4) my randomly reboots are totally gone. Now I can enjoy my phone without random reboots.

Hope this helps you.

Jay
[Galaxy S II Q&A, Help & Troubleshooting] Stileth:
I am on 4.0.4 too and already had one reboot :-(

Odoslané z GT-I9100 cez Tapatalk 2
[Galaxy S II Q&A, Help & Troubleshooting] irvinehooi:
Just want to ask, are you using the official firmware or the custom firmware for your Android 4.0.4 ??

Thanks.
[Galaxy S II Q&A, Help & Troubleshooting] Stileth:
The official one. No changes except root.

Odoslané z GT-I9100 cez Tapatalk 2
[Galaxy S II Q&A, Help & Troubleshooting] riorim:
I experienced random reboots with my sdcards (tested noname +samsung) on all stock GB versions (from 2.3.4 to latest 2.3.6 WLA4) but the problem has totally gone the day I went on stock ICS a few months ago. Currently on XWLPI for a few weeks and no reboot with my sdcards.

Envoyé depuis mon GT-I9100 avec Tapatalk
[Galaxy S II Q&A, Help & Troubleshooting] aperception:
I used to get reboots every day whenever I inserted an SD card, but it seems to be OK after updating to stock 4.0.3
[Galaxy S II Q&A, Help & Troubleshooting] irvinehooi:
Nice. Great to hear that the problem been solved after updated to ICS.
[Galaxy S II Q&A, Help & Troubleshooting] riorim:
I also tried CM 7.2-stable which is based on GB and I didn't experience any reboot with my SD card (tested for a few days, though)

According to me this reboot problem was a specific problem within samsung GB stock roms.

NB: I'm waiting for CM 9-stable so I can definitly get rid of crappy ICS stock roms (remember exchange bugs, wifi problems, etc.)
[Galaxy S II Q&A, Help & Troubleshooting] aperception:
It would be good to hear from some of the users that only experienced reboots when they *moved apps to the SD card* though. In my case I was getting reboots from just inserting an SD card, which may or may not be the same bug.
[Galaxy S II Q&A, Help & Troubleshooting] Edge-Case:
Sorry to bring back a year old thread.

A friend of mine has this phone with no warranty. It is Boost Mobile stock unrooted. He tried a factory reset and that didn't work.

I tried to catch the logcat during a reboot but while connected to the computer for several hours it never rebooted ( maybe because it had solid power connection?). I sent him a message to try the paper thing out till I can get into town with my laptop.

I really don't think this has to do with full RAM, Linux is very good with RAM and under most circumstances, unless their is a memory leak from bad software, the Linux kernel will release unused RAM to free space for a new processes. Android's patches to the Linux kernel are supposed to improve this for low memory embedded devices, such as phones by using priorities. In all, don't clear your RAM, it's a waste to not use it, but do stop background apps that have not closed and may still be using CPU resources (which would slow down other processes). --my 2 cents, correct me if I am wrong.

I want to confirm with other S2 users if this the ROM/firmware and/or the battery being lose related.
[Galaxy S II Q&A, Help & Troubleshooting] aemilius88:
Hey. I started having this problem a couple months ago. I seem to have narrowed it down to either a problem with:

1. Battery connection to phone or other voltage related problems.

2. SD card, damaged hardware, corrupt data or software bug related to apps using SD card.

3. Damaged RAM or other internal component.

The reboots on my phone are often preceded by glitching audio and the OS becoming completely unresponsive. This is noticable when using Spotify and listening to music. When the audio starts glitching I have found that unplugging the headphones restores the phone and cancels the reboot. This is because pulling out the headphones automatically pauses music playback. All my music is stored on the SD card, which makes me believe the problem might be related to that. I do not know yet if there are two separate reboot bugs I am encountering, because the phone does also reboot spontaneously, even if its isnt being used. It can be lying flat on a table and reboot randomly.

