yashsingh1/xdaforums huggingface dataset:
[Xperia Z2 General] tridious:
Finally there is someone who wants to discuss the issue proper. I initially thought that it was a software issue related to the overheat control of the system. I have played graphic and processor intensive games on my z2 and it got really hot, to the point that it was hot to touch, not just warm. I did not realise until I ended the game (lasted about 10 minutes) and wanted to make a phone call. The area around the NFC logo at the back of the device was really baking hot. From what I know it is the area where all the hardwares other than battery is housed. I checked the battery temperature and it showed up to be at 49.3 degrees celsius. The temperature recorded when the camera auto shutdown was around the range of 44-45 degrees celsius. That led me to think that a policy was made to force stop the camera when the device temperature rise to undesirable levels.

I thought the issue could easily be dealt with a software update to increase the tolerance level. However, there is no word from Sony on it even after many users have reflected on this issue. This is when I begin to feel that it is either a hardware issue that is really hard to deal with or the policy is simply something that have to be put in place inorder not to damage other hardware components over prolong periods of high heat. From what I know from tech sites, z2 uses a liquid heat pipe cooling, something only a NEC smartphone has implemented before. Could it be a case of poor implementation of the technology?

And for the last time, please do note that (at least from my point of view), the main concern is the normal camera function is force closed when the device heats up, yes it does the same on 4k recording for me too. But like many stated, 4k does take a lot out of the hardwares, furthermore 4k displays are still considered as rather rare now. I would think most users have no qualms about limited 4k recording if there is no issue with the normal camera shooting, so please stop trying to ask people who voice their concerns here as unreasonable and exaggerating.
[Xperia Z2 General] El.Guaje:
You can prevent that problem by go to setting > app > all and disable all social and unuse app.
[Xperia Z2 General] magwin:
The Z2 is one of few smartphones with liquid pipe cooling. This must be very untested, and speculation went to this beeing the cause of delays.

It does not seem far fetched though. Overheating not only when 4K recording, but just using the camera. Certain spots on the phone being particullary hot etc. Thoughts?

EDIT: Apologies to the OP, saw that you had raised exactly the same question.
[Xperia Z2 General] RRSoftware:
Are you sure the Z2 uses heat pipes? Do you have a source link for me?
[Xperia Z2 General] magwin:
I cannot post links, but Digitimes first reported this, and almost all tech sites reported it. Toms hardware I think made a non copy pasta article.
[Xperia Z2 General] crótach:
I don't know, I've seen tons of heatpipe coolers in the past 20 years and when I look at the disassembled Z2 I don't see a heatpipe:

http://www.xperiablog.net/2014/03/30/xperia-z2-disassembly-guide/

On the other hand, the CPU is very close to the camera, and that's where most of the heat is (top section). I doubt that the camera can generate much, it's just optics and a light sensor. The main culprit for heat is qualcomm snapdragon 801. And I don't think glass is a very good heat conductor. :P
[Xperia Z2 General] KyleSforza:
http://www.phonearena.com/news/The-Xperia-Z2-has-liquid-heat-pipe-cooling-technology_id54935
[Xperia Z2 General] Mrplennium:
See, your comments scare me. If it's a hardware issue, then Sony will never fix it. Apple is the only company I know of that ever recalled a smartphone because of a defect consumers pointed out. I am afraid Sony, like many other companies, will simply address this issue in the Z3. Once the Z3 is launched, you will hear reviewers mention how much the heating issues while taking regular photos have been addressed since the Z2....etc Seriously wondering if I should cancel my order.
[Xperia Z2 General] SexyIceCream:
all this talking is swaying my decision to get the z2. maybe i'll just go for the s5...(even though i'm really sick of its design...)

=(
[Xperia Z2 General] simplytimo:
Maybe its the internal SD card that is the issue or storage management.

I find the RW rate slow and assuming that 4K videos will need more write, then it may heat up. (My phone heat up just for deleting sms! and phone basically hangs)

I not yet try taking many pics or video yet but if you have a good SD card with good i/o then you can try and change camera storage to the external SD card and try.

CPU management by the software for certain task could also be the issue.

