yashsingh1/xdaforums huggingface dataset:
[Xperia Z2 General] jonmorris:
I wonder if the auto feature of the camera, which does a pretty good job of detecting the scene type and adjusting accordingly is using a lot of power? I really do think it's terrible coding, as very little else on the phone (bar a GPU intensive game) gets my phone anywhere near as hot.

But, that said, I do wonder how much of a part to play the chipset has in general, given the LG G3 gets so hot it gives a warning, and the Lumia 930 I've got for two weeks is also the first Windows Phone to ever get really hot. I don't recall the Lumia 1520 getting that hot, so it may well be down to the internal layout of the components on not just the Sony.

Given the next phones will have even more powerful SoC's, I hope every manufacturer is going to be working hard on reducing these problems - and of course, making sure the apps aren't poorly written.
[Xperia Z2 General] Brownstone:
Apparently, one of their employees has recorded 4K "far beyond" 5 minutes. I'll have the same version he has then please:

[IMG="Wenbo"]https://dl.dropboxusercontent.com/u/403006/Wenbo.JPG[/IMG]

Liar! Then all the same copy and paste bullsheeit from the reply to my post.

BS...
[Xperia Z2 General] jonmorris:
I can't see how a replacement will fix anything. Does anyone know (for example a repairer) if there have actually been any changes internally, and as I assume not, you'll have the same camera app anyway. And Sony claims to have modified it so on the next update (4.4.4?) it should be less of an issue. Call me a cynic, but I doubt the problem will be solved entirely. Happy to be proved wrong though!
[Xperia Z2 General] One Twelve:
That employee does not mention the ambient temperature he recorded 4k with. Cooler temps, longer record times.

Sticking the z2 in a glass of water while recording video.

oh what's that in your drink...why its my....
[Xperia Z2 General] jonmorris:
Underclocking the phone seems to be a very good way to reduce the heat and increase the video recording time, so this would seem to me to be a good solution for Sony to investigate for a future update.

The Power Management menu already has an option to limit performance, but to be honest I can't really see what it does (is there any official explanation?). I know it turns off X Reality mode, but what else? I say this because it's enabled and the phone still gets hot/shuts down the camera. Perhaps it needs to be more aggressive, or give some user-selectable options?

Yes, you'd get some moan that the performance is hit. Some will use it as a way to bash Sony (other fanboys getting great pleasure in their otherwise sad little lives) but if it meant the phone could be used properly at all times, what's the problem? We all know that powerful devices will get hot, so most people would be happy to throttle performance as required to reduce issues.

Sony has of course got protection against excessive heat that could damage the phone, but I'd rather it took steps to reduce the heat before it had to do things like stop the camera - which to many is one of the main reasons for buying the phone.
[Xperia Z2 General] One Twelve:
None of the xperia Z series has the same extent of this problem in auto. Cannot recall anyone saying this happened with Z1.

Difference is z1 uses s800 whereas this is s801, supposedly more efficient.

930 uses a s800 so what kind of activity makes it hot ?

G3 uses a s801 and the soon to be released korean update will have a s805.

That is what they should be doing but making a properly working phone means it is boring, see apple & samsung. Not better than others but can do most tasks well.
[Xperia Z2 General] jonmorris:
I know the 930 is Snapdragon 800, but there's really not much difference that I can see between 800 and 801. In fact, many people told me that it would have been simply called 800 (but at a faster clock speed) had it not been for pressure from the manufacturers to allow them to launch devices this year with what people would see as a newer (thus better) CPU. Had 805 been ready, I am sure we'd have seen that used too - and perhaps that will be in the Z3?

Anyway, the Lumia 930 gets hot when using the camera too - but also on other things. I don't recall the 1520 (also using 800) getting hot, so perhaps even Nokia hasn't got things right this time.. or else the chipset simply gets too hot and needs far better designs for dissipating that heat?

I haven't yet experienced any warnings on the phone, so I don't think it's anywhere near as bad, but then again - I haven't been out taking photos and video in the hot sun either.
[Xperia Z2 General] tel033:
The statement I've read I sony forum said it will be solve in the next update, then .314 came and it didn't fix it, so you say it was referred to 4.4.4? And another camera app has the same effect?
[Xperia Z2 General] jonmorris:
I thought it would be in .314 but have been told it's the next big update. As 4.4.4 is out for other devices and is yet to come to the Z2, I assume this is why there's the delay.

