yashsingh1/xdaforums huggingface dataset:
[Xperia Z2 General] placebo1978:
Mine was at 69c, when it shut down. I also had a complete freeze. Phone was unusable, strange. So, my guess is, this won't be fixable with a SW Update. It is clearly a heating problem. The heat needs to go somewhere and plastic or glass won't help. ;) I will wait until June, if by then no SW Update surfaces, then it's going back to the store.

Greets

Placebo
[Xperia Z2 General] corallus:
It seems strange because 70c is not that hot in cpu standards, but then again our units have zero ventilation and 70c could cause problems,

I think for 4k video the cores are all going at full pelt and if that's the case Sony might be able to sort this with some kind of cpu throttle when recording. They just have to test how much cpu speed/cores is/are actually needed for the cam.
[Xperia Z2 General] corallus:
Has anyone tested 4k with stamina mode performance restriction on?
[Xperia Z2 General] Pesetio:
I just tried it, I got 14:24 with it on.

The first time I got 14:45 with it off, so I don't think it makes much of a difference at all.
[Xperia Z2 General] KrisPerry:
Just purchased from 3 store in UK. Overheated after approx 10 mins of 4k. Tried again instantly and it happened after just 2.10. Took it back to 3 store and they refused to return it. They were able to replicate the same fault on their demo unit so claimed it is a feature.

What are my rights?
[Xperia Z2 General] Sh4dovv:
No phone on the market can record in 4k reliably for over 10mins so it is not a 'fault'. It just seems a limitation on current technology.

If you want long 4k recording, come back in a couple of years:eek:
[Xperia Z2 General] KrisPerry:
ok so what about the gap issue. Surely it is a fault
[Xperia Z2 General] shuttlexp:
how come you can shoot 4k that long :eek: I'm lucky if i passed 2 minutes on 4k recording...
[Xperia Z2 General] Pesetio:
Too many variables to determine exactly why I can shoot for that long. I could be that it is Autumn here in Australia so it's not that hot, it's about 15 - 20 degree Celsius. So that could be why I can record for a long time though I can't confirm that is the reason.
[Xperia Z2 General] KrisPerry:
Ok so i was happy to accept that the phone can't do 4k for extended periods. Just had a play about with the other camera features. It overheated again after approximately 10 minutes. This is certainly a defect.

---------- Post added at 07:02 PM ---------- Previous post was at 07:01 PM ----------

I have written a letter to three as the store have refused to refund me. Unacceptable
[Xperia Z2 General] deepgrass:
There is 14 days return policy if you brought it online, and 7 days if brought in store.

http://www.three.co.uk/_standalone/Link_Document?content_aid=1220457053001
[Xperia Z2 General] KrisPerry:
Yes but they are claiming it isn't a fault as their demo model has the same issue and refused to refund
[Xperia Z2 General] shuttlexp:
I got my Z2 few days back. Upon turning the unit ON for at least 5 minutes,

I immediately noticed the heat from the back near the cam.

I tested the Cam, it can barely record a minute of 4K video (15seconds).

Can barely shoot 2 minutes of FHD video (1:34mins). And can barely shoot 3 photos

using superior auto, all because of overheating and the Cam will turn itself off. (very Hot)

Is this normal according to Sony?
[Xperia Z2 General] zanndoth:
Taking only 2 photos and cam shuts down is not normal. You don't even need to mention 4K or FHD recording.

Btw, are you on.55 firmware?
[Xperia Z2 General] SexyIceCream:
mine started heating up the first time i turned it on at the store. lol..can barely shoot 2 mins of 4k. have not tried 1080p yet
[Xperia Z2 General] amitoj96:
Is the overheating present even on 1080p or Superior Auto Mode? If yes then what's the use of buying a phone with so called best camera?

Can some devloper find a fix to it like optimum underclocking while using camera, increasing the shut down temperature value...companies set these too low to avoid any damages,some phones throttle even at 60°C!!

