yashsingh1/xdaforums huggingface dataset:
[Galaxy Note GT-N7000 Q&A, Help & Troubleshooting] eroracing:
Does anyone know if you can modify the camera app to pause the video recording during recording and then resume without stopping? My infuse 4g used to do this and i liked it a lot but this on case on my note. Im running ics RocketROM v7 if it matters. Thanks for any input.
[Galaxy Note GT-N7000 Q&A, Help & Troubleshooting] eroracing:
Well this sucks.I guess no one has any input!
[Acer Iconia A700 and A510] Beknatok:
UPDATE:

I wish I'd done some temperature benchmarking beforehand, but instead sourced the community to help out. Check out the various results on XDA... there are also results from two TF700 owners (in Europe) who were gracious enough to help me out.

http://xdaforums.com/showthread.php?p=28051518

First, it seems clear that my mod really didn't mitigate the heat issue enough... so don't bother.

Second, comparing the numbers between other A700's and the TF700... well, I'll let you draw your own conclusion on that one. :-(

---

Hi all,

As many of you have experienced, the A700 can get very hot under certain conditions. Mine got extremely hot to the touch after just an hour of gaming (Heavy Gunner, NFL Flick QB, and Cut the Rope), and crashed 2 or 3 times.

Well I decided to do something about it. Reading through the Service Guide (thank you paugustin!!!) & A700 teardown photos from another site, I came to some conclusions. First, from the looks of things, the back panel has some kind of metal plate lining, and 3 "pads" that closed the gap between the metal plate and several surfaces of the mainboard. My hope was that these pads were not simply foam pads but were actual thermal pads. I guessed that a bit of thermal paste might help the efficiency of those thermal pads... and if I got really ambitious, I could replace the thermal pads with larger ones (and paste those too).

Service Guide:

http://xdaforums.com/showthread.php?t=1716922

I followed the instructions in the Service Guide & opened up my A700 earlier tonight. I'm pleased to report that as long as you take your time, it's super easy to open up.

And lo and behold, my conclusions were accurate... the back plate is copper and the pads were thermal pads!

Back Plate:

https://www.dropbox.com/s/um556g6vtl7y99e/C360_2012-06-26-20-14-30.jpg

MainBoard:

https://www.dropbox.com/s/jka8gooiyqn9r2d/C360_2012-06-26-20-14-46.jpg

Closer Look @ the Thermal Pads:

https://www.dropbox.com/s/0j4e7wjfodwryk9/C360_2012-06-26-20-15-06.jpg

I took some CPU thermal paste I had lying around & dabbed some on:

https://www.dropbox.com/s/kvv99k3ghx73a00/C360_2012-06-26-20-17-24.jpg

Afterwards, I slapped everything back together, fired up NFL Flick QB and played for a half hour. I'm pleased to report that the A700 got warm but nowhere near as hot as it did in my prior gaming session. The "level of warmth" was what I'd consider mildly warm, comparable to my fiancee's iPad3, so definitely within reasonable tolerances.

I still intend to put the A700 through some more intense gaming tomorrow, but I wanted to write this post up and share it with everyone first. Hope folks find this useful and insightful!
[Acer Iconia A700 and A510] FloatingFatMan:
Nice discovery, but yikes! Thermal grease is meant to go on in a translucently thin layer or it ends up having the opposite effect! If you put that much between a CPU and it's cooler, you'd kill the CPU! :S
[Acer Iconia A700 and A510] doanb555:
superawesome!

Yet still i'd like to wait for more people to evaluate the hardwaremodding before i go in there myself.

Still, kudos to you. :good:
[Acer Iconia A700 and A510] Beknatok:
Except in this case, the thermal grease isn't going up directly against the CPU... it's going up against a thermal pad & large metal plate that is covering the entire mainboard.

Additionally, unlike a heatsink & CPU which are fitted together tightly, the back panel of the A700 & thermal pads do not contact anywhere near as tight to the mainboard plate. I fitted the two halves together, then pulled them apart again, to see how much the paste really spread out. This way I could better gauge how tight the contact was & remove any excess that got squished out. However, not much paste really did, telling me that the compression between the two isn't that great. That is why I'm toying with the idea of replacing the thermal pads entirely.
[Acer Iconia A700 and A510] Itchiee:
Hey, good stuff. Keep us in the loop on this....