One thing is for sure; It's not this update that has the fix!
[Xperia Z2 General] tel033:
Ok then I'll hope for the best
[Xperia Z2 General] jonmorris:
Me too.

You do have to wonder what's taking so long though (as in they've not actually created a satisfactory fix) as it's rather odd that the other models now have 4.4.4 and the flagship doesn't.

Perhaps given the improved weather in Europe (and I believe many of the coders will be working out of Lund, Sweden) someone noticed that the camera was still causing the phone to get too hot - and it was back to the drawing board!
[Xperia Z2 General] tel033:
Yes I guess so, though I don't understand how they pretend to fix it if the camera app is still the same version
[Xperia Z2 General] jonmorris:
I don't know how they've fixed the issue, or think they've fixed it. The camera app will surely be different on the next update? Or maybe they've gone for some other solution like throttling/underclocking.

Or they think they've fixed it and haven't, which we will know pretty quickly.

Suffice to say, if they don't fix it, I think I'll be getting rid of the Z2 when the Z3 is announced (but obviously only if that has fixed the issue).

I see elsewhere on this forum that there's now a thread about the G3 overheating. I wonder if we've reached a point where the chipsets are just too powerful to work in warm/humid conditions? Or if the manufacturers are experienced enough to deal with heat, as say the computer industry is?
[Xperia Z2 General] gm007:
Sony wont jump to higher update till they fix bugs in this version(4.4.2),thats what they usually do.

Heating problem is not related to which batch,i have14w23 and same as all of u heating problem.

I was an active user here when i had sony phones but when i bought lg g2 i forgot about xda for some time, its really a stable phone,but now since i went back to sony i have to visit xda again cause Sony need to change all their developers to make a stable phone.
[Xperia Z2 General] tel033:
Yes I know it's not batch related but still 4.4.4 should be out with the proper fix, g3 also heats apparently
[Xperia Z2 General] jonmorris:
It's rather worrying that we're still waiting. It makes me wonder how good the supposed fix is.

Yes, the G3 apparently heats up quite badly too. Given my Lumia 930 gets hot when taking photos, and I really dislike the Samsung GS5, I am beginning to think my M8 is the most reliable phone - except that has messed up and one entire column of pixels (yup, 1920 of them!) has died and you can't begin to believe how annoying that is!
[Xperia Z2 General] tel033:
I have the exact same problem, only thing is I actually don't like HTC nor Samsung, z3 would be a good choice but it's just an expensive z2
[Xperia Z2 General] .LEONARDO.:
Freeze overheat control service

I live in a very hot city, and it's almost impossible to use AR effects. 4k video at least works for a couple of minutes, but AR effects closes as soon as I try to use it due to camera overheating. I was wondering if the temperature service was disabled... If this issue would be solved. So I froze the overheating control service using titanium backup ( Overheat control - com.sonyericsson.psm.sysmonservice). And it worked! My camera stopped to force closing due to overheating. I think it's a software problem, the temperature level trigger to shut down the camera must be have settled too low,, if the phone was too hot, it should turn it off entirely, not just the camera. Well... My camera is working fine now. But I think this is not a safe solution. I guess if for some reason my Z2 get really hot, with overheating control disabled, it would not be powered off to prevent damage and my phone would be toasted. But I think there will be no trouble to freeze overheating control before using camera and activate it later... That's really annoying, but it's better than lose a moment cause your camera refuses to work due to supposed overheat.

*just to remember... In order to freeze overheat control service you need to be rooted

SONY Xperia Z2 D6543 4.4.2. 17.1.2.A.0.314 stock ROM rooted
[Xperia Z2 General] jonmorris:
I don't think it's a case of the temperature being set too low, but rather the camera app causing the phone to run hot even when doing nothing (i.e. just started up).

I could see a massive leap in temperature after activating the camera before taking a single shot. I guess the auto mode, constantly analysing the scene and (possibly) looking for facial recognition is just too much. Too much because of poorly written code, not because I'd imagine the CPU can't cope with it normally.
[Xperia Z2 General] tel033:
Still it must be fixed!
[Xperia Z2 General] jonmorris:
At the Sony IFA Q&A, it appears the Z3 will still overheat when recording 4K and the advice is to just stick to short clips, not long video.