Can someone design a new kernel which allows higher camera temparature to a safe limit,say in increase of 5-10°C shut down temperature?

sent from my Galaxy Grand running CM11 4.4.2
[Xperia Z2 General] Carphedon:
This is a heat scan done by tweakers.net when recording 4K video. The camera app crashes at around 45 °C which it reaches in 3-5 minutes. Ambient temperature was about 20 °C. I suppose that temperature throttle is kicking in at 45 °C which causes camera app to shut down/crash. Temperature throttle can be disabled / altered with custom kernel.
[Xperia Z2 General] KrisPerry:
Are you referring to battery or CPU temp. Mine also crashes when using the AR effects after a few minutes. CPU temp is around 65 though battery temp is about 40
[Xperia Z2 General] raducanmihai:
I think he's talking about battery temperature. Mine crashes (in 4K) between 4 and a little over 5 minutes at around 65C CPU temperature, depending on ambient temperature, case or not, starting CPU temperature, how the stars aligned, etc.
[Xperia Z2 General] corallus:
That pic also explains why some glass is cracking wherever does, top half of phone is hot and the glass is slightly expanding while the bottom isn't.
[Xperia Z2 General] KrisPerry:
Does yours crash when using other camera features eg ar effects
[Xperia Z2 General] amitoj96:
45° is surface temperature of back cover just above cpu are. Most phones throttle at 65°C, so app crashing is common at that temperature.

I think the solution can be found if someone discovers exactly where the cpu should underclock during throttling.. by default underclock frequencies on throttling are very low..so the step 1 throttling should be altered in such a way that CPU and GPU(whatever is real culprit) run fast enough to support 4k and VR without causing excessive heat.Heating in semiconductor chips is non linear, so if u drop clockspeed by say 20% you will get say 40% less heat..balance needs to be found by devs!!

And they can alter safe limit for camera warning to say 70-75° just like most kernels do for regular overclocking.

Is changing mode to Run Hotter helping you in custom kernals?Tried it?:confused:

sent from my Galaxy Grand running CM11 4.4.2
[Xperia Z2 General] tridious:
I have definitely experienced higher temps when playing games on the phone without crashing it at all ,it could very well be just a simple firmware update. But after speaking to my local Sony helpline, the staff told me that .69 is supposed to fix this issue, yet it does not for my z2. I think Sony really have to come out and give a proper response on this rather than their pathetic "shoot in short bursts" statement. Its pretty obvious that many suffer from the error even when only using the camera mode, yet they're trying to deny any such fault and categorise it as solely a 4k recording issue. On that point, restricted 4k recording duration and out of sync audio, this really make me wonder how much effort was put into testing the device before approving for production/sales.
[Xperia Z2 General] amitoj96:
Sony is suffering from side effect of 6 months update cycle of flagship phones. Still its better than Samsung which couldn't add much useful stuff to S5 even after a 1 year update cycle.

Anyways you can try DooMKernel for Z2 as they have added proper thermal controls and claim to have FIXED camera shutdown issue to major extent.

Sony must move to metal HTC way as metal is better conductor of heat and will allow easier dissipation than glass or plastic.

I saw a video comparing temperatures of S5,Nexus 5 and One M8 performing same heavy tasks...M8 ran the coolest!!

BEST PHONE POSSIBLE=body of M8+Camera of Z2(when it runs cool):p
[Xperia Z2 General] raducanmihai:
I uninstalled AR effects so I don't know. I'll reinstall it and give it a try.

PS: I found the lowest temperature to be on Superior Auto.
[Xperia Z2 General] juanmaasecas:
You should try to disable stabilisation. Steadyshot needs a lot of computation and 4K is a very high resolution. This is probably the reason why the phone ends on getting too warm...

In my note 3 (also 4k capable) stabilisation isn't available when you shoot in 4k mode due to the high exigencies in computation you need. Since snapdragon 800 is quite similar to snapdragon 801, maybe the processor isn't powerful enough yet to handle 4K plus stabilisation for several minutes.

What do you know about galaxy s5? I know there's a 5min recording limit imposed by Samsung, but do you know if the stabilisation works? If so, probably it's because of the better AC version in s5 snap801 (z2 sports AB version, which needs probably higher voltage to reach same freqs, and consequently it gets hot earlier...)
[Xperia Z2 General] SexyIceCream:
afaik S5 has no stabil. in 4k mode. you might have something there...shall test it without the stabil when i have time! or perhaps someone else could do it in the meantime :p
[Xperia Z2 General] ahvipardik:
I did not make extensive test, but turning stabilization off seems to work for me. Also it appears to me that with stabilisation on and moving the phone, so the stabilisation has to make the work, makes phone warmer.
[Xperia Z2 General] placebo1978:
3702 5928462

For me it does not work any better. :(

Has someone tried these new kernels:

http://xdaforums.com/showthread.php?t=2735137

It would be very nice, if someone could shed some light on this. :)

