Heat issues - AT&T Samsung Galaxy S II SGH-I777

Background: cm7 nightly (6 when this happened)
So last night before I went to bed, my phone was really hot and according to z-device test, my phone was 36°C. Then in the morning, it took nearly a minute for my screen to turn on so i could stop my alarm and it was even hotter. Z-device test now said it was 50°C. Idk if that's accurate but it definitely felt well over 100° Fahrenheit. I put the screen on my face and it was almost unbearably hot. The I turned it off until it cooled off and it seemed okay the rest of the day. What could the problem be?
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Sent from my Samsung Galaxy S II using XDA App

was the phone plugged into the charger? were you using it intensively on the charger right before you went to bed? do you have any profiles set (with setcpu or another program) that is forcing your phone to stay on high frequencies?
if it is fine now, then i wouldn't worry about it... chances are some app just caused you to use a lot of CPU, thereby making the phone hot. if it happens again, and you can't pinpoint a particular app as the culprit, i would try a battery pull, and if that doesn't work, maybe try a re-flash of CM7.

It was plugged in. And I had setcpu at 800-1200 because I heard that if the cup gets too low, the screen won't turn on... Also it was plugged into my Touchpad charger, and and since the Touchpad charger is like higher voltage or whatever, could that have affected it?
Btw, i uninstalled SetCPU since then.
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Sent from my Samsung Galaxy S II using XDA App

yes, that is what is causing your heat issue. you should not do extremely intensive tasks (like game playing) while your phone is on the charger - your phone is receiving a lot of juice, and you are exerting a lot of juice at the same time - ends up in a bad (and hot) combination.
especially with the setcpu charging profile that you have set up... you aren't allowing your phone to get below 800 mhz while it is on the charger, so of course it is going to be excessively hot when charging, for the reason mentioned above. if you got rid of that profile (don't have to get rid of setcpu completely), and let the phone dictate the frequency it charges at (most likely 200 mhz, or even deep sleep), then your heat issues will be solved.
glad i could help.

Ferrari353 said:
It was plugged in. And I had setcpu at 800-1200 because I heard that if the cup gets too low, the screen won't turn on... Also it was plugged into my Touchpad charger, and and since the Touchpad charger is like higher voltage or whatever, could that have affected it?
Btw, i uninstalled SetCPU since then.
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Sent from my Samsung Galaxy S II using XDA App
Click to expand...
Click to collapse
If you limit max frequency to less than 800 on a stock kernel - you'll encounter SoD issues.
With a custom kernel that includes the SoD fix (nearly any custom kernel does), you're fine. I wouldn't set a limit to 200 max and do NOT use "Powersave" for screen off.

Which custom kernel? Ive never flashed kernels before... Do kernels come with Roms? Because I have cm7 nightly...
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Sent from my Samsung Galaxy S II using XDA App

Related

[Q] Is battery temperature at 122°F bad?

I was playing Crusade of Destiny (full scale 3D single play RPG) while charging my phone and noticed the phone was feeling really really hot.
My phone is on Bionix 1.9.1 (OC/UV/VooDoo) and I used SetCPU to OC it to 1.2ghz.
Being me, I didn't want to melt my phone so I stopped playing and used SetCPU to check my battery temperate- low and behold, it was a little over 122°F. I went ahead and cooled the phone down asap by putting it in the freezer for a good minute or so and temperature went back down to 98°F.
My question is, at what limit should the temperature be at to insure myself that the phone will be okay?
DannyDoan said:
I was playing Crusade of Destiny (full scale 3D single play RPG) while charging my phone and noticed the phone was feeling really really hot.
My phone is on Bionix 1.9.1 (OC/UV/VooDoo) and I used SetCPU to OC it to 1.2ghz.
Being me, I didn't want to melt my phone so I stopped playing and used SetCPU to check my battery temperate- low and behold, it was a little over 122°F. I went ahead and cooled the phone down asap by putting it in the freezer for a good minute or so and temperature went back down to 98°F.
My question is, at what limit should the temperature be at to insure myself that the phone will be okay?
Click to expand...
Click to collapse
I set up a profile on SetCPU so if my phone reaches ~120F it give me an audible warning and clocks it down to 800 max. I know some ppl have had problems with profiles, however, they work just fine for me. I have heard that the Vibrant will start getting screwy around 125F, so best to keep it under that.
Ah, didn't know I could set an audible warning with SetCPU.
Wow I was closing to screwing up my phone then. Scary.
A lot of people report it heating up like that when charging and using the phone at the same time. If it ever got that high, I think its common sense to stop playing or maybe close what your doing (3d games or something heavy on the processor) I personally never got past 120 F...
I'd at the very least not OC. That game runs well with the stock kernel and no lagfix
Sent from my SGH-T959 using XDA App
DannyDoan said:
I went ahead and cooled the phone down asap by putting it in the freezer for a good minute or so and temperature went back down to 98°F.
Click to expand...
Click to collapse
I would strongly suggest NOT putting your phone in the freezer. ESPECIALLY when its running hot. Sudden temperature changes tend to crack electronics.
If you're worried, unplug it from the charger and turn it off. Maybe take the battery out (carefully).
- Nick
that's hot. my phone never gets past 110 when charging.
Sent from my SGH-T959 using XDA App
Other Battery problems...
I'm running 2.1 w/ one-click root and one click lag fix. I uninstalled ATK for the stock task manager set to strict, and I usually have wifi and gps. Ever since rooting and teh lag fix my battery has been hot battery is draining very quickly. Next thought is to just make the jump to 2.2. Any help or suggestions would be greatly appreciated.
When I flashed to Project Core kernal 1.2 and severe heat problems. Especially when overclocked passed 1 ghz you're gonna have heat issues. I don't really use my phone as it charges and i kill tasks that are not in use. Currently I'm using project core kernal v1 1ghz and its working great for me.