Browsing the web so far has no issue on heating up - it does not require any writing to the storage.
[Xperia Z2 General] Mrplennium:
I was really considering the S5 as well. I just can't stand that physical home button. I am coming from a Samsung GS2; though, I went back to my Nexus 1 because the SG2 went for a swim. The SIM tray no longer reads my SIM cards. Now I want this phone and I am seeing all these issues about overheating. My SG2 and Nexus 1 never overheats when playing games or taking pics. I live in New York City so I take the subway to work. I usually play games to pass the time. I can't have a phone that will overheat and damage because it is not able to handle my ride to or from work. What scares me is that Sony has not acknowledged whether the issue is software related and fixable, or if it's hardware related. I don't want to have to settle for the M8 and its horrible camera. The only phone I see in the pipeline is the Oppo Find 7 and it's awkwardly placed power button. Though, I am sure that will have its own share of issues...
[Xperia Z2 General] tridious:
Well, I cant decide how you interpret my comments, I can only assure you that all I have shared is my experience with the phone over the last month. Whatever I have stated are my own speculation from little points and info I got. My honest point of view is that if you are someone who does not really use your smartphone's camera, or just for a snap or 2 at one go, this issue most probably have little effect on your daily usage of the device. But if you are like me, who uses the camera function regularly, then it does becomes annoying when the device you bought have this issue. My work requires me to take pictures of decent quality, hence a smartphone's camera is enough. From the poll results so far, it seems like there are infact quite a number of people with no such issues, so there is hope. I am still deciding whether to give my local Sony's support a last chance, haha.
[Xperia Z2 General] RRSoftware:
I tryed using the sd card. But after 5min it closed. I have a 45mb/s SD Card.

The video is 7mb/s.
[Xperia Z2 General] crótach:
Again, I do not see a heatpipe in the disassembly, but then again it may be much much smaller, in which case someone should still be able to point out which of the parts is the heatpipe.

Rumors aside, the Z2 only gets hot at the upper end where the camera and the processor are located. Any heat dissipating solution (heatpipe, graphite, whatever) should distribute this, but on the Z2 the bottom three quarters of the phone remain cool, and only the top heats up.

I don't see what a heatpipe could even bring without a heat sink. With HTC I could understand, the whole case is one giant heatsink, but Z2 is surrounded by glass.

Having said that, mine has never crashed, so the heat is obviously not an issue (yet). I don't shoot 4k video and I don't have a 4k screen. By the time I buy one I'm sure Z3 or Z4 will be out.
[Xperia Z2 General] magwin:
I am confident that this will not be an issue. Should it be, I will just lean on the laws and get a refund.

However, my wifes is exquisite and a real wow-piece (hey! I'm talking about her purple Z2!) and has no problem at all with overheating. I am expecting my white on Monday, and the stresstesting I will let it endure will be gruesome. I'll post back my findings.

I'm sure the S5 is really good, but I am having troubles with the SAMOLEDs presentation of colors. And the plastic. And the Touchwiz UI. But that's just my personal preference.
[Xperia Z2 General] SexyIceCream:
if only every country had the same laws(with regards to this) oh well :(
[Xperia Z2 General] BoneXDA:
Of course the question is if ppl. without issues ever put the camera under stress during a warm Sunny day, cause that's pretty much what I did right after picking the phone up, move over some flowers under sunlight, switch between modes and take numerous shots, and after about 5 minutes, 'camera overheated'. The person I picked it up from says he didn't experience this, probably due to lighter use, and everything was 100% fine for me too in shadows or after sunset, that includes any type of short video recording.

And that tells me that other than the Sun's extra heat and the app's high resources, screen brightness may play the key part here. There's a thing called screen throttling, a display getting dimmer via Android governor when the phone gets hot (happens to the Xperia T), so if the new Z2 screen at 100% makes the phone hotter than the camera app heat policy, it will logically force close. However the Z2 never was that hot when force close happened, Real Racing 3 on my Nexus 4 while charging gets much hotter, which tells me that the Z2 camera heat policy is too conservative.

Of course if the Z2's watertight body gets warm easily under stress, it is going to be a tightrope for Sony the set the policy right between performance and hardware protection, as 4k and heavy 20MP shooting with gorgeous 1080p live view will always require ISP and SoC to run high, and maximum screen brightness might kick temperatures too high... It's all speculation, yet if I can shoot 50 images in shadows with lower screen brightness without problems, then my theory seems quite well supported.

