I came across some strange CPU behavior on my Exynos Note 4, and I wanted to see if there's a pattern between the SD805 and Exynos versions.
First, I used this app A1 cpu tool to get a real-time measure of cpu clocks. I installed it on both my Note 2 and Note 4.
Now, when I hover my s-pen over the screen (enough for the cursor to show) OR touch the screen, the CPU jumps up to 1300mhz (max power). On my Note 2, it will only get up to 800mhz (half of it's max CPU speed), which leads me to believe that the Note 4 is being too aggressive with CPU scaling, and it's resulting in poor screen on times.
I'd like to hear from both SD805 and Exynos users to see if they exhibit the same behavior. There should be no reason why Sammy is cranking the CPU up full tilt just to keep the s-pen cursor on the screen - or to handle touch events without anything major happening on the screen itself.
Hmm.. good observation and findings chap.. lets see what samsung has to say er... or any devs
Interesting, but if you have poor SoT, this is not the cause.
pedmond said:
Interesting, but if you have poor SoT, this is not the cause.
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Click to collapse
It certainly could be if my device use involves a lot of screen touch events (i.e. not watching movies). I type a lot on my phone, and if the CPU is running a full power for each key press, it can certainly cause more drain than it needs to.
EDIT : I will add that bench marking for battery life WITHOUT touching the screen gives me very respectable times. SEE SCREENSHOT
EP2008 said:
It certainly could be if my device use involves a lot of screen touch events (i.e. not watching movies). I type a lot on my phone, and if the CPU is running a full power for each key press, it can certainly cause more drain than it needs to.
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There have been more people complaining about poor SoT - the probability that all of them are using the stylus in such an intensive way seems small.
I can testify that I also use the stylus taking notes during meetings, sometimes as long as 2 hours. I never noticed a SoT reduction because of this.
However, it may be useful for you to post your battery usage stats. We could get a better understanding of the root cause. BTW, are you rooted?
pedmond said:
There have been more people complaining about poor SoT - the probability that all of them are using the stylus in such an intensive way seems small.
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Click to collapse
Interestingly, simply hovering the s-pen over the screen will ramp up the CPU too... I have a hard time believing that it wouldn't impact battery life.
pedmond said:
I can testify that I also use the stylus taking notes during meetings, sometimes as long as 2 hours. I never noticed a SoT reduction because of this.
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Click to collapse
Are you measuring the consumption, like in drain per hour or something like that? I notice drain between 12% - 20% per hour simply depending on very minor differences in usage (i.e web browsing vs. tweeting). I tend to use the stylus a lot.
pedmond said:
However, it may be useful for you to post your battery usage stats. We could get a better understanding of the root cause. BTW, are you rooted?
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Click to collapse
I am rooted and get good standby time and expected battery life (i.e with gaming). But regular SOT sucks and I barely pull 4h most days.
I'm hoping that Snapdragon users can confirm whether their device ramps up the CPU on touches too, or if it's just Exynos models (that could explain why people are experiencing such a variation in SOT between the two chips).
I wonder what happens if you still type a lot, but without using the stylus. That would measure if it's the touch events themselves or the stylus hovering.
When I said before that I don't see a SoT reduction while using the stylus it was just a subjective impression. I didn't actually measure it simply because I didn't feel it's worth measuring.
If you're right about this, I really hope Samsung comes out with a solution.
pedmond said:
I wonder what happens if you still type a lot, but without using the stylus. That would measure if it's the touch events themselves or the stylus hovering.
When I said before that I don't see a SoT reduction while using the stylus it was just a subjective impression. I didn't actually measure it simply because I didn't feel it's worth measuring.
If you're right about this, I really hope Samsung comes out with a solution.
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Click to collapse
Benchmarking with actual touch events would be very time consuming, but if I could disable CPU throttling for touch events, I could test with general use.
I read somewhere that this could be done, but I haven't seen any cpu control apps that do it on my stock Note 4 kernel. Perhaps it needs to be custom (or changed by Samsung)?
Sent from my SM-N910U
So, this is what I was talking about: http://forum.xda-developers.com/showthread.php?t=2532422
"input_boost_freq = Boost CPU speed to this frequency on touch screen events. Measured in MHz."
I would LOVE to be able to adjust that on the Note 4! I believe there's either a bug or an over-aggressive use of this function.
Related
This is not another thread about battery life obsession. It's more about a curiosity.