Thicker thermal pads might be in order, or a better paste job under the plate on the CPU/GPU...

Bigger pads to spread the heat out more since the back looks to be one copper heat sink..

http://www.frozencpu.com/cat/l2/g8/c487/list/p1/Thermal-Thermal_Pads_Tape.html
[Acer Iconia A700 and A510] rushless:
Fantastic for the XDA community, but the average buyer will be like the cheesey pop group Power Station and will "Feel the heat".
[Acer Iconia A700 and A510] Beknatok:
Then be happy that you're amongst the enlightened! :D
[Acer Iconia A700 and A510] yeoldeusrename:
CAUTION!!!!!

OK maybe that's a bit strong, but as an engineer I have to question the logic employed.

First of all, the heat generated by the CPU, battery, etc. must exit the device. ALL OF IT!

Temperature of the back plate is determined by two factors alone: thermal resistance (e.g. insulation, heat pipes, air flow, fins, etc.) and the amount of heat transfer. I'm serious!

It appears that you have done nothing to affect the thermal resistance between the back plate and the air (e.g. adding cooling fins or increasing air flow). Therefore if your back plate temperature has decreased (and the air temp stayed the same), then we would conclude that heat transfer between the back plate and the air has DECREASED.

If hea
[Acer Iconia A700 and A510] yeoldeusrename:
If heat transfer from the plate to the air has decreased, then that means the heat transfer from the CPU etc. to the plate must have decreased as well!

My guess is that your thermal paste is producing a higher thermal resistance, as predicted by FFM! And it's deceptive because it's insulating the back plate from the CPU etc.

So where's the heat going? (I hear myself asking... myself.)

My guess is that it's dissipating through the tablet, getting distributed and absorbed and ultimately emitted more uniformly from the device. This would raise the internal temperature of the device, including the CPU! Hence the CAUTION!!!!!
[Acer Iconia A700 and A510] yeoldeusrename:
Your idea could have some benefit, though, and here's how i see it playing out:

If you decrease the thermal resistance between the CPU and the back plate, then the CPU would be closer to the temperature of the back plate (i.e. lower). But the back plate temperature won't really change because you still have the same total heat coming through and the same thermal resistance with the air.

As for spreading the temperature across the back plate more, I'm not sure you can do it more effectively than the copper plate that's already there. Not without insulating the most direct heat transfer path!
[Acer Iconia A700 and A510] Beknatok:
Right, I'm aware of this.

The exact problem I was attempting to mitigate, is the transfer of heat between the mainboard cover plate and the back panel copper plate. I was theorizing that the thermal pads being used were not fitted well, thus not functioning optimally as designed to begin with. As a result, not enough heat was being transfered to the back panel copper plate for proper dissipation.

So either heat is being transferred to the back copper plate more efficiently now and dissipating more effectively... or the opposite as you proposed.

However, if heat transfer has decreased, wouldn't heat buildup would still occur within the small area between the back panel & mainboard? While it wouldn't be absorbing the same amount of heat directly from the thermal pad, heat would still build up over time and that should still be noticable no matter what, right?
[Acer Iconia A700 and A510] Beknatok:
I'd also note that the BETTER solution would be to NOT combine thermal paste with the thermal pads, since as you point out, that can adversely affect thermal resistance.... but rather to replace the pads with better pads.

But I decided to be a guinea pig and try it out anyway.
[Acer Iconia A700 and A510] yeoldeusrename:
Sorry I got distracted before posting my conclusion:

So my conclusion (prior to your latest comments) is that you can effectively lower the temperature of the CPU but not of the back plate. (unless you're insulating it from the CPU, which will spread the heat around and raise the temp of the internals!!!!).

I will consider your latest comments and repost!
[Acer Iconia A700 and A510] s300pmu1:
The way I see it, the heat was not effectively transferred to the radiator. We have to remember that the case heat-up experienced by touch is not only the radiator, but the case itself heated by both the radiator and the air.