What do you guys think?
[Xperia Z2 General] KyleSforza:
This might be the reason?

Compared to PC and laptop heat-pipes, which range from 0.003 inches (0.8mm) to 0.08 inches (2mm) in diameter, smartphone pipes measure only 0.02 inches (0.6mm).

About the material : They are said to have better heat-dissipation effects than graphite carbon fiber sheets.
[Xperia Z2 General] Envious_Data:
314 firmware seems to have alot less heating issues

I havent tried recording at all but when i took some pictures my Z2 stayed fairly cool as compared to before
[Xperia Z2 General] AM Radio:
this makes me wonder about something slightly OT: is it just the Camera that causes overheating problems? or is it the heat in general that can cause problems with the phone? say, from using GPS for longs periods at a time, with the screen on? anyone have any experience with the phone getting hot / sluggish or shutting down from having GPS on?

because INGRESS.

(anyone play Ingress using the Z2?)
[Xperia Z2 General] jonmorris:
I was able to make a call and use Tapatalk (and Chrome) for a fair bit, without any real trouble, as well as checking bus/train times there and back. It's the camera that makes things go mental - you can get it over 60 degrees (CPU) in no time, giving you the problems.

The surface of the phone was hot because of the sun, but not so hot as to cause any problems. There might have been some throttling though, as I did notice it a bit sluggish at times.

Even when it's a bit cooler, Sony has in the last two revisions had this bright idea that to help cool the phone, it will quit the camera in a matter of seconds when not used. So you open the camera, wait for that 'moment' and - boom - it's back to the homescreen. That makes me know that Sony knew damn well it had a problem with something the camera app is doing for some time, and thought it could 'bodge' a fix.

Now it has perhaps found the problem, hence the admission of a problem and the promise it will be fixed in the next update - whenever that might be.

Clearly playing a game in 30 degree heat, with the sun beating on it so it's even hotter, may cause similar problems - but to me it is ONLY the camera that gives me any problems.
[Xperia Z2 General] cvgiu:
my second z2

two days ago

car, the navigator function

Z2 on his holder, near the car glass, under the sun

I tried to take a picture

the camera is not even playing

it was very very hot

more than 50 celsius

how beautiful !

---------- Post added at 10:39 PM ---------- Previous post was at 10:35 PM ----------

the third z2 has the same problem of overheating

all 3 of the week 19

all purchased online, price below ...
[Xperia Z2 General] ipmanwck:
I used GPS / Google navigation today and the device got very hot. Didn't freeze but I did notice slow down. Opened camera ok and took 5 snaps with no issues but phone was quite hot.
[Xperia Z2 General] decomposed:
I just tried 4K video.

I am on Android 4.4.2, 17.1.1.A.0.402 build.

The environment temperature in the room was 21 Celcius.

I was recording with system monitor small app turned on to provide you with the details.

Here is what I get:

I was recording for 5 minutes, the temperature was rising and reached 73 degree in C (and still was rising), battery temp reached over 46C.

I checked how is CPU usage as well, most of the time it was keeping at 883.2 MHz (sometimes, very seldom over 900MHz), CPU ALL (cores) usage was very high, from 77% to over 90%!

When it was about 5min 30seconds = it crashed due to High temperature :( :( :(

I've got a faulty 14W17 device!

Should I give it back ot you believe it can be fixed with the software?

Unfortunately there is no newer software in Poland yet...

I am so disappointed with this.

If Sony will not fix it, I will assume we all has been provided with faulty devices and I will not consider Z3 or any further Sony device neither!

---------- Post added at 09:30 PM ---------- Previous post was at 09:20 PM ----------

http://talk.sonymobile.com/t5/Xperia-Z2/Overheating-problems-with-Xperia-Z2/td-p/705013/page/5
[Xperia Z2 General] whpgab:
I had overheating issue as well. Usually when battery temperature reached about 40 celsius. Today I installed 314 firmware. Temperature in the room was 29 celsius. Started to record 4K video. I managed to record more than 9 minutes video then I turned it off, it was very hot. CPU temp was about 81 celsius. When the phone in idle cpu about 40 celsius. While I recorded the video cpu works at 960 Mhz no matter if I used Extended usage (stamina mode) or not.