I have my Evo tuned so that it has great battery life on standby. When I use it for anything--SMS, data, local apps--the battery drains very fast.
I know that data, CPU, and display are the major consumers, but...
I have a Nexus One, with also a 1Ghz Snapdragon, and almost exactly the same loaded apps. Same screen resolution, both on 2.2. Both have 1500mAh battery. The only difference is the display technology and radio (GSM/EDGE/HSPA vs. CDMA/1xRTT/EVDO).
When used equally, the N1's battery does not drain nearly as fast as the Evo. How come? I know AMOLED is supposed be more power efficient, but by that much? I know CDMA can be less efficient, but again, by that much?
- - -
Duh! Edited from Hummingbird to Snapdragon (got confused-I just picked up an Epic which has Hummingbird). Thanks for correcting.
They both use Snapdragon, Hummingbird is Samsungs CPU codename, it's based on the same architecture but uses a smaller process.
What software are you running?
Same exact problem as OP...this baffles me.
Sent from my PC36100 using XDA App
Systemfraud said:
Same exact problem as OP...this baffles me.
Sent from my PC36100 using XDA App
Click to expand...
Click to collapse
Is it something new, or has this always been happening?
Was it after the new update or kernel WHATEVER, that you flashed?
If you’re running the stock kernel, do you think the fact that the screen is physically bigger may have something to do with the difference? I’ve always accounted the difference in the battery drain speed (between screen on and screen off) to the fact that most of us are running tweaked kernels that are overclocked when the screen on (with 5 point multi-touch, etc), and underclocked with the screen off.
The problem with battery life issues is that most of the time it can be just a perception and not scientific evidence at all.
Personally, I had an iPhone 3GS prior to getting an EVO and I would say the same exact thing happened with my iPhone. Especially when I was playing games. It doesn't seem to happen with my EVO.
Even seemingly silly things like the Battery Icon can help with the perception that battery life on the phone is bad. Since it only has 4 levels, it kind of tricks your mind into thinking your battery is draining really fast. Try flashing this.
Scientifically, The difference in battery life running the same exact apps under the same exact conditions would be almost negligible between an Evo and a Nexus one. You could even test them side by side and see for yourself.
Also, some facts:
- CDMA 3G is LESS power hungry than HSDPA when actually using it. Heck, EV-DO even uses less power than CDMA 2G(1xRTT)! Wi-Fi uses even less, so use it whenever you can.
- There's a huge misconception that AMOLED Screens use a lot less battery than regular LCDs, but in fact, that's only when the screen is showing LOTS of black color. During a web browser session with lots of white webpage viewing, AMOLED has no Power consumption advantage over LCD.
Signal is a HUGE contributor. I get about 12 hours out of my battery 3-4 out of 5 bars. I went to the sand dunes and had 5 bars and my phone lasted 28 hours.
zeuzinn said:
Also, some facts:
- CDMA 3G is LESS power hungry than HSDPA when actually using it. Heck, EV-DO even uses less power than CDMA 2G(1xRTT)! Wi-Fi uses even less, so use it whenever you can.
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Click to collapse
there are some variables here - my router at home sucks, so I actually get better signal (and battery) with 3g and not wifi unless I'm in the same room as the router. Like the guy above me said, signal plays a huge part in it.
btw, were you really one of the few people that had an n-gage?
fachadick said:
btw, were you really one of the few people that had an n-gage?
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hahaha yeah. Still have it shoved in my closet, actually. I LOVED it.
zeuzinn said:
hahaha yeah. Still have it shoved in my closet, actually. I LOVED it.
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Man that's a lot of phones...
Plancy said:
Is it something new, or has this always been happening?
Was it after the new update or kernel WHATEVER, that you flashed?
Click to expand...
Click to collapse
Seems like it's always been problem for me..
Sent from my PC36100 using XDA App
Plancy said:
What software are you running?
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Click to collapse
When I run Handcent, N1 uses about 20% less battery over ~400 messages. Browsing sees similar results. No exotic apps and I keep close eye of what is running/syncing in the background.
Plancy said:
Is it something new, or has this always been happening?
Was it after the new update or kernel WHATEVER, that you flashed?
Click to expand...
Click to collapse
I too, have seen this from day one, running all stock ROMs.
zeuzinn said:
The problem with battery life issues is that most of the time it can be just a perception and not scientific evidence at all.