Greets

Placebo
[Xperia Z2 General] chesterr:
If DoomKernel fixed the issue then simply Sony can fix this issue with an update? I hope it's fixed cause I used to get 8mins of video recording and now it's like 3-5mins :(
[Xperia Z2 General] jonmorris:
Only problem with the M8 is that it gets so hot when you have it out in the sun. This must actually lead to hearing up the internals rather than the other way around!
[Xperia Z2 General] Pesetio:
I've noticed that in the camera app when recording in 4K, all four CPU cores are locked at 1.0Ghz. It overrides whatever CPU setting you had before.
[Xperia Z2 General] KrisPerry:
Is there any issue using a third party camera app
[Xperia Z2 General] riginal:
any update on this? the issue got fixed with a firmware update or something?

I played with Z2 the other day and truly loved it but if the overheating issue persists I might as well just go for Nexus 5
[Xperia Z2 General] Envious_Data:
I found that with my Z2 the camera gets warm but i havnt had a overheat yet, but also i have root and modified kernel setting spesificly for keeping my device cooler

I managed to get about 15 mins of 4k recording max
[Xperia Z2 General] thehaman:
If you don't mind me asking, what exactly did you modify in the kernal settings?
[Xperia Z2 General] Envious_Data:
I attached some photos of my settings from faux

Also im quite sure that a 32gb UHS Class 10 MicroSd helps due to its extreme write speed,

:( i borrowed no im back on my poopy class 1, 2GB sd
[Xperia Z2 General] thehaman:
Thanks for the screens! Do you think my 32GB Class 10 SDHC will do alright or do I need one of them fancy UHS cards?
[Xperia Z2 General] Envious_Data:
It should do fairly fine class 10SDHC is around 40mbp/s which is enough for 4k i think

Im not too sure that my Z2 being a newer model may affect anything because my last one i couldent even get the camera app open without the warning showing imediatly
[Xperia Z2 General] thehaman:
Assuming I get a more recent model (I ordered mine yesterday from FGS trading off Amazon), I sure hope I don't have problems like your previous Z2.
[Xperia Z2 General] bikowalczyk:
Hi, could you sum up the following 11 pages for further users? Have you guys managed to cool out the device? Does the heat approach after using camera, or even while playing games? Don't the new Z2 models (how to check if it's new) have overheat issues?

Thanks for answers !
[Xperia Z2 General] Envious_Data:
it seems to just get fairly hot and stay there, usualy around 50deg(c),

4k recording seems to get it extremly hot, finger burning hot (didnt get a chance to check temp, turned off my phone soon after testing 4k)

Gaming depending what game usualy is fairly cool sitting at about 20-30 degrees (C), heavier games which the Z2 struggles with such as puddle and GTA SA maxxed out it seems to overheat usualy around 60degrees

when its been hot ive usualy left the device screen off as dunking the phone in a bowl of water while hot will crack it due to the rapid temprature change

it seems like the problematic batches are out, you should get a decent model, i had a early batch device due to the fact that they happened to send me someone elses return by accident (i doubt it though)
[Xperia Z2 General] bikowalczyk:
So there's a chance that If a buy Z2 at the end of June I wouldn't have over-heat issue? Is there a way I can check If the phone is new (not problematic batch) or not? IMEI or smth?

Thanks :fingers-crossed:
[Xperia Z2 General] jwchips:
No known affected bacthes or known good batches I think, just have to get lucky! I just received my Z2 on Friday, didn't use it until Saturday night (spent Friday on the beach). I knew about the 4k issue but it didn't bother me. However I was messing around with the AR camera mode and superior auto etc, just testing the camera and seeing what settings were there and I got the dreaded overheat and warning message. Literally under 10 minutes of usage, on day one of owning the phone, indoors at night. Going to try to stress test it later, if I can't take more than 3 photos in a 30min period the phone is going back.