After the phone has rebooted a couple of things happen: No GSM/HDSPA works at all, only WiFi. The battery has dropped extremely much, sometimes up to 70% of battery disappears and the battery usage stats become bugged (rising battery level instead of falling). The GSM problem is fixed by me rebooting the phone again. The battery stats I dont know.

I DO know the problems arent related to android ROMs because I had the same problem while using Samsungs own ROMs as well as different CyanogenMod ROMs. The bug persists but the phone handles it a bit differently. On TouchWiz the phone would just go black and NOT reboot. Only fix was hard reset. On Cyanogen the phone behaves like I described earlier (choppy, lagging and ultimately rebooting).
[Galaxy S II Q&A, Help & Troubleshooting] Dannehkins:
I'm seriously concerned her. I am having the same issues, but I haven't used an SD card at all.

This phone can get very hot at times and so can the screen. I am very concerned that if it is burnt RAM, how could Samsung allow this to pass under their noses/
[Galaxy S II Q&A, Help & Troubleshooting] Phk:
Defective RAM can degrade fast over time.

Flash stock kernel. Test it. If it keeps rebooting, just RMA it ;)
[Galaxy S II Q&A, Help & Troubleshooting] functor:
I have the same problem, but it only seems to happen when I have Wifi enabled.

The first time it started happening, 7 days after I got it - I rooted it with the old firmware. I installed some basic apps (some games actually crashed due to incompatibility), and I started getting reboots and shutdowns.

Since I installed the new firmware it has been unrooted and only very minimal apps. I formated and it worked for 3 days - after which it rebooted once a day.

Yesterday I discovered it doesnt reboot if wifi is disabled.

I am thinking of RMAing, as only few people have this problem? Bad batch maybe?
[Galaxy S II Q&A, Help & Troubleshooting] arabbitte:
Mine too

My phone also reboots at times. It's a stock SGS2, delivered from expansys to me with KE7 on board.

I've seen in reboot when using the camera and/or playing back movies captured by it. I think it may also have rebooted when playing MP3s. It often reboots a little after I stopped using it. The reboots are not easily reproducable.

The camera stores everything on the internal storage, my MP3s are on a 32GB microsd card. I formatted the card on the phone before I used it and also did some testing with the utility (can't remember the name) that checks for speed and true storage capacity.

And thoughts or advice welcome.

Not impressed ...
[Galaxy S II Q&A, Help & Troubleshooting] amaya84:
Mine´s since I did a wipe. My sammy dont have rebooted any time. ;). I have XWKF1.
[Galaxy S II Q&A, Help & Troubleshooting] arabbitte:
Diagnostic Check

Does anyone have the "*#" code for a RAM test?
[Galaxy S II Q&A, Help & Troubleshooting] DJTaurus:
Mine rebooted once while i was changing mp3 tracks through the hands free :confused:
[Galaxy S II Q&A, Help & Troubleshooting] arabbitte:
And another one a few minutes ago (saw the Enter PIN message)

:-(
[Galaxy S II Q&A, Help & Troubleshooting] Kostask11:
I had random reboots when I was listening to music!!!

After a while, I figured it was due to a specific song( maybe it wasn't transferred good) and I deleted it! I've put it again and bam! no more random reboots! :D
[Galaxy S II Q&A, Help & Troubleshooting] Kostask11:
how did you change tracks using the hands-free? :confused::confused::confused::confused:

I've only figured pause-play! Please let me know if there is such thing! :D

Thanks in advance
[Galaxy S II Q&A, Help & Troubleshooting] DJTaurus:
Ελα ρε μαλακα :p......δοκιμασε με poweramp....κρατα παρατεταμενα το κουμπι στο hands free και μολις ακουσεις το διπλο μπιπ το αφηνεις και παει στο next track.
[Galaxy S II Q&A, Help & Troubleshooting] arabbitte:
Maybe the MP3 used an area of memory that was bad or something like that, but I'd find it hard to believe that an MP3 could crash Android. It would make a great virus!

I presume the Android OS "ringfences" its applications in such a way that a misbehaving app cannot take out the system?