Even seemingly silly things like the Battery Icon can help with the perception that battery life on the phone is bad. Since it only has 4 levels, it kind of tricks your mind into thinking your battery is draining really fast.
Scientifically, The difference in battery life running the same exact apps under the same exact conditions would be almost negligible between an Evo and a Nexus one. You could even test them side by side and see for yourself.
Also, some facts:
- CDMA 3G is LESS power hungry than HSDPA when actually using it. Heck, EV-DO even uses less power than CDMA 2G(1xRTT)! Wi-Fi uses even less, so use it whenever you can.
- There's a huge misconception that AMOLED Screens use a lot less battery than regular LCDs, but in fact, that's only when the screen is showing LOTS of black color. During a web browser session with lots of white webpage viewing, AMOLED has no Power consumption advantage over LCD.
Click to expand...
Click to collapse
On both phones, I have a % battery gauge. I use both phones in good coverage area and have observed them over weeks of use. I would use one phone for the day, do the exact same thing, use the other phone the next, and consistently see the N1 having 20-30% more battery at the end of the day. I'm thinking of loading "current widget" to see the drain rate between the two phones.
On the subject of radios: I have seen manufatures list longer battery life for EDGE vs. HSPA and the same for 1x over EVDO. Also I [think] usually see longer standby times for a comparable GSM/UTMS phone over CDMA (e.g., Touch Pro2 on GSM/UMTS vs. Touch Pro2 on CDMA).
When one says that EV is less power hungry than 1x, are we talking about a time-use comparison or efficiency? Example: 1Mb download, 1x takes, say, 1 minute, while EV takes 10 seconds. Yes, for that download, EV took less power. But if one were to have 1x & EV both running for one minute, which takes more power? I ask because I remember seeing EV transmitting at higher power than 1x.
Epic vs Evo battery differences
Something I noticed while having an Epic and Evo under one roof was that although they both last about the same length on a charge, the components using the juice vary greatly. Here’s is a breakdown of the most power hungry items arranged from most power usage to least:
Evo:
• Cell Standby (most power usage)
• Phone Idle
• WI-FI
• Android System
• Display
Epic:
• Display (most power usage)
• Cell standby
• Phone idle
• Android System
Initially I thought that the Epic’s AMOLED screen was WAY more power hungry than HTC’s LCD. But if that was the case I would expect the Evo to outlast the Epic on a charge which wasn't happening. Then it hit me. Samsung’s Hummingbird CPU/GPU is 45mn and is supposedly eating less power than the older 60mn Snapdragon processors. If true this could explain the reversal of the “Display” from being at the bottom to being at the top. I suspect the AMOLED does require more juice than HTC’s LCD but perhaps not as much more as I originally thought. What is likely going on is that the system components are less power hungry on the Epic but the screen is somewhat more power hungry. This could explain why Evo’s and their custom undervolted kernels see a big improvement in battery life, simply because the underlying cpu/gpu is using a larger percentage of the battery’s life.
The other noteworthy item, Wi-Fi was always in the middle of the list on the Evo but doesn’t even show up on the Epic even though Wi-Fi is always enabled. I have heard the Epic uses a newer low power Wi-Fi chip and if that’s the case it seems to have paid off.
My Conclusions:
1. If you want more battery life on the Epic, turn off auto brightness and set the brightness quite low. Set applications to “dark” theme’s when available because black pixels draw no power on the amoled screen.
2. If you want more battery life on the Evo, you’ll want to look into rooting & custom undervolting kernels (and you’re in the wrong forum…haha).
I welcome your comments and to know if you draw different conclusions. Thanks!
Well I've heard the samoled takes less power than the lcd but idk. Just putting some info down.
Sent from my SPH-D700 using XDA App
rocket321 said:
Epic vs Evo battery differences
My Conclusions:
1. If you want more battery life on the Epic, turn off auto brightness and set the brightness quite low. Set applications to “dark” theme’s when available because black pixels draw no power on the amoled screen.
2. If you want more battery life on the Evo, you’ll want to look into rooting & custom undervolting kernels (and you’re in the wrong forum…haha).
I welcome your comments and to know if you draw different conclusions. Thanks!
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Click to collapse
1. If you want more battery life on the EPIC, get a custom ROM (viperrom) running 2.2. Helped me get from 8-10h with low use to 16+h with moderate/heavy use.
Yeah stock epic battery is horrible.