If anyone has any info I'd really appreciate it. I have read all 11 pages (promise!). Someone suggested turning off the social apps but none of my apps sync photos? Can anyone give me a list of these 'social apps'? I know facebook, photos and gallery have all been set not to sync my photos but maybe I missed some bloat app or something.
[Xperia Z2 General] prats69:
Thanks for sharing. I was going to place an order today and was thinking that the overheating must be a software issue..I am scared of the thought of the phone overheating in under 10 mins of usage on day 1. Maybe I should go for the htc m8..i was sold over the extra 1gb ram z2 has.
[Xperia Z2 General] Envious_Data:
well here is how i decide, i do a honest questionnaire

example:

Z2 or M8

do i use the camera often aside messaging

-no = Z2 (lol mine doesn't heat much at all)

do i usually have +60 apps open at once

-yes = Z2 (3GB of ram)

do i like a tough phone

- yes = HTC (yet Z2 proves tougher weirdly)

blah blah blah you get the point, anyway the morale of the story is i went with the Z2 because it benefits me more than the M8 and i like it more, having much more customization and fun with Sony's theme engine and the Xperia Smart Camera, yes water resistance too, i suggest you do the same kinda questionnaire, in hopes it makes you this decision and many more in the future that your bound not to regret

take note that the Z2 initial batches have majour flaws so if you have gaps, heatings, lack of water resist, loose parts or anything abnormal, try to get a replacement
[Xperia Z2 General] prats69:
Thanks for that Envious data..I already did my research..the level of over heating was the last check on the list. I hardly play any graphic crazy . games..hardly shoot much photos/videos. I already have about 115 apps on my sgs2. So yes..I am a multi tasking freak...I want a phone which won't get much outdated for the next 2 years..in other words..like 1gb ram phones are available today as well (i bought sgs2 2.5 yrs back when it was the smartest phone). Hence the 3gb ram (the current upper limit). But if z2 can't handle the load of my apps and overheats like my sgs2...then thats a piece of crap worth $700 (43k INR to USD) for me.

Tell me your experience while multi tasking please..
[Xperia Z2 General] Envious_Data:
Multitasking i have 0 issues as expected from a linux based OS

I use to have issues with my old phone being that i couldent go n text someone then come back to my game i had left, at least now i can have about 9 heavy games open and still have about 2GB of ram free but like i mentioned in other places, Linux is healthy to use ram

Fun fact

Linux Based OSs usualy have about 15mb free however "free" ram shown is actualy freeable, sometimes there is a lack of freeable, especialy when below 1GB with android (linux is fine though)

Edit- i did forget to mention i have some odd issue where my Z2 very randomly gets warm duing any sort of use
[Xperia Z2 General] jwchips:
The problem (for me) is how quickly it overheats just taking photos. I want to be able to snap some images when I'm out at a party. If the camera app can only be used for 10 minutes in any mode (not just 4k but photos too) then the camera is useless to me, and was one of the deciding factors over the M8 (sonys 6 month release cycle also worries me). It's a real shame because I do really like the device.

I have 12 days to swap the phone, going to test the camera for a half hour tonight and make a decision. I've also had the touch screen go crazy! I'll post back with how it went later.
[Xperia Z2 General] jonmorris:
I was out on Saturday for a midsummer party and it was fairly warm, and sure enough - I started to get the camera errors. Even the original problem, which I thought was long gone, where you press the camera button to fire it up from standby only to get 'camera not available' appear. Great for those times when you want to take a photo quickly or something/someone. Press camera button, wait, get error, clear error, press power button to turn off, press again to turn on (may need to try a few times), unlock, fire up camera normal way, take photo.

Not the best point-and-shoot camera replacement then is it? And even if it's a rare problem, there's that thing called sods law that guarantees that if it is only going to happen once in a year - it will be that one time you really wanted to take a photo!
[Xperia Z2 General] Tachikoma_kun:
Not sure if someone else has mentioned it, but I found just the camera app being open is enough for the overheat warning. I was playing with the different camera modes, not even taking a photo and after 5-10 minutes it shut down.
[Xperia Z2 General] Envious_Data:
It usualy just gets warm if you leave it in 2mp, 8mp it gets hot
[Xperia Z2 General] Tachikoma_kun:
Good to know, thanks!

When messing around with the silly camera filters, you don't need 20MP shots so nice to know that you can shoot longer in lower resolution. I was worried as I occasionally do time lapse photos (which can take hours), and thought I wouldn't be able to do it on this phone, which would be a real let down.
[Xperia Z2 General] farfromovin:
I only saw the overheat message when I originally set up my phone and was downloading and updating a hundred apps or so while using the camera. Since then, I haven't used it more than a couple minutes at a time honestly. That's just my usage pattern I suppose. It does seem kinda crappy on Sony's part not to address the thermal management part a little better though. I mean, they brag of the world's best smartphone camera but it can't be used for more than 10 minutes unless your in arctic temperatures. Lame...
[Xperia Z2 General] kamalmawa:
I don't know about you guys but I managed to record a 19min 30sec 4K video before it ran out of storage space. This could be room temperature being 12C
[Xperia Z2 General] Envious_Data:
[MENTION=2986085]kamalmawa[/MENTION]

Same goes, so far about 21mins is my record but i do have a custom kernel with custom settings
[Xperia Z2 General] kamalmawa:
No modifications here just stock 17.1.1.A.0.438 rooted.
[Xperia Z2 General] ajai_dev:
When the environmental temperature is low the camera records 4K for more than 5Min but when the environmental temperature is more than say 35 degrees the sensor overheats before the 4Min.