Manufacture date: 14W15.
[Xperia Z2 General] tel033:
So would you say it's improved?
[Xperia Z2 General] whpgab:
I think, yes.
[Xperia Z2 General] jonmorris:
Is this the version that Sony said would have the fix, after confirming at long last that there was a problem with the camera?

I'm downloading the FTF now, so will try in the week if we have another hot sunny day and see if it improves things.

But, I've been reading that the Lumia 930 appears to have heat related problems too. I'm getting one from Nokia Connects on Tuesday, so will be keen to see if that also has similar issues.

So far that's the Z2, LG G3 and possibly the 930. Any other Snapdragon 80n powered devices having similar problems?
[Xperia Z2 General] tel033:
I don't think this is the one that fixes the overheating it wasn't in the changelog I guess the next one will, but please do tell your experience after flashing . 314... Does g3 also heats with camera??
[Xperia Z2 General] NetSkill:
I tryed recording at 4k with new.314 fw i recorded about 7 minutes then i stopped it my self (no overheating message)

I experienced significant frame drop after 4minutes of recording it looked like 20fps

The phone was really hot btw

I have 14w15 batch temp in the room was about 25-27 celsius
[Xperia Z2 General] jonmorris:
Yes. And just taking stills, although it was in a case so perhaps that didn't help (the Z2 was 'naked').

https://www.dropbox.com/sc/eg90s5dg6shacqb/AABF9DlRi6nI6pHhL2pF3HuMa
[Xperia Z2 General] bacardiandwatermelon:
Update fixed my z2. Have 14w18. At around 21 degrees my recording time jumped from 3.5 to 17.42 minutes. That was due to running out of space too. I feel for you guys, hopefully it all gets sorted.
[Xperia Z2 General] danhatcher:
It was announced in the last day or so that the G3 will ship with a Snapdragon 805 in South Korea. Hell if we get any results from there though.
[Xperia Z2 General] ipmanwck:
When the update come out? only had one update since I got my z2.
[Xperia Z2 General] tel033:
Was the camera also shutting down in normal use when the room temp was high?
[Xperia Z2 General] bacardiandwatermelon:
I have an Australian telstra z2, I changed the build prop so I got the Australian generic 314 update. Other than 4k it used to overheat in creative mode. In nz it is winter and freezing. 21 degrees is my aircon temp.
[Xperia Z2 General] cvgiu:
I, i'm in Italy.

I tried but I could not find manufactered afetr W 19.

where can you buy W 25?
[Xperia Z2 General] jonmorris:
Is there any evidence that Z2s made later don't suffer the problems? I say this given the fact that I now know the G3 has problems, and even the Lumia 930 has problems (and many people are saying it gets extra hot when using the camera).

And as time goes on, it seems the weeks mentioned as possibly being okay keep extending!
[Xperia Z2 General] bobet96:
I have .314 firmware. The longest recording I've had is 17 minutes, 58 seconds before the camera shut down. By then, the CPU was running at 67 degrees Celsius. Ambient temperature was probably about 25, inside an air-conditioned room. My Z2 is W23 and PVS is 14. This is my third Z2 after returning the first two for issues.
[Xperia Z2 General] tel033:
Was it while using 4k ir just normal?
[Xperia Z2 General] bobet96:
4k.

EDIT:

Wait, I don't remember. I'll test it again just to be sure.
[Xperia Z2 General] bobet96:
OK, maybe I spoke too soon. The 17:58 video is probably normal 1080 recording. I've only managed 6 minutes and 43 seconds in 4k mode before the camera shut down.
[Xperia Z2 General] kamalmawa:
If you can record anything over 5Min of 4K video you can be happy ;)
[Xperia Z2 General] tel033:
Can someone with a hot weather share his experience?
[Xperia Z2 General] danhatcher:
There has already been plenty of discussion on this matter.
[Xperia Z2 General] One Twelve:
Do the test again

1080p with and without steadyshot

4k with or without steadyshot
[Xperia Z2 General] cvgiu:
14W19

for the first time I tried 4k without steady shot.

It worked 15.17 mn before crashed (on microsd 64gb ultra)

But today i’m inside and the temperature does not exceed 23-24 celsius.

In the previous attempts with the 25 celsius, but steady shot was on, it crashed between 3 and 4 minutes

But, when the phone is used outdoors and the temperature is high, above 30 degrees, the phone is overheating and sometime also the camera stops after 3-4 photos or even not even start.
[Xperia Z2 General] One Twelve:
Sounds normal ie a phone that does not have problems. People that get this kind of performance are not complaining.