Anyway, anyone know the answer to my question above: How to do a RAM test? I can't find anything in the various "*#" codes listed in other threads?

EDIT: I did some searching and found "StabilityTest v1.5" in the store. It's curently running away, testing both cores and the RAM. It's making the phone nice and hot (44C) too, so it is pushing it. Oh, and no reboots! I'm not sure if this is:

a good thing

a bad thing

?

I'll post an update later on in the afternoon, but I suspect it won't case a reboot. If I don't have a hardware problem and if applications are properly ringfenced from the OS - and therefore can't cause a crash - then what am I left with? Android 2.3.3 (KE7) itself? But if this was a problem for me on my standard, unmodded SGS2, then I'd have thought many others would have also seen this and this thread would be on fire?
[Galaxy S II Q&A, Help & Troubleshooting] arabbitte:
Can't make it go wrong!

48C and flat out for an hour with no reboots - here is a screen shot:

(Elapsed time low because I reset it accidentally when taking screenshot!)

Com'on, lots of views on this thread suggesting there is more than a few of us having the problem: Any thoughts on what the problem might be - hardware / software? :confused:
[Galaxy S II Q&A, Help & Troubleshooting] arabbitte:
Just spotted a similar thread where there is speculation about it being possibly battery-contact related.

Moderator - maybe these threads should be merged?
[Galaxy S II Q&A, Help & Troubleshooting] jbpf77:
I've had a few random reboots, always when listening to MP3s stored on an external SD card. No other processes running, and the phone is generally lying flat on the desk so it's nothing to do with the battery contacts.

It's not a full reset, it's more like an OS restart, as it stays powered up during it. Everything running shuts down, and then reloads.

I thought it might be a corrupted SD card, as the Kingston 8gb Class 4 SDHC card I was using recently died completely while in the phone, I rebooted while updating to CF4 and the got the message about the SD card being damaged, it's completely dead, won't even show up in Windows Explorer.

However, I've got a brand new Sandisk card, put it in two days ago and copied some MP3s to it, and I've just had another reboot while listening to music.

So it's either A: not SD Card related but something that the music player is doing or B: something is happening to my SD Cards while copying music onto them that's corrupting them, causing reboots..... or C: not related to music playback at all, and it's just a coincidence!
[Galaxy S II Q&A, Help & Troubleshooting] arabbitte:
I've had lots of reboots too, but earlier today I saw the fast "reboot" for the first time. The app I was using was writing to the SD card (an Expansys-badged 32 GB in my case) and froze. Soon after, I then got the "reboot" and all then appeared well. It's not a proper reboot because I didn't have to reenter the SIMM PIN afterwards.

My SD card is now removed and I'll see how I get on. If I don't see more reboots, I'll then have to experiment more to see if it is the card or the phone's ability to work with it ...
[Galaxy S II Q&A, Help & Troubleshooting] elminster13:
To add to the growing numbers; I too have this problem with the phone rebooting when listening to MP3s. I also have those on an external SD card. I'm running stock and non-rooted.

The problem manifested itself tonight whilst lying flat on the table in bar so I'm not inclined to believe its related to shock rather software (granted that is based on slim evidence).
[Galaxy S II Q&A, Help & Troubleshooting] MarkMcLovin:
Got the phone yesterday. Fine all day and I have since put in the SD card and went to bed.

On the way to work, I found the phone to be off but I couldn't turn it on. I had to pull out the battery, put it back in and it worked. It has literally just rebooted itself again, as soon as I got a message.

I've not played any music yet, but I have a feeling this random reboot is due to the SD card.

Has anyone found a fix yet?
[Galaxy S II Q&A, Help & Troubleshooting] shaharudeen:
mine did a few times

my phone rebooted a few times too, but i remember it being in my pocket...

at first i thought the silicon cover was the culprit be cause the silicon cover grips tightly and the power button needs to be to touched to turn on the phone...

i also tried long pressing the power button when it was on standby.. my phone switches off. so i was sold. i was almost certain it was due silicon cover...

the following day after removing the cover, it rebooted again while in my pocket. this time it actually switched off... sigh

i ran stability test for an hour. battery was heating up until 50degrees celcius.

it did not reboot or switch off

i have placed a piece of paper in between the battery n the phone to secure the battery contact now.

ive listen to mp3 music (files on internal memory card) using headphone for more than an hour.

so far it never rebooted or switched off.

i can only conform it in few days time, need to put it in my pocket to find out whether it switches off or reboots.

btw, running stability test for an hour without crashing can conclude nothing is wrong with my RAM?