However, on dk28 its much much better battery life
Anyone else notice that the screen always takes up about 90% of the power? Lol but that doesn't mean it won't last long
I just made a thread about how I watched two full length movies on the highest brightness and I'm at 13hrs right now still kickin lol
Sent from my SPH-D700 using XDA App
deano0714 said:
Well I've heard the samoled takes less power than the lcd but idk. Just putting some info down.
Sent from my SPH-D700 using XDA App
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I have said both of this things on other threads today, but they bear repeating here.
First of all, SAMOLED uses more power than LCD in most cases. It uses less power than regular AMOLED. If you go back and read Samsung's press releases, they say that fact. They don't claim better battery life than LCD, and you know they would be the first to say it if it were true.
narn17 said:
1. If you want more battery life on the EPIC, get a custom ROM (viperrom) running 2.2. Helped me get from 8-10h with low use to 16+h with moderate/heavy use.
Click to expand...
Click to collapse
The Galaxy S devices have software issues that cause some of them to use their antennas constantly. With this issue, the battery drains in 10 hours, at best. You should be getting at least 20 hours out of your battery with moderate use. If you are experiencing these issues, chances are it will happen on all ROMs (as it did with me). I know two other people who have Galaxy S devices and they both have this issue. Mine started getting 20 to 30 hours when I switch to DK28 (and my GPS broke, not to mention occasional FCs and a broken WiFi tether), so I am betting this will get fixed with the 2.2 update. The above quote further supports this theory.
BTW, the whole "recalibrating the battery" thing does not help and can be harmful to your battery. While I am dispelling myths, clearing a cache or resetting a partition more than once is a waste of time. If you ever hear someone say "clear system 3x", they are just being superstitious. Maybe they have accidentally hit "no" instead of "yes" when they cleared it in the past, and ever since then they decided to do it 3 times.
One more myth! Most benchmarking tools for Android are crap. Quadrant has been shown to give highly inaccurate and easily manipulated scores. I used to think Linpack was good, but I have heard of G2's getting like 33 MFlops, which is ridiculous and makes me think it is bad as well. Any benchmark that takes into account FPS is only accurate if you remove the FPS limiter on your phone. All phones that I know of are locked to a max of 55-60 FPS (Epic 4G is locked to 55.6). What that means, is if you put a 5ghz quad core CPU with a GTX 580 in your phone, you would still get 55.6 FPS with those benchmarks (such as Neocore).
BenchmarkPi seems to be pretty accurate for CPU. An3DBench seems to be OK for OpenGL and 3D benchmarks since they tend to tax the GPU so much that it doesnt ever hit its limiter.
Are there any comparisons of the two cpus available on the s4 when it comes to battery life? Thats the only reason for me to try to get an exynos version if its shows to be better in that respect.
Yeah, that's a good question I want to know the answer too, there are many people having testing devices but they are too hungry about testing the damn processor and gpu instead testing properly the battery life. -_-
demlasjr said:
Yeah, that's a good question I want to know the answer too, there are many people having testing devices but they are too hungry about testing the damn processor and gpu instead testing properly the battery life. -_-
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Lord knows battery Life is very important to me.
the guy that's testing whatever people tell him to test said that when his battery got down to 30% it lasted like 3 hours with max brightness and benchmarks running
frankyy714 said:
the guy that's testing whatever people tell him to test said that when his battery got down to 30% it lasted like 3 hours with max brightness and benchmarks running
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Click to collapse
With wich cpu? Also no comparison to the other version mentioned here.
I'm not convinced, even with S3 you can spend all the battery juice in 3 hours if you want. To do a proper test you need to leave the device doing the same job like an Snapdragon S4 during the same time.
Sent from my GT-I9300 using Tapatalk 2
Octa has a longer battery life than SD600.
That's why samsung used 8 cores technology.
And by the way the 5inch HD screen saves power too for both version
Sent from my GT-I9300 using xda app-developers app
HMJ-q8 said:
Octa has a longer battery life than SD600.
That's why samsung used 8 cores technology.
And by the way the 5inch HD screen saves power too for both version
Sent from my GT-I9300 using xda app-developers app
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Click to collapse
Thaty what one hears, yes.
However I would like some actual test reports - for instance how long does the phone last for web browsing, for video playback and on standby?
I would like to see actual numbers.
As for the screen:
It is said to use 25% less power compared to previous amoled display generations. However that 25% value is something we have to trust samsung on I think, at least I have not seen any actual tests on power consuption of the display alone and it's probably not easy to test.
