Galaxy Note 2 crashes during "screen-off" and heavy load. - Galaxy Note II Q&A, Help & Troubleshooting

Dear Experts,
Long time lurker here.
I'm currently in a dispute with the dealer on whether or not the Samsung Galaxy Note 2 i bought has a hardware or software issue. If it's a hardware issue it can be repaired under warranty. The device is completely stock with no modifications what so ever, as well as no root access. If you can help me provide a sufficient explanation of why it's a hardware related issue, perhaps I do not need to purchase a brand new phone, and hopefully it could help others with similar issues.
The issue arises when the phone is under heavy load and the screen is turned off. This normally seems to happen when the phone has multiple applications running background processes at the same time while updating applications (usually when the device has been left alone for a while). The device will then crash/freeze (i.e. screen will remain off and no response on any buttons). The only way to fix this is to hard reset the phone, by either long hold the power button, or pop out the battery. It will continue to drain power and heat up in this "frozen" state, as if it is still under load, until the battery dies.
The issue will persist after doing factory resets. However, the symptoms will not occur unless it has been used actively for a while (i.e. installing apps, enabling background updates etc.). This makes it harder to replicate the issue. However the symptoms can be seemingly replicated by using Stability Test 2.7 (a stress/burn-in test available on the Play Store), buy running the Classic Stability Test (CPU/RAM) and then turn the screen off for about 20-60sec, where it will crash. The issue will not occur when running heavy loads when the screen is turned on (i.e. when using it).
From my uninformed perspective, I suspect there could be an issue with a memory component of the device, as this only occurs when the screen is turned off. Which would probably mean that (I assume) the "snapshot" of the devices' current state, which the phone saves when turning off the screen, is somehow bugged because of heavy load, and thus crashes the device. Hopefully you could make a better sense of it than me.
Yours sincerely

Related

[Q] Performance enhanced after 5 min. shutdown.

Yesterdag I changed my screen protector on my TP-2. Because I didn't want my phone to go off during replacement, I switched it off and removed the battery.
When I restarted my phone, everything worked a lot faster than before. Internet performance was faster and I had GPS connection in a matter of seconds (indoors near a window). I had noticed that my phone had become slower in the past weeks. Soft resets had no effect.
I have my phone switched on 24/7, but now I get the impression that it's not a bad thing to switch it off for about 5 minutes every now and then.
Has anyone experienced the same behavour? (I use a Touch Pro 2, with a T-Mobiel ROM in the Netherlands).
Thanks for your replies.
Regards,
Rob.
nope, 'cause I know that you have "hidden" processes running in the background and by turning off the phone, you're just resetting everything so that there are no new applications running in the bg.
a program called 'arkswitch' allows you to close programs and free space on your tp2 without necessarily needing to reset it.
I did some soft resets, after I noticed my phone was getting slower. That had no effect. Only after a longer period of complete shutdown, the performance was back to normal. So other background apps couldn't have caused it.
But I'll see what I can find with 'arkswitch'
[Solved] I think
I use S2U2 to lock my phone. I had set the option 'full screen battery' to 'charging'. After I disabled this option and a soft reset, my GPS was up and running in a matter of seconds (even indoors). For some reason, this setting in S2U2 affects GPS detection and performance of my phone.
Perhaps someting to look into for the develloper.
So it looks like my problem is solved.

[Q] Random reboots

Since installing CM7.1, my phone has been rebooting randomly -- like 5-8 times a week.
It usually happens when using Google Navigation (but not always); and usually when in the car and plugged in to charger (but not always.)
I thought it was CM, so switched to Sense (Swagged Out Stock) -- but it's still happening -- usually when I most need the navigation!
I tried the GPSCLRX thing; didn't help.
Could it be the car charger? The heat from being on the dashboard? Any way to narrow down the cause?
Thanks!
Is it a full boot or a quick boot? Gingerbread does a quick boot, where it just shows the bootanimation for a few seconds and then reentered the OS, when the system runs out of memory.
Sent from my PC36100
It's a full restart -- goes back to the white HTC screen!
Does your phone get hot at all? How many apps do you have running in the background? Phone's usually restart if they run out of memory, get too hot, run out of battery (which I assume isn't the case for you), or have a software error. Checking the temp and the background processes on your phone can help eliminate a few causes and let us know which is the most likely culprit.
I've had this problem before when my phone gets hot. Also more frequently happening when charging and running navigation. This happened a lot when running CM. I changed to deck and it doesn't happen too often now. Not sure if it was coincidental.