[Careful] Charging your CM7 TP ... it may overheat!

I left my TP on and booted into Android last night as it was charging. When I picked it up this morning it was really HOT and overheated, so I'm thinking either turn it off when charging or boot into WebOS before while charging. It seems like its not shutting off the charger when it reaches 100%.
Good to know. Do you know if the developers know about this as a known bug? Please check the rootzwiki thread here:
http://code.google.com/p/cmtouchpad/issues/list
open issues here:
http://code.google.com/p/cmtouchpad/issues/list
Left mine plugged in repeatedly w/out issue the last two nights w/out any heat issues. I had my screen off profile in SetCPU set to 1080 max CPU speed.
Redflea said:
Left mine plugged in repeatedly w/out issue the last two nights w/out any heat issues. I had my screen off profile in SetCPU set to 1080 max CPU speed.
Click to expand...
Click to collapse
I've got a case on mine so I might have not noticed if it was hot.
I've set the CPU to 1080 max aswell but can't overcome the sleep bug.
I'll take the case off tonight n test this.
Sent from my CM7 Atrix!
jackdonogy said:
I've got a case on mine so I might have not noticed if it was hot.
I've set the CPU to 1080 max aswell but can't overcome the sleep bug.
I'll take the case off tonight n test this.
Sent from my CM7 Atrix!
Click to expand...
Click to collapse
I was hoping upping the minimum CPU setting to 384mhz would have helped the sleep bug, but it hasn't. That and the wifi bug are the only 2 annoyances, but considering the alpha state, its stellar. Doesn't even really bother me
Sleep bug only effects me when Touchpad is asleep with charger plugged in. When unplugged and left alone It always turns on fine. I tested it to make sure too. Im also Overclocking to 1.5 ghz with set cpu and minimum 384 mhz using OnDemand.