I'd assume that lack of crashes indicates smaller temperature of the CPU\GPU, as the heat is conducted more effectively by the paste to the radiator and dissipates evenly, instead of building up in one place and transferred to the case by air.
[Acer Iconia A700 and A510] Beknatok:
It's times like this, that highlights the one minor missing flaw of the A700... there's no bloody temperature sensors that we can poll!!!

*bashes head against desk*

So unfortunately, all findings are really subjective unless yeoldeusrename's conclusions are correct and mine are totally incorrect, and my A700 decides to fry itself.
[Acer Iconia A700 and A510] mearoth:
Well, i wouldn't be that sure. The A510 has them (at least separately for cpu and battery) and can be read by certain apps from the store. (E.g system tuner and battery monitor widget) so i would guess the A700 has them too.

Perhaps that helps
[Acer Iconia A700 and A510] Beknatok:
The two apps I tried, didn't show anything for temperature, but I just grabbed system tuner & it does register cpu temp! Yay! Will explore the app further to figure out how to record history for accurate metrics. Thanks for the hint.
[Acer Iconia A700 and A510] rushless:
Beginning to wonder if the heat and touch issues are why the 700 is priced the exact same as the 510. Nothing else apparently makes sense.
[Acer Iconia A700 and A510] Beknatok:
Anyone who is tracking this thread & wouldn't mind helping gather some additional data, please check out this thread:

CPU Temp Benchmarking - Request for Help

http://xdaforums.com/showthread.php?p=28009068

Thanks!!!
[Acer Iconia A700 and A510] Itchiee:
I think I'm going to look into creating a heat shield to place against the rear cover.

2 to 3 inches across and 4 down on the right side should do it.

This is a great tablet otherwise and don't want to give up on it just yet.

Besides the Asus sound system is inferior.
[Acer Iconia A700 and A510] FloatingFatMan:
The last thing you want is a heat shield!

You want something that can take the heat away from the CPU, and you're not likely to get better than is already there in the form of a copper sheet on the back. You just need something to do a better job of transferring the heat to the copper heatsink.
[Acer Iconia A700 and A510] Itchiee:
Yes, I am aware but I'll see whats what if and when I take it apart.

- Ordered 150 x 100 x 1.5mm - Thermal Pad to shape over the cpu/gpu area

I'll let you know how it goes....
[Acer Iconia A700 and A510] s300pmu1:
One person on the Russian forum had a problem with overheating. However, once he uninstalled Swype keyboard (first thing he'd installed on the pad after unpacking), the heating problem disappeared (he didn't test the unit with setcpu\heavy games, but he used to have overheating when web-browsing, not he claims there's none).

Not sure, though, that everybody here is using swype keyboard )
[Acer Iconia A700 and A510] Vonrottes:
Okay, So The copper back plate is MUCH larger (More surface area) than the heat spreaders on the GPU/CPU/whatever.

So the copper plate will take much more heat to reach a Thermal equilibrium with the heat sources.

I'm sure if I look it up I could give a super accurate answer of what is going on. but in stupid terms.

The copper will dissipate heat faster because it is larger.

Seeing as the mobile chips probably have a VERY LOW TDP a large cooling "fin" should be efficient enough to displace the heat produced.. given that the heat exchange is adequate

Just like with any cooler or radiator fins are implemented to increase the surface area..

These might be relevant?

http://en.wikipedia.org/wiki/Thermal_equilibrium

http://en.wikipedia.org/wiki/Heat_transfer

http://en.wikipedia.org/wiki/Thermal_design_power
[Acer Iconia A700 and A510] juzz86:
I've been unable to source a suitable, better-performing replacement thermal pad capable of bridging the (relatively) wide gap between SoC and heatsink. I'm thinking that a 'sandwich' solution, similar to what I've used on GPU VRMs before, may help.

Basically you use a thermal adhesive such as Arctic Alumina to attach (permanently) a portion of metal such as Aluminium - or even better, Copper - to the SoC. You can then use your TIM of choice to bridge the air gap between the new 'heatspreader' and the heatsink inside the rear of the tablet. This eliminates the need for a 'liquid bridge' of TIM, which is largely ineffective.