The crazy part is when my phone was new 4K could be recorded for a longer time which has now decreased. Another friend who has bought the same phone after my recommendation can record 4K longer than me before it overheats. 4K is a worthless half baked feature very sad that I did not know about this before I bought this phone.
[Xperia Z2 General] kamalmawa:
Both Note 3 and Galaxy S5 has a 5min limitation for 4K video recording. It just Sony left it with a temperature limitation which is a smart move ;)
[Xperia Z2 General] johnfranz29:
Not just the 4K but even when you use some AR effects on the camera. i think i will wait for the Note 4. This is a bad thing when you are traveling and this happened, youll gonna miss the best part.
[Xperia Z2 General] feis:
Dont talk like every device is affected by this problem cause its far from reality, xda users here is such a small minority compared to global sales.
[Xperia Z2 General] duk3r:
Today I got a camera heat message after 13 minutes of 1080p video... This is getting annoying.
[Xperia Z2 General] cenasecoisas:
well I was going to buy a z2 but this problem... does it happen a lot taking pictures?

I read in other site that sony will not fix this... is that true?
[Xperia Z2 General] tel033:
We are a small minority however we do represent some numbers that can not be ignore and say it's just a coincidence that we all got the same problems and we are a good sample from around the globe
[Xperia Z2 General] duk3r:
This is the message I got today:

https://www.dropbox.com/s/sy0z72o2fi9vtss/2014-06-29 09.38.42.png
[Xperia Z2 General] feis:
I didnt say it was coincidence, its obvious some models have problems, but refrain from using words such as "we all" or "all of us", cause it doesnt represent reality and misguides other people.:) 100 users is far from all of us, and people tend to come and write in forums when they have problem, while the ones having no problems stays silent. So to make it short, yes there are overheating problems, and no, this problem is not present in every device as some users claimed here, far from it.
[Xperia Z2 General] Envious_Data:
[MENTION=1453730]feis[/MENTION] that is true that people stay silent but im trying to prove not all devices are faulty

It seems that newer batchs dont have such bad issues and i do have a newer batch device where ive had 21 mins of 4k recording but i ran out of space, my device was hot but not overheating
[Xperia Z2 General] tel033:
Still some of your aren't in a hot weather
[Xperia Z2 General] Envious_Data:
[MENTION=4578981]tel033[/MENTION]

True but i do have hot hands and it seems ive made any device overheat, Z2 gets close to it just like my xperia S and my Nokia N95
[Xperia Z2 General] cenasecoisas:
where did you buy it?
[Xperia Z2 General] Envious_Data:
I ordered from sonymobile.com almost a month ago now
[Xperia Z2 General] griffin_1:
So, from what i have read the 4k high temperature warning is still there, but if it gets 5min at least like the competition, its not halfway bad. As long as the high temperature doesn't crack the glass like in some cases =/ Im atributing that to earlier production models.

However, i have seen people complain about the temperature being to high and closing down in regular photos and videos. Even though im not that super into video and i don't spend more than 5 minutes with the camera app continuasly open ( rather open.close.open.close in intervals), i didn't expect the camera to crash and heat because of that and especially since my s3 just did a 15min full hd video today without overheating much and that phone can get hot sometimes.

What is worrying me now also is that i saw a post from a member in the earlier posts of this thread saying that got the same problem of excessive heating and craashing using the phone in navigation for over 1 hour. I use my phone as gps and so this is not good news for me since im considering the z2.

tl;dr: Anyone can give feedback if the phone does gives problems with heating while using navigation or just other apps/features for a period of time?

(yes, i know this thread is mostly about the camera, but since overheating in general seems to be discussed i thought i would post here and just avoid other thread about overheating. Hope that is fine)
[Xperia Z2 General] gm007:
Yes the heating issue exist for camera,all cpu demanding apps and games.