[Q] charging paused because battery too hot

I am no my second GS2 and the issue persists.
Issue:
When charging overnight, the battery gets extremely hot. So much it warps the sim card. The first phone overheated until it died. Last night the second phone overheated until the warning message “charging paused due to temp” came up. I do use a CPU intensive app that uploads files to my server when plugged in. (so it doesn’t drain the battery). I have used all these apps on my old captivate with no issues with overheating.
I have tried Unnamed 2.2.1 and ICSreweD 1.6.1 roms, but the battery still overheats. Unless this might be a faulty batch from the store, what areas should I look into? At the end of the day, I would really like to continue to allow the app to run while charging. Especially since I have used it with less powerful phones prior. I have read others have this same issue with the GS2 but no solutions as of yet. Is there a different ATT phone that does not have this issue?
Silly question, but I know many who do this...
Do you place your phone under your pillow overnight while charging?
When charging and running a app that requires high cpu usage will overheat the battery. So close it at night while charging.
Damn warping the card. **** that's bad.
One time at football camp i put my shoulder pads in my ass
If you need to keep the app running while plugged in all night, what about using a plugged in profile in set CPU to throttle to 800 mhz Max or something...
Sent from my SGH-I777 using XDA App
dandrumheller said:
If you need to keep the app running while plugged in all night, what about using a plugged in profile in set CPU to throttle to 800 mhz Max or something...
Sent from my SGH-I777 using XDA App
Click to expand...
Click to collapse
Is there a specific app you recommend? Also, is there an app to limit the cpu useage of a service/app?
quy said:
Is there a specific app you recommend? Also, is there an app to limit the cpu useage of a service/app?
Click to expand...
Click to collapse
Set it with setcpu or tasker. It's likely running at 1200 mhz all night right now. (assuming you don't OC). Try throttling it down to 500 or 800 mhz, it should help. Not sure if there's anything that limits specific apps though.
Sent from my SGH-I777 using Tapatalk
Try the lulzactive CPU Governor.
Sets max CPU clock to 200mHz while phones asleep.
Also great for battery life
twiggums said:
Set it with setcpu or tasker.
Click to expand...
Click to collapse
If you absolutely have to leave your phone performing such intensive tasks all night, this is what I would try.
As twiggums said, it is probably running at 1200 all night and just melting itself. Unlike most computers, everything in our phones is passively cooled. Something else you might try is removing the battery cover (and any phone case) and placing a fan blowing directly on it. I know that is extreme, but so is what is happening to your phone.
Hope this helps.
I have also experienced this and it's really annoying. I couldn't love a human child as much as I love this phone but the overheating is not cool. I was using my phone to navigate while charging and once it got so hot that it locked up and another time it paused the charging due to thermal issues.
Sent from my SGH-I777 using XDA App
MonFrayr said:
Something else you might try is removing the battery cover and placing a fan blowing directly on it. I know that is extreme, but so is what is happening to your phone.
Hope this helps.
Click to expand...
Click to collapse
I had to do that sometimes when downloading some big files and tethering. Lol
Since my PC is caseless it wasn't that hard pointing a 120mm fan to it.
And yes it did work.
DJSLINKARD said:
I have also experienced this and it's really annoying. I couldn't love a human child as much as I love this phone but the overheating is not cool. I was using my phone to navigate while charging and once it got so hot that it locked up and another time it paused the charging due to thermal issues.
Sent from my SGH-I777 using XDA App
Click to expand...
Click to collapse
IIRC entropy mentioned some time ago that he throttles CPU to 800 mhz when using nav and charging...keeps it cooler and allows for slight charge rather than drain...
Sent from my SGH-I777 using XDA App
Yeah I'd suggest possibly throttling the CPU. I charge my phone while driving and stream Pandora and use navigation. I've got mine set to Max out at 500 while screen off and it works fine.
Ideally our phones should be able to handle sustained 1200 mhz. But then when you add a case and the heat generated while charging I guess it's too much for some. Guess it's the price we pay to have a beast of a CPU
Sent from my SGH-I777 using Tapatalk
thanks for the tips on throttling the cpu. i had thought about that and will probably do it but i still thinks its really lame that we have to do this. i dont even have a case on my phone. what are people who arent rooted and cant underclock their cpus supposed to do? oh well i guess
I have started to notice this on my phone. it happens when I'm in the car only though. Here's the situation.
It seems anytime I run Navigation my phone cranks up in heat to the point that I can't touch it. Is this a ROM/Kernel issue, or a problem in the phone itself?
stalked_r/t said:
I have started to notice this on my phone. it happens when I'm in the car only though. Here's the situation.
It seems anytime I run Navigation my phone cranks up in heat to the point that I can't touch it. Is this a ROM/Kernel issue, or a problem in the phone itself?
Click to expand...
Click to collapse
Well if your sig is correct and you're running at 1600 MHZ, I'd say that's probably why. Running at that speed for prolonged periods is likely to generate some heat.
twiggums said:
Well if your sig is correct and you're running at 1600 MHZ, I'd say that's probably why. Running at that speed for prolonged periods is likely to generate some heat.
Click to expand...
Click to collapse
I run Set CPU and my sig isn't correct. Well, the 1600 mhz isn't at least. I have it capped at 1000. It's just odd that I can multi task any number of applications without a problem. I use navigation and instantly, the only application I can use is that one. Running Pandora or the phone or the phone interrupts pandora or the phone interrupts navigation and I get this error and the screen gets untouchable.
stalked_r/t said:
I run Set CPU and my sig isn't correct. Well, the 1600 mhz isn't at least. I have it capped at 1000. It's just odd that I can multi task any number of applications without a problem. I use navigation and instantly, the only application I can use is that one. Running Pandora or the phone or the phone interrupts pandora or the phone interrupts navigation and I get this error and the screen gets untouchable.
Click to expand...
Click to collapse
Hmm possibly reflash your ROM. I can run nav and Pandora fine, and my phone limits my CPU to 500mhz while screen is off. Or at least try reinstallin maps/nav, sounds like its gobbling up way too much CPU for some reason.
twiggums said:
Hmm possibly reflash your ROM. I can run nav and Pandora fine, and my phone limits my CPU to 500mhz while screen is off. Or at least try reinstallin maps/nav, sounds like its gobbling up way too much CPU for some reason.
Click to expand...
Click to collapse
I told Pandora to not turn off the screen. I would think that Nav would do that natively or else it would negate the purpose of it. I wonder if maybe telling Pandora to keep the screen on and Nav keeping it on natively makes it think really hard and heat up.
stalked_r/t said:
I told Pandora to not turn off the screen. I would think that Nav would do that natively or else it would negate the purpose of it. I wonder if maybe telling Pandora to keep the screen on and Nav keeping it on natively makes it think really hard and heat up.
Click to expand...
Click to collapse
That's probably why
Sent from my SGH-I777 using Tapatalk 2 Beta-5