SGS2 running DXKF1 stock rom, not rooted.
[Galaxy S II Q&A, Help & Troubleshooting] Mr_Q:
Having similar issues as you guys; while I did not even listen to any music yet.

My phone had this with the original firmware (XENKE7), but now I have flashed the custom kernel of ChainFire.

Since now, I am running 'logcat -f' in the background, waiting for a reboot to happen. If it happens, I should have a logfile on my SD-card with all the related info. When I have the cause of my reboots, I will let you know and show the log.
[Galaxy S II Q&A, Help & Troubleshooting] tangoownage:
I had random reboots and crashes. I had had battery drain issues too. It was all very random. After it caused my alarm to fail i researched quite extensively. Turned out there's a bad batch of phones, the ram is fubar.

Swapped to a few one and been using for 3 weeks and had zero reboots n crashes. No battery drain eithet
[Galaxy S II Q&A, Help & Troubleshooting] Mr_Q:
And the result..

I/DEBUG ( 2576): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr deadbaad

I/DEBUG ( 2576): r0 00000027 r1 deadbaad r2 a0000000 r3 00000000

I/DEBUG ( 2576): r4 00000001 r5 00000000 r6 47495818 r7 a82176ed

I/DEBUG ( 2576): r8 00122410 r9 008a0808 10 0000000d fp afd20a29

I/DEBUG ( 2576): ip afd46688 sp 474953c0 lr afd19471 pc afd15f40 cpsr 60000030

So it looks like it is bad ram.. I have created an RMA for the phone since I only have this phone a few days.... Have to restore my phone in the original state first. :)
[Galaxy S II Q&A, Help & Troubleshooting] shaharudeen:
i had this reboot issue initially when i bought it.. (happened a few times while in my pant pocket. never happened when i was using it on hand)...since i inserted a piece of paper in between the battery and the housing to improve the battery contact, it never happened.....

if u could give me a step by step to do logcat, i could find out the cause of reboot, if it ever happened again. so far, zero reboot past 3 days since the piece of paper in.

thanks
[Galaxy S II Q&A, Help & Troubleshooting] tommygun100:
I just took my battery out and put it back in, no more reboots fore me.....
[Galaxy S II Q&A, Help & Troubleshooting] Mr_Q:
It seems my earlier statement regarding bad ram, is not directly true and has to do with something different.

How I captured the logcat:

ConnectBot => Local => su then as root:

# busybox nohup logcat -f /sdcard/logcat.txt &

Then I closed the session. This starts a process logcat in the background, that will not be killed after the shell/session is gone (not sure if it is really required).

This did fill the file quickly: approx 1MB per hour, but it of course is depended on your usage, no of applications installed, etc.

The bad thing here is, there is no date/time in the log, so it's a bit hard searching for it. As the previous crash was not a real reboot (only a fast, 're-init'), I will try to investigate further until I get one of those real crashes and come back to you guys.
[Galaxy S II Q&A, Help & Troubleshooting] shaharudeen:
no more reboots

no more reboots since i put a piece of paper in between battery and phone housing to increase the battery contact. day 5 of paper in, no reboots...
[Galaxy S II Q&A, Help & Troubleshooting] TAEL:
I had two reboots today. It was fine for about 15 hours. When it reboots, screen turns on first then device reboots and galaxy s ii logo shows. Really weird.
[Galaxy S II Q&A, Help & Troubleshooting] Micksta:
I kept having soft-reboots whilst listening to music in my car. Since I changed from the Samsung stock music player there have been no reboots....