That underlined bit needs to be examined further as its not acceptable.

What if you turn of data as in switch off phone. Does camera still stop after 3-4 photos ?

I think what is required is if ambient temperatures are higher than normal that the phone should work slower so that it heats less. This means do not expect high performance at elevated ambient temperatures. When ambient temperature is lower then it can speed up to its max.
[Xperia Z2 General] jonmorris:
This appears to have been proven by those who have underclocked and found far fewer problems.
[Xperia Z2 General] Guest69:
I was taking pictures inside an empty wedding venue today, it was about 28c outside, I was using various modes but could only get 2or3 shots off each time before it shut down. Pretty disappointing. I had stamina mode on, cell on, wifi and bt off.
[Xperia Z2 General] bobet96:
9:58 before camera shut down. 4k, SteadyShot off. 30°C ambient temperature.

Sent from my Z2
[Xperia Z2 General] Brownstone:
I was working in Afghanistan recently, and could barely take an 8MP photo without it overheating and shutting down. 1080p and 4k a distant dream.

Very disappointed with this issue, as Sony have replied to me on G+ saying, only use 4k for short videos! Hahaha, how I laughed.

Mine has been returned to Clown Shoe Warehouse for 'repair', as I have also had issues with the proximity sensor, and the bloody SD and SIM plugs keep coming out in my pocket! I know it will come back the same, and when it does they can just keep it and give me an S5. I tried another manufacturer and it just didn't work out. Back to what I know and love, Samsung's platicky goodness!

Cheers,

BS...

---------- Post added at 03:57 PM ---------- Previous post was at 03:46 PM ----------

Here's my comment on their G+ post:

[IMG="G+ Post"]https://dl.dropboxusercontent.com/u/403006/Post.JPG[/IMG]

And here's Sony's unbelievable reply:

[IMG="G+ Reply"]https://dl.dropboxusercontent.com/u/403006/Reply.JPG[/IMG]

Aye, thanks for that Sony, very helpful.

BS...

---------- Post added at 03:59 PM ---------- Previous post was at 03:57 PM ----------

Lots more lovely comments here: https://www.youtube.com/watch?v=dbW-4Ui0z6U

Cheers,

BS...
[Xperia Z2 General] jonmorris:
Haha. For one thing, it can take a 128GB card - but what's the point if the idea is to only take really short videos?!

In any case, they know there's a problem (they've admitted it on their own forum) but seem to be quite keen to suggest/imply it's only 4K video. Sure, that makes the problem occur quicker in normal conditions, but on a hot day it can be enough to just take a few stills. It's good PR though. A lot of people will defend Sony by saying 'it's only 4K and what do you even need to record that for?'.

Now I have a small app system monitor running on top, you can see just how quickly it heats up just starting the camera. From around 39-40 degrees (CPU) to 60-61 within less than a minute! You don't even need to take photos, just have the thing open! Some really poorly optimised code in there for sure.
[Xperia Z2 General] Brownstone:
Their post on G+ was called "Future proof your memories", well I'd bloody love to if the camera would do as advertised!

Huge testing oversight as far as I'm concerned.

BS...
[Xperia Z2 General] ipmanwck:
Because sony have thus stupid 6 month release schedule when the Z3 comes out everyone who does not.own one of these will forget about the issues. Clever Sony will hide the issues by release of a new model.
[Xperia Z2 General] jonmorris:
The leaked photos suggest (and I emphasise suggest as there might be more to it) that the Z3 is more of a Z2 in a more curved case. In fact, on the face of it, bar the possible integrated wireless charging support, the Z3 really will be a very tiny update (much less so than the Z1 to Z2). I saw enough in the Z2 to upgrade (better screen and dual speakers) but what has the Z3 brought to the table that will entice me to change?

I do wonder if the internal design will have been modified to make it able to dissipate heat better? Let's hope Sony was actually aware of the problems way back when the design of the Z3 was started (considerably further back than when Sony finally acknowledged heat related problems at all).
[Xperia Z2 General] One Twelve:
Does steady shot on or off make a difference as to how fast the cpu temps climb ?

Am at a loss to explain why the temps rise to begin with. if its not doing anything as you say.