[Q] lag issue

I own the Sprint Samsung Epic 4G
Twice I have had a problem were after charging over night the phone is hot near the camera area and the phone is extremely laggy. I just power down the device and turn it back on and it works fine again. This has only happened in the span of 6 weeks. My sister has the same phone and she has not encountered this problem. Any suggestions?
Not sure if a reset will fix the problem and I wouldn't even know how to do it.
*Side not the volume will randomly drop down really low and I have to constantly raise the volume. Not a big issue but again after paying money in the amount they wanted I should have to deal with that.*
Somewhere around there is where the SOC resides I think. Would have to look at the pictures of it torn apart again to make sure. You might uninstall your apps one at a time or a few at a time - reboot and see what it does.
You might also go into settings>about phone>battery usage and see if something is using a lot of CPU cycles. Watchdog, OS Monitor, and a couple other programs will list specific apps and processes so you can tell exactly what's doing it. CPU Spy is a great tool to use too - it will show you what speeds your processor spends the most time at.
As far as the volume, you may inadvertently be turning it down. If not, you might root your phone (if you haven't done it yet) and slap on the stock EK02 rom, kernel, and modem. If that doesn't solve the issue then go back to stock EG30 - unrooted of course (sticky thread in the development section for this phone) and return it to the store. It might be a hardware issue.

Location services cause reboot

I'm currently on stock MM with root and xposed but this issue started before I even upgrade to MM and I have cleared data and caches since the MM upgrade. Basically what happens is any time I open any app which actually uses location services (and have either GPS or network based location turned on) the phone reboots itself. When the issue started, it only seemed to happen when the battery level was also below about 40% but it slowly crept upward and now does it even with 100% battery and charging cable attached. Does anyone think there is a software explanation ? Are there any logs for location services or for the reboot I could look at which actually survive the reboot? I seem to remember last_kmsg being useful for random reboots but I don't seem to have that file on my phone (maybe something which has changed since I was really paying attention to Android dev stuff back in the ICS days). I'm hoping my issue isn't caused by a hardware defect but if that is the case I would like to know for sure.
6Eric said:
I'm currently on stock MM with root and xposed but this issue started before I even upgrade to MM and I have cleared data and caches since the MM upgrade. Basically what happens is any time I open any app which actually uses location services (and have either GPS or network based location turned on) the phone reboots itself. When the issue started, it only seemed to happen when the battery level was also below about 40% but it slowly crept upward and now does it even with 100% battery and charging cable attached. Does anyone think there is a software explanation ? Are there any logs for location services or for the reboot I could look at which actually survive the reboot? I seem to remember last_kmsg being useful for random reboots but I don't seem to have that file on my phone (maybe something which has changed since I was really paying attention to Android dev stuff back in the ICS days). I'm hoping my issue isn't caused by a hardware defect but if that is the case I would like to know for sure.
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Never heard about this, long shot but might wanna try a different battery and see. Other than that I'm stumped
I am having the same issue, I open Google maps and the device reboots changed the location to battery saving and it doesn’t reboot, I guess is a marshmallow issue
Forgot I posted this, turned out the battery had gone bad so couldn't supply enough power. Replaced the battery for like $8 and it was fixed.

Phone freezing twice or thrice a day ! Tried all reset options !