I've had success using this method on graphics card VRMs in the past, albeit they're always assisted by active cooling.

I'm still looking at/working with replacement pads before I do anything too permanent. I'll report back in if I have any breakthroughs :good:

EDIT: Fujipoly, more specifically their Sarcon range of products, looks like it may offer a viable solution, depending on the gap involved. Is anyone able to provide me with a hard measurement of the gap between SoC and copper heatspreader on the rear casing? Even just the thickness of the stock thermal pad would be a start.

Sarcon SPG-30A looks particularly interesting. This is a 'high conductivity', form-fitting conductive foam/elastomer, which should scale to fit the die/gap reasonably well. Conductivity isn't as high as I'd like to aim for, but we're talking a low-voltage SoC so should be okay. There's a higher performing (6W/mK) putty which may also be viable (cost permitting).

Now I just need to track some down :good:
[Acer Iconia A700 and A510] Itchiee:
I'm actually using Fuji-poly thermal pads from FrozenCPU which have seemed to have reduced the maximum temperature at least 5°C in preliminary monitoring although I need to test some more. At first I put a strip over the CPU area but this enlarged the heat surface area and made the back hotter. So I reopened it and where the areas rise (Where the original heat pads were) cut about stamp size squares to use instead which seem to have worked better. I'm using 1.5mm thickness and it works, although I had to move the one nearest the hdmi port back some so it would close more flush without being slightly raised when the unit was closed.

I'm still looking into programs that are running that are making the device hotter then it should be. I was playing around with cpu/task programs last night and after killing some things (Not listed in the usual places - Settings>Applications) and it appeared to be running cooler, but I dunno need more time. One important thing I've learned is make sure you remove the Micro SD card before operating... In my idiocy I lost a 32gb card when I failed to remove it, then it bent and snapped. And make sure to use rubber or lite plastic to remove the trim on the tablet, I roughed mine up pretty good. Total noob action......

Let us know what you find or if you wanna brainstorm on some things...
[Acer Iconia A700 and A510] Moscow Desire:
My feelings, are that it is going to involve PWR management, and kernel/driver adjustments. There's no denying that. Just move your finger across the display, and you start seeing temperature increases. With NO INPUT. Just the action causes the temp to rise,

You guys are just putting a band-aid on what the core issue is. Kudos for trying the physical aspect of things though ;)

A good thesis, but not the solution.

MD
[Acer Iconia A700 and A510] Itchiee:
Yes, that is a possibility. Also perhaps the CPU/GPU are over-volted could be an issue as well.

I do notice the cpu likes to ramp up and down on its own at times.

And my band aid lowered the temp by at least 5°C!!!!! :)
[Acer Iconia A700 and A510] Moscow Desire:
I can drill 9 holes in the back cover and 2 at the opposite end. Will probably decrease it by 10c. Just by thermal flow.

Doesn't fix the primary issue, which is, the CPU overheats till it re-boots.

It's a band-aid fix. The primary issue is not solved. Hell, the other Tegra-3 users don't complain.... And they OC to 1.8ghtz!!

Mine out of the box, was clocked to 1.4. Even though specs say 1.3. And please, don't anybody say things about "stepping". It doesn't apply to a stock device.

These 700/701 tabs had an issue, and Acer knew it. They were hoping us at XDA would find a solution. Typical behaviour.

MD
[Acer Iconia A700 and A510] Itchiee:
Yes, you are correct. Lets hope they can do something to fix it.

Mine has never rebooted no matter how hot it gets though for the record.

In Soviet Russia solution finds you!!!!

Sorry, had to, couldn't help it. :)
[Acer Iconia A700 and A510] californiarailroader:
I love Yakov Smirnoff :D

What a country hehehehehe LOL
[Acer Iconia A700 and A510] sadikhov77:
...reading through these posts makes me regret that i ordered this unit, before i even got it...