So I suspect that other camera related overheating issues may remain on the new phone too.

Disappointing.
[Xperia Z2 General] .LEONARDO.:
My D6543 is w22. It's working fine now after freeze overheat control service. No more camera closing due to overheat. I could not even start AR effect before and I was not playing games or any hard usage before trying. 4k video is not an issue for me cause I won't use it. But before freezing overheat control, sometimes my camera refuses to take even simple photos....

Ambient temperature: 28°

Battery temp: 36°

CPU temp: 44°

Now let's start AR effects (overheat control service is disabled)

After 7 minutes recording

Battery: 47°

CPU: 72°

Temperatures seems to be stable, they were not increasing since minute 3....

Now 4k recording...

Before

Battery: 43°

CPU: 54°

After 4 minutes

*using internal storage

Battery: 53°

CPU: 84°

I accidentally stopped recording. But it seems it was still getting hotter.
[Xperia Z2 General] Croize:
How do you see exacly temp on battery & cpu ?? :)
[Xperia Z2 General] .LEONARDO.:
I use an app named widgetsoid that let's you create your own widgets to desktop or notification bar. To see battery temp, I use one strip containing 5 widgets at the notification bar, one of them for battery temperature. To see cpu temp I installed an Xposed module named "cpu temp on status bar".
[Xperia Z2 General] Croize:
aah okay thanks =) I found one named tempmonitor, gonna check it out, If not i check the one you use out :D
[Xperia Z2 General] sammis:
You can also use an app called Elixir widgets.
[Xperia Z2 General] tel033:
Isn't it dangerous to disable the overheating control?
[Xperia Z2 General] .LEONARDO.:
Yes... I'm afraid it prevents the phone to shut down when extremely hot to avoid damage. That's why I have battery temperature and cpu temperature constantly on status bar. The most "overheating" experience until now is 4k recording. Battery goes above 50° and cpu above 80°. But I noticed that it was still charging.

My Xperia Z when it gets too hot stops charging. I use to make it works as GPS navigator fixed on the windshield and charging all the time, but without notice that GPS makes it very hot, an it was directly under sunlight. During a very hot day, I saw it stopped charging. So I tried to make it charge again and noticed that battery temp was arround 60°. But it didn't shut down. I guess it melted the glue arround the camera and the back glass lifted a little, which made my phone not waterproof anymore. Now I direct the air conditioner cold wind up, to cold down the smartphone during the day to avoid it. This way battery temp uses to stay below 20° while ambient temperature outside is above 30°. My Xperia Z only shut down when I use an app called "fast discharging" that makes cpu works 100%, gps on, max brightness to discharge battery. And the collateral effect is overheating. But to make it hot enough to shut down it still needs to be on the bed and involved on a thick blanket. Very useful to make it dry faster when you got water inside camera:eek:

Yeah, that's how I noticed the back glass was lifted around camera... When I washed the old Xperia Z and tried to make a photo and camera was full of water droplets :screwy:

It survived, but the on-off button stopped working and sound volume got almost inaudible since then
[Xperia Z2 General] ipmanwck:
Phone arena tested camera of the Z3 at IFA on YouTube and guess what warning message popped up!!!
[Xperia Z2 General] NetSkill:
Oh damn Sony i hope they fix it asap...
[Xperia Z2 General] ipmanwck:
It's clear from the z2 sony can't be arsed to fix anything. Love this phone but will be moving to Note 4 or Edge Next.
[Xperia Z2 General] jonmorris:
That's the thing. They still haven't fixed it. They've concluded that there's almost nothing they can do, so they've modified things to give a lot more warnings. There are now three separate warnings/alerts that it's getting warm, has got too warm and will shut down, or is too warm to start up.

Of course, at least Sony is now giving an explanation rather than just quitting the camera or failing to take photos - but that's not exactly a solution.

Ultimately, after the problems with the Z2 which they'd have probably known about before it was even released, if they have done this on the Z3 and openly admitted it on the Q&A following the launch that they streamed to the world, it's NEVER going to be fixed.

It must be an issue with the phone design, or a problem with the SoC (which I guess is the same thing). Maybe Snapdragon 805 fixes things, being able to manage a camera and encoding video or processing stills without generating as much heat.