Hi All,
Anybody here with the same issue ?
Looks like a software issue/touch unresponsive issue because usually I find it coming back to normal once I press power button and unlock it again.
Sounds like RAM allocation issue, isn't ?
Thinking to sell it. Please suggest if you guys know a better way to deal with it !
Even if I go to SC, I cannot reproduce the issue at that particular time. They will just reset it and give me back, and that where I don't want to waste my time.
Does this looks fruitful to flash stock firmware again by the unbrick way ? I feel like that will be me last try.
You seem new here, so welcome on xda
One thing you should keep in mind is to be as precise as possible when presenting an issue, your description right now is not very clear, by the title it sounded like your phone actually froze, which could have been a ram or even a power management issue, but after reading your post it seems more likely that your display was wet, or that you were charging your phone, capacitive touchscreens are sensible to that.
Usually a frozen phone does not respond to the power button like yours did, and a ram issue seems very unlikely tbh
CriGiu said:
You seem new here, so welcome on xda
One thing you should keep in mind is to be as precise as possible when presenting an issue, your description right now is not very clear, by the title it sounded like your phone actually froze, which could have been a ram or even a power management issue, but after reading your post it seems more likely that your display was wet, or that you were charging your phone, capacitive touchscreens are sensible to that.
Usually a frozen phone does not respond to the power button like yours did, and a ram issue seems very unlikely tbh
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My style of using I believe is the same and I had no such issues in my Cool 1 ever in an year. Was a lot better in every way. Picked it up because I loved the looks, but have lost my trust on Huawei. They really need a lot of improvement.
i am having the same issues as the OP (Although i don't know what he means by "going to the SC")
the phone just goes through moments of extreme lag for about 10-30 seconds, sometimes longer, and it makes the phone COMPLETELY unusable during those times. it happens at least once every other day or so, sometimes several times a day, and sometimes it only lasts about 10 seconds, although on a few occasions, it has lasted several minutes, the phone will "attempt" to respond to inputs, but it gets nowhere quick, opening apps i did not click on, closing apps that weren't open, black-screening, half-screening (app on half the screen), etc.. sometimes i have to just power cycle..
i have the exact same feeling as the OP in that i want to sell the phone. (although i type much better, i'll assume english is a second language for him/her)
i like EMUI a lot.. although i think i want a galaxy s8/s9 now.
BND-L24 HONOR 7X B140 no root
Tirken said:
i am having the same issues as the OP (Although i don't know what he means by "going to the SC")
the phone just goes through moments of extreme lag for about 10-30 seconds, sometimes longer, and it makes the phone COMPLETELY unusable during those times. it happens at least once every other day or so, sometimes several times a day, and sometimes it only lasts about 10 seconds, although on a few occasions, it has lasted several minutes, the phone will "attempt" to respond to inputs, but it gets nowhere quick, opening apps i did not click on, closing apps that weren't open, black-screening, half-screening (app on half the screen), etc.. sometimes i have to just power cycle..
i have the exact same feeling as the OP in that i want to sell the phone. (although i type much better, i'll assume english is a second language for him/her)
i like EMUI a lot.. although i think i want a galaxy s8/s9 now.
BND-L24 HONOR 7X B140 no root
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Click to collapse
Since yours is the us variant, I'm assuming you've got 3 gb of ram instead of 4 gb, in which case a ram issue seems much more likely.
Not much of an issue actually, just that you probably had lots of apps open at the same time, leading to almost full ram (so the system starts closing background and even foreground apps if needed, leading to the strange behaviour you noticed).
Just remember to close apps you don't use and you'll be fine
CriGiu said:
Just remember to close apps you don't use and you'll be fine
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Click to collapse
It's 2018 and I think the OP and I know how smartphones work. I am coming from a phone with 2GB RAM and it has no such issues, no matter how many apps and/or games are open. Google explicitly states that closing background apps is unnecessary, and I should think EMUI offers an improvement over stock Android, not a detrimental experience. However, if you are correct and it is the RAM, it is not acceptable and needs to be fixed or I'm buying a new phone from a different company. In today's world, phones will open links to Chrome and from Chrome open reddit, xda app, pinterest, link to Facebook, share to Twitter, etc etc.. every time I click on a button I should not be having to back track to make sure I only have a certain amount of apps open. Nougat limits max open apps to 20 BTW, marshmallow it was 30.. But RAM management CPU management should be better. If it's of any interest, my reported "free" ram always stays at or above 1-1.5GB so I don't think its ram.. CPU or software problem, possibly.. But my Temps are good as well. Yes it's the 3GB version
Just a quick thought of something you could check (I also have the US 3GB version and was experiencing the same issue). Open up Settings > Battery, and other the "Other" section click "Consumption". See if there's any apps there that are keeping the phone awake and preventing it from sleeping. I would get constant lag after only a few hours of use, and it was intermittent just like you're experiencing. I was about to send the phone back, but checked this setting first. Turns out, the CNN app was running the CPU at nearly 100% for hours on end and preventing the phone from deep sleeping. Once I uninstalled that app, I haven't had issues since then. Could be something similar, just a thought. YMMV.
And by the way, it's NOT the ram. 3GB is plenty. You can see how much is being used on the app select screen, and I've never used more than 1.5 with a ton of apps in the background.
Let me help you there guys....i got the US variant too and has these freezing and lags all over the place, what i discover and did was:
1- Not all the apps works well with the phone hardware(they told me that somewhere) so try to test the apps you put on the phone.
2-Delete all the unnecessary apps from emui, that will give you less lag.
3-Check the battery consuming apps like the guy said and if you want turn on the close apps on screen lock.
Now after all of these my phone have been moving better but the problem isnt the ram, is the software so wait a little more so they can fix this cause is really a good value phone
It has to be the RAM management. Huawei must have optimized the software for 4GB, and then released a US 3GB version without changing anything, so it's screwed up even though phone is showing lots of free RAM.
Wao man thats the best explanation for this problem thanks man
It isn't and never was a RAM thing. Android's memory management essentially force closes apps (but shows them in recents) if it needs more memory. Note there is no work involved in that and you'd never know it until you switch apps and it has to reload, shows logo, etc. Amazing how non-solutions we're brought up multiple times and even thanked. Insert that's-not-how-any-of-this-works meme.
deV14nt said:
It isn't and never was a RAM thing. Android's memory management essentially force closes apps (but shows them in recents) if it needs more memory. Note there is no work involved in that and you'd never know it until you switch apps and it has to reload, shows logo, etc. Amazing how non-solutions we're brought up multiple times and even thanked. Insert that's-not-how-any-of-this-works meme.
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Well, yeah, ram issues nowadays should not be present, but I do speak on a basis, I have experienced bad performance and foreground apps getting killed on a nexus 5, which has 2 gb of ram and stock android. I have no idea what's emui's ram management policy, but on a scale, this would be the least likely cause for sure

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