So is the heat bearable if i watch HD movies on it and do internet browsing? Because this is the primary reason for what i bought it. I am happy to stop playing games if i notice it is getting hot, but stopping to watch a movie in the middle of the episode is not an option....
[Acer Iconia A700 and A510] Buster99:
wachig movies andbrowsing is no problem. playing the bottom right corner gets warm. only managed to reboot it during games was with the stock racing game.. riptide and dead trigger etc. no reboot

cheers
[Acer Iconia A700 and A510] dingo dog:
Yes

So, this tab does have heat issues. I have applied your mod. Well. It does reboots as always but only on high resolution games as Horn. And I had heat related lcd blemishes in right bottom corner. Due to the mod there is enough heat drawn away from lcd to stop the lcd discoloration. BUT! Has anybody thought that the pads are on top of right corner, but only bottom gets hot?
[Acer Iconia A700 and A510] farazjk:
I have updated to official Jelly Bean 4.1.1 ROM and all issues regarding heating, touch responsiveness have been fixed. The device is working perfectly now. I think after this update A701 is the best tablet in this price range!
[Acer Iconia A700 and A510] Honusnap:
Hi all,

I've not read the all thread, just my point of view on the first post ...

If your device is less hot after applying the thermal grease ... means that it has been incorrectly applied, the grease is here for thermal conduction !! The hotter it gets, the better the thermal conduction is... :)
[Acer Iconia A700 and A510] bschrib:
Are you able to post your temps at idle and after a 6 minute gaming session?
[Acer Iconia A700 and A510] Moscow Desire:
Russkie Standart is much better...

Keep it in the freezer. We always say, if it doesn't freeze, it's good vodka!

As with temps, I can say JB has made some improvement with normal operations, However, the racing 2 included game does still indeed make the processor warm. But not to the point of being uncomfortable after 20 minutes. And if it doesn't reach it's max temp after that, then it probably won't.

So I would lay processor temp issue to rest.

MD
[Acer Iconia A700 and A510] dingo dog:
The thing is, these pads are not thermal pads, they are antistatic pads. I have added the right ammount. By the way. I have replaced these pads with real thermal pads from my broken ps3. Max cpu temp for me after stress test for five mins 78c, but the back is hot as hell. No random shutdowns.
[Acer Iconia A700 and A510] ExtremeRyno:
I'm not on JB yet, but I've never had an issue with heat, especially not enough to warrant opening the system up to add compound or pads. Played Horn for about two hours the other day and it didn't get overly hot, nor did I experience any reboot or force closing.
[Motorola Photon 4G] zikario507:
Moto electrify, doesnt play any 720p videos at the galley.. i had to install BS PLAYER.. But i would like have thumbnails of all videos..!!

Somebody Have some solution to play videos & show thumbnails with the Stock Video player on electrify 2.3.5 Locked BL!
[Motorola Photon 4G] na7q:
stock video player does up to 1080...
[Motorola Photon 4G] zikario507:
Stock video player doesnt play an h264 720p video downloaded from youtube
[Motorola Photon 4G] na7q:
must just be you. i know mine most certainly does. try using mx player if still can't get it going.
[Motorola Photon 4G] zikario507:
yes i use bs player for free is better than mx player.. but..

electrify phone doesnt have an amrv7rev3 codec in the stcok player???
[Motorola Photon 4G] peetr_:
For what I know, Android doesn't support that format (gingerbread). There is list of supported formats in Android development site. Dice player can play them with HW acceleration properly.
[Motorola Photon 4G] sk8rguy05:
My photon does 1080p

I'm not sure bout the electrify, but my phone the motorola photon plays 1080p videos in the stock video player. Which should work on ur phone too since it's practically the same phone. I ran if my old lg optimus v on virgin mobile can play 720p videos surely ur electrify can. But if not u can always download a movie player such as rock player or mx player. Or u can even try updating your gapps and that will upgrade all of them including your gallery.
[Motorola Photon 4G] zikario507:
i understand... ok.. amr7v3 is an hw accelerate... but stock player on electgrify doesnt have this hw acceleration video player..!!

i have to use another player with this HW acceleration to play smooth videos in 720p or 1080p
[Motorola Photon 4G] na7q:
i have the Electrify and in the stock player it DOES play up to 1080. so it must just be his phone.