On the plus side, the overheating problem has all but gone now summer has ended almost as quickly as it begun, so unless I go away to a hot country between now and next year, I guess I'll be alright with my Z2 or if I upgrade to the Z3.

I doubt the Z3 will be any worse, let's put it like that.

I do wonder why a lot of the major tech sites seem to say very little, or nothing, about this issue.
[Xperia Z2 General] NetSkill:
I' ve been waiting so long and they come with nothing and acting like everything is allright... I am thinking about unlocking the bootloader...as i have seen somewhere here that undervolting drastically improves 4k video recording btw. i think that was the name of topic.. I am tired of wayting solution is already here but requires custom kernel...

I have feeling that there are even better developers than in sony
[Xperia Z2 General] [kEkA]:
It's design that's making it overheat that much, there is a reason why most of manufactures go with plastic :)

But it's no secret that they could have fixed it with undervolting, which is a way out for those who's phones are giving them headache when it comes to camera

But then again some ppl, like me were lucky enough to not have those problems/do not live in hot areas
[Xperia Z2 General] naukhaiz:
I live in dubai. Today I went to the mall and tried xperia z2 in all the stores, just to check the overheating problem. I hate to tell that every unit in every store gave the overheating warning when I used it in superior auto mode. I didn't even bother to try 4k video. It closes camera app after max 4-5 pictures. People living in warm counties like Dubai should never get this phone. Period
[Xperia Z2 General] ipmanwck:
Even in UK it gets too ?
[Xperia Z2 General] Uzzaji:
I'd like to add that if you changed from superior auto to manual mode, the device won't heat as much as it would in the auto mode.
[Xperia Z2 General] jonmorris:
Yes, the auto mode does seem to suck power just being on and not even taking photos. I guess the scene analysis is CPU hungry.
[Xperia Z2 General] Uzzaji:
Exactly, in the auto mode, the camera constantly tries to adapt to the current situation based on the lighting conditions, how far/close the lens is from the object also it tries to stay in focus..etc etc thats why the cpu heats up very fast.

A temporary solution would be to keep the camera on the manual mode till right before u take the shot and then just switch to the auto mode and take the pic. I know it's not that efficent but it works for me.

I still believe this can be fixed by a software patch or something. Maybe they could limit the cpu processing so that it does not heat like crazy or maybe they can downgrade the camera in a way that uses less cpu processing yet giving acceptable quality.

I'm sure there are tons of **** Sony can do to fix this issue, but they are busy with the Z3 right now which is identical to the Z2 and probably will have the same overheating issue.

Lets jusy hope one of the developers here comes out with a fix or something. :D
[Xperia Z2 General] AlanDS:
I live in Kuwait which is much more warmer than Dubai. Before 314 firmware update, the camera was shutting down within 1 min. Now it has improved a lot. Still not perfect. So as you said, this phone is not recommended to Middle East. Especially countries like Kuwait and KSA where its very hot during summer.
[Xperia Z2 General] [kEkA]:
Can you tell me what was the temperature at the time of your testing, please?

Regarda
[Xperia Z2 General] TheSupernova:
Oh bloody hell! No way!

So this happens on the Z3 too???

So are Sony going to fix or try and help this problem with a software update or not????

They can't just be sitting on their backsides! Someone must know something.

I would never get the Z3 now that i know overheating is still a problem for their newly announced flagship!

So disappointed with Sony.
[Xperia Z2 General] griffin_1:
Yep, i watched the video and noticed also. It keeps saying that it was heating up and if it kept in use and heating, the camera would shut down. It appeared a lot during the video also.

Here is the video in case someone wants to see:

https://www.youtube.com/watch?v=RDkyHdkfS9E

Honestly i thought Sony would have fixed this in hardware, i actually thought that was the main reason for the z3 since the hardware and design changes are minimal and it was a way for them to fix the hardware problem but they don't seem to be to worried about the problem because the z3 would have been a good way to redesign it to avoid the excessive heat (excessive to the point that it shuts down, not just "regular" heating up).

I wonder if the compact version also has these problems (never really looked it up).
[Xperia Z2 General] jonmorris:
They seemed quite happy to admit that the processor is under a lot of pressure and seem to be trying to say 'well of course it will get hot, what do you expect?'.