The way they have managed the display to consume less power is to use use phosphorescent instead of fluorescent green diodes, which use way less power. Until now they could not produce the green ones with an acceptable lifetime. The red ones have already been phosphorescent, and the blue one are still fluorescent since they are hardest to produce.
See here for some further details: http://www.phonearena.com/news/Sams...een-PHOLED-screen-tech-but-what-is-it_id40715
Hironimo said:
Thaty what one hears, yes.
However I would like some actual test reports - for instance how long does the phone last for web browsing, for video playback and on standby?
I would like to see actual numbers.
Click to expand...
Click to collapse
This. This so many times over.
So many people are parroting the "Exynos will have better battery life" thing but this really remains to be seen.
If the better battery life is in exchange for crippled A7 performance at inconvenient moments then it's useless. If better battery life isn't available for when you're using intensive apps then it's also useless.
Dear Community,
In this thread I want to gather a sample to investigate to what extent the S4 suffers form overheating and how this affects the battery drainage/life. I urge you to participate as I am collecting a sample to submit a formal complaint to Samsung to raise awareness to an issue that is widespread among S4 users and to push Samsung to address this issue accordingly. In order to provide your sample please follow the instructions below and report back in this thread with the relevant information. Please first indicate which variant you have: Quad/Octa (i9505 or i9500)
Please download BatteryGraph (it's a great app to measure Battery drainage accurately) https://play.google.com/store/apps/details?id=com.modroid.battery
Run it once after download to initiate logging. Let it run for 10 minutes to allow the graph to built up a bit.
Then please Download Antutu benchmark run the benchmark fully exactly 5 times back to back (continuously). After that please enter the stock dialer (as quickly as possible) and enter *#0228# and post the temperature (external thermistor) after the tests in order to determine the maximum temp that the device reaches under continuous stress.
After that, please enter the app Battery Graph and zoom into the graph to the maximum level. Scroll slowly along the curve at the time when you performed the Benchmarks and tell me if there are interruptions or 'skips' where the battery drops 1 or 2 percent at a time and where the App does not Register a graph for those drops. Sequence/scroll slowly along the graph 1% at a time and make sure that the battery dropped 1% at a time. Please report of the battery has dropped more than 1% at a time. Please make a screenshot of your battery graph in the App and post it here for collection. I will analyze the graphs subsequently and compile it in SPSS to submit our findings.
If there is a drop of 2 or 3% at a time it means that you are experiencing Battery Percentage skips/cliffs which could indicate either a defective battery or defective device which might be the cause for the extensive heat development.
Thank you for your participation. Hopefully Samsung will listen to us and address the issue to give us the perfect S4 that we deserve.
Best,
Thomas from Germany
exxi said:
Dear Community,
...
Thank you for your participation. Hopefully Samsung will listen to us and address the issue to give us the perfect S4 that we deserve.
Best,
Thomas from Germany
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Click to collapse
That battery app polls for battery level changes every 5 minutes by default. I think almost every device will experience a drop of more than 1% every 5 minutes under constant stress testing. You can change it to poll every 1 minute in the settings, which you might want to mention, but even so isn't it entirely possible to lose more than 1% a minute with everything turned on (GPS, Gestures, etc.) and ~17 minutes of constant cpu/gpu stress testing? It's a nice idea but it doesn't sound like it would yield very accurate results, unless I've misunderstood your post.
EDIT: Nevermind, I see how you can step through it 1% at a time now.
Meltus said:
That battery app polls for battery level changes every 5 minutes by default. I think almost every device will experience a drop of more than 1% every 5 minutes under constant stress testing. You can change it to poll every 1 minute in the settings, which you might want to mention, but even so isn't it entirely possible to lose more than 1% a minute with everything turned on (GPS, Gestures, etc.) and ~17 minutes of constant cpu/gpu stress testing? It's a nice idea but it doesn't sound like it would yield very accurate results, unless I've misunderstood your post.
I've also noticed that you cannot really zoom in very far and at the highest zoom setting the % is still displayed in multiples of 10. Kind of tricky to differentiate between a 1% and a 2% drop.
Click to expand...
Click to collapse
You might be right, what would you suggest in order to yield more accurate results? I suspect that the heat is directly linked to a very quick drainage of the battery. How can we measure how much it affects the actual battery drainage?
exxi said:
You might be right, what would you suggest in order to yield more accurate results? I suspect that the heat is directly linked to a very quick drainage of the battery. How can we measure how much it affects the actual battery drainage?