[Q] Phone overheating when using google maps for navigation?

I have a fascinate currently running HellyBean 4.03 and I have an anker 1800mah battery, I have the kernal running smartassv2 and sio with max cpu set to 1200. I used gmaps with navigation (gps plus cell data) last night for about 30 minutes and when I picked my phone up again it was hot. After turning everything off the phone cooled down again but I am curious what would have caused this? Rom? Kernal? Battery? Anyone else experiencing any overheating issues?
I would test the battery myself but unfortunately I cannot get to my original battery until this weekend.
Yeah, that always happens when it has to run at max or near-max clock frequency for a long period of time. As long as it isn't give-you-a-burn hot, nothing is wrong.
Posted from my Galaxy Tab 2 with CM10.1
MultipleMonomials said:
Yeah, that always happens when it has to run at max or near-max clock frequency for a long period of time. As long as it isn't give-you-a-burn hot, nothing is wrong.
Posted from my Galaxy Tab 2 with CM10.1
Click to expand...
Click to collapse
If this is normal then is there anything I could do to reduce the temperature? Maybe set max cpu back to 1000? I only ask because I am concerned if I tried to use navigation for a longer period of time the heat would end up causing some damage to the phone.
ulnevrwalkalone said:
If this is normal then is there anything I could do to reduce the temperature? Maybe set max cpu back to 1000? I only ask because I am concerned if I tried to use navigation for a longer period of time the heat would end up causing some damage to the phone.
Click to expand...
Click to collapse
No its fine these phones are known for getting a little warm I have mine set to 1.4ghz 24/7 and its fine . back in the days when you could over clock your phone to 1.7ghz LOL I had my over clocked to 1.6ghz and it got so hot it would turn on and off it never hurt it lol
Sent from my SCH-I500 using Tapatalk 2

[Q] Phone gets Hot

Is it normal, that the phone gets really hot, if i play some games !? i mean, sometimes it's so hot, that i can't touch the screen ...
Completely normal
Sent from my GT-I9100 using Tapatalk 2
Mine heats up like crazy if I just use Wi-Fi intensive applications (Skype etc) while charging!!
What about playing videos whilst charging? It heats up like a freshly baked pie!!
Sent from my GT-N7000 using XDA Premium 4 mobile app
Of course it gets hot if you do anything CPU intensive for any length of time (even more so on charge). The CPU has no cooling, no effective heatsink & is in a very enclosed space near other components that also get hot (including the battery). It's not like a PC CPU which has at least one fan & a heatsink (and vents), not to mention plenty of clearance (compared to a phone at least) between components in a desktop PC at least which allows heat to dissipate better.
Mdaazam said:
What about playing videos whilst charging? It heats up like a freshly baked pie!!
Sent from my GT-N7000 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
OC to like 1.4 GHz, OC GPU, Max screen brightness, charge and play graphic intensive games :good:
It's normal
I know this is an old thread, but I just started having this problem. I've had my Galaxy S2 since March 2013 but only in the past week as the phone been heating up and draining battery power to almost nothing in a matter of four or five hours. I used to be able to use the phone multiple times over the course of the day with no issue of heating or battery power, but ever since Friday 12/13 I've had this problem. It gets so hot I keep it off until I need it, and I'm used to keeping it turned on. Even keeping it in airplane mode doesn't keep it from heating up. I've had other Samsung Android phone users tell me of the same thing happening only in the past week, not before that. Any idea what it could be?

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