Now I know the LG G3 also gets really hot and that stops the camera starting too, and even forces the brightness down so that it's nearly impossible to see in the sun, but if there's such a big problem with the chipset, why isn't this being more widely reported. In fact, why isn't Qualcomm being asked to explain why its SoC gets too hot?

The Z4 must get this right. You can't expect that as phones get more powerful they simply won't work.
[Xperia Z2 General] griffin_1:
Also, something to have in mind with that z3 on the video is the fact that it is a floor model. So it is on charge pretty much all the time and used constantly and that does contribute to what we see in the video. Still, not a good sign.

Im also thinking that the 801 is to blame because it seems to get very hot, even the phones like the m8 and s5 have reports of heating up (the s5 can heat up doing stuff like browsing the web, but not hot to the touch or that it has to shut down, just a bit uncomfortable and also the hot weather doesnt help). So the processor has its fault, but other part is probably due to software and the way the phone was designed. Ironically, i remember reading when i was considering the z2 that it has or was supposed to have a liquid heat-pipe cooling system but it seems like it doesn't really work that well.
[Xperia Z2 General] jonmorris:
Unlike the M8, GS5, Lumia 930 and LG G3 that also get hot, only the Samsung and Z2/Z3 models can be dipped in cold water to cool them.

Maybe the Z3 should be nominated to do the Ice Bucket Challenge? Except it's not for charity but rather to be able to use the camera?
[Xperia Z2 General] tel033:
Can you disable the thermal control without root?
[Xperia Z2 General] ipmanwck:
Totally agree. Chipset is to be but qualcomm will never admit it. Jumping to note or Edge for next phone. SAMSUNG just get it right every phone. Even s5 with problematic Chipset still does well in camera tests. Z2 fails so bad?
[Xperia Z2 General] astoncheah:
http://xdaforums.com/android/apps-games/app-floating-windows-t2873669

guys, here is an app that helps monitor your battery temperature and cpu usage/load while using camera. so you will know in what status the camera shuts down. it wont solve this issue but gives extra information about this overheating bug.

i too am using z2 and facing this issue, that's why i created this app to monitor.
[Xperia Z2 General] Martinus:
does the shut down depend on manufacture date? I got mine from wk41 and it did not shut down while taking 4k video, after 16 minute the phone was full (no space left) so will try to test longer with a 64gb sd card. I also tempertured the phone and did not get any hotter after 6 min compared to minute 15.
[Xperia Z2 General] ipmanwck:
That's good. Please supply manufacturers code. Mine gets hot when intake lots pics.
[Xperia Z2 General] A|ex:
issue is not 4k and I really wish people would stop saying 4k all the time. the issue is 'camera use' video will use the camera all the time as well as taking pictures constantly.

its just poor design and there is nothing that can be done to solve this apart from giving the time camera to cool down.
[Xperia Z2 General] Martinus:
where is that? same card as the week?
[Xperia Z2 General] ipmanwck:
Agreed but high view finder refresh rate probably doesn't help. I found a blue ice pack helps.
[Xperia Z2 General] ArmedHitman:
I agree with the picture taking... I was taking pictures in sunlight and well it just turned off. It wasn't even constant photos just photos after family shuffled and sorted their poses out. Its kind of sad really that Sony didn't notice this because I would test my own product thoroughly. Also the fact that the phone can also get very very very hot sometimes in a call or when I use Viber for a extended period of time. The phone clearly needs some heat pipes or even a way to use the phone's metal housing to dissipate heat like a massive heat sink but yeah.
[Xperia Z2 General] ipmanwck:
Note 4 here I come ;) sony should put the processor at the bottom away from Camera!!
[Xperia Z2 General] Martinus:
you got an old edition? I mean early produced in 2014? I follow the topic and I read, the later is was build, the less problems. C my post some up in the topic.
[Xperia Z2 General] jonmorris:
I keep saying it, but I really don't think there's any real difference based on the manufacturing date. I wonder if anyone that repairs phones can confirm if there's any hardware design modification?

If Sony had found a fix, then they'd have almost certainly fixed it in the Z3 from day one. The fact these overheat suggests the basic design is flawed, and no fix has been found. Any lessening of the problem will be down to the software (newer camera software, other tweaks) or usage (cooler weather etc).