Click to expand...
Click to collapse
I'm not criticizing you or anything and I'm not saying it's a bad idea, It's just that obtaining accurate battery results are tricky as everyone's device is different, has different settings enabled and are running different kernels/ROMs/etc. Batteries also seem to get more efficient as time goes on so newer devices might suffer from higher battery drains.
I'll run the battery temp test now though and see how hot mine gets!
I like your critical thinking, obviously you are right it is very trick but I believe the heat test itself could be very indicative. In the meantime I will try to find a better way to measure battery drainage.
So everyone please try to run the benchmark multiple times and submit the temperature.
The most I was able to get was 52C
Thanks
Pre-test: 29.9°C
After 3 tests: 35.0°C
After 5 tests: 37.7°C
After 7 tests: 38.4°C
After 10 tests: 38.8°C
The temperature increased less and less so I don't know how much higher I could get it.
Also, an easier way to poll the temperature is to do "adb shell dumpsys battery" over ADB. The temp will be displayed as something like 388 which means 38.8°C
Edit: It might be worth noting that the top of the phone, around the camera but more so on the screen side (so the cpu?) got incredibly hot. Almost too hot to touch. Kinda worrying, but I have spent the last half an hour stress testing, I guess
Meltus said:
Pre-test: 29.9°C
After 3 tests: 35.0°C
After 5 tests: 37.7°C
After 7 tests: 38.4°C
After 10 tests: 38.8°C
The temperature increased less and less so I don't know how much higher I could get it.
Also, an easier way to poll the temperature is to do "adb shell dumpsys battery" over ADB. The temp will be displayed as something like 388 which means 38.8°C
Edit: It might be worth noting that the top of the phone, around the camera but more so on the screen side (so the cpu?) got incredibly hot. Almost too hot to touch. Kinda worrying, but I have spent the last half an hour stress testing, I guess
Click to expand...
Click to collapse
Thanks for your contribution Meltus! Really appreciated my friend. Also thanks for the ADB command it does make it easier but I doubt that you've read the correct temp as 38 appears to be quite low compared to what i got. Is your S4 a i9505 ?
exxi said:
Thanks for your contribution Meltus! Really appreciated my friend. Also thanks for the ADB command it does make it easier but I doubt that you've read the correct temp as 38 appears to be quite low compared to what i got. Is your S4 a i9505 ?
Click to expand...
Click to collapse
It's also the temperature that dialling *#0228# gave me (I double checked they were both the same each time). And no, I have an i9500, running Omega ROM, if that helps.
Might want to mention the elementary precaution of taking off all case covers except for the stock case before testing to prevent insulation effect of case covers increasing battery temperature...
While you're at it you might want to standardize room temperature to 25 degrees C... I know for a fact that my device would never get hot no matter what it does if running in the freezing cold air-con'd metro...
What about brightness settings and whatnot. Should all be the same, so you have to give a standard.
Pre-test: 36.2°C
After 3 tests: 51.4°C
After 5 tests: 54.6°C
After 7 tests: 56.9°C
dafaq right??? im really annoyed at sammy for this overheating S4... after 7 times testing the Antutu, i stopped and LITERALLY put my S4 in the lower compartment of the refrigerator to get it cooled down quickly cause im pretty sure the heat sensors inside would definitely be having some testing errors and the temperatures would be really really higher than that. even when i swipe between different homescreens the phone gets to 47°C which is really annoying.
can someone pls for the LOVE OF GOD provide any solution to this freaking problem? i have been worrying a lot for spending my $730 on an overheating phone...
i have S4 i9500 Exynos version
---------- Post added at 10:02 AM ---------- Previous post was at 10:01 AM ----------
oh and i have half the brightness all the time for everything and auto brightness turned off
Are you talking about the battery temperature? If so something is extremely wrong with your unit, my battery temperature never went past 45 even with high stress.
If in case you are pointing out the cpu temperature then there is no reason to freak out because the cpu can handle upto 90c + and can cool off pretty fast
Edit:
And why on earth you ran Antutu for 7 times continously lol? None of the current generation phones can handle it for 7 times on a row afaik
Sent from my GT-I9500 using Tapatalk 4 Beta
bala_gamer said:
Are you talking about the battery temperature? If so something is extremely wrong with your unit, my battery temperature never went past 45 even with high stress.
If in case you are pointing out the cpu temperature then there is no reason to freak out because the cpu can handle upto 90c + and can cool off pretty fast
Edit:
And why on earth you ran Antutu for 7 times continously lol? None of the current generation phones can handle it for 7 times on a row afaik
Sent from my GT-I9500 using Tapatalk 4 Beta
Click to expand...
Click to collapse
You can read the CPU temp instead of the battery temp?
bala_gamer said:
Are you talking about the battery temperature? If so something is extremely wrong with your unit, my battery temperature never went past 45 even with high stress.
If in case you are pointing out the cpu temperature then there is no reason to freak out because the cpu can handle upto 90c + and can cool off pretty fast
Edit:
And why on earth you ran Antutu for 7 times continously lol? None of the current generation phones can handle it for 7 times on a row afaik
Sent from my GT-I9500 using Tapatalk 4 Beta
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Click to collapse
im talking about the cpu temps. i ran antutu cause it was asked to be done for this thread.
and why would it be silly to run any app 7 times on the flagship device? its made to run the apps as much as people want thats why we pay a huge amount of money for these devices dont we? or else we should buy the low end devices
just saying cause i had heating up issues with devices before infact my last device Note 2 used to get a lot hot but not as much as this S4...
i desperately need a solution for this...
Joe0Bloggs said:
You can read the CPU temp instead of the battery temp?
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Yes we can read cpu temp and battery temp separately, use system tuner app to read cpu temperature.
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aami.aami said:
im talking about the cpu temps. i ran antutu cause it was asked to be done for this thread.
and why would it be silly to run any app 7 times on the flagship device? its made to run the apps as much as people want thats why we pay a huge amount of money for these devices dont we? or else we should buy the low end devices
just saying cause i had heating up issues with devices before infact my last device Note 2 used to get a lot hot but not as much as this S4...
i desperately need a solution for this...
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You are not buying a flagship device just to run Antutu n number of times, do you? yes I accept we do pay huge money but that doesn't mean we can push the limit of a mobile and complain about it from a general user perspective . , it can be only done for experimental purposes and to understand the power /thermal envelope provided that it's done in the right way.
But how does running Antutu 7 times matches a real life scenario? Highly unlikely isn't it?
We are already pushing the limits of raw cpu power for a mobile, raw a15 cores are power hungry and often tend to heat faster than previous generation. Hence arm introduced the big little. The mobile heats up during heavy stress, but but that's expected with these powerful cores right? I'd better utilize the power wisely when needed rather than using it all the time. The cpu indeed gets hotter when stressed, it's the same With my s3 too the cpu temps reached upto 80,there is built in throttling mechanisms which will take of the cpu once the cut off temperature is reached. Have seen many benchmarkers these days using freezer test due to the thermal throttling in new gen devices. Yes the s4 heats up pretty quick than other mobiles but also cools down pretty fast and I think that's the way it is destined to work.
Hei one more thing, did you note how long it took to fallback to normal temps?
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bala_gamer said:
Are you talking about the battery temperature? If so something is extremely wrong with your unit, my battery temperature never went past 45 even with high stress.
If in case you are pointing out the cpu temperature then there is no reason to freak out because the cpu can handle upto 90c + and can cool off pretty fast
Edit:
And why on earth you ran Antutu for 7 times continously lol? None of the current generation phones can handle it for 7 times on a row afaik
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We were doing it to see if there was a correlation between excessive battery drain and overheating batteries. Mine never got any hotter than 40 and I have pretty great battery life. The OP was seeing temps of 50+ and I'm guessing he has poor battery life.
Could there have been a few batches of bad batteries sent out with devices?
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Meltus said:
We were doing it to see if there was a correlation between excessive battery drain and overheating batteries. Mine never got any hotter than 40 and I have pretty great battery life. The OP was seeing temps of 50+ and I'm guessing he has poor battery life.
Could there have been a few batches of bad batteries sent out with devices?
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Are you talking about battery temperature or cpu temperature? Haven't heard any stories so far regarding damaged battery, but may be possible.
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Thanks for the Updates > and clear step to analize the issue to fix in next Sw update
Thanks for your efforts ]
Dear Community,
In this thread I want to gather a sample to investigate to what extent the S4 suffers form overheating and how this affects the battery drainage/life. I urge you to participate as I am collecting a sample to submit a formal complaint to Samsung to raise awareness to an issue that is widespread among S4 users and to push Samsung to address this issue accordingly. In order to provide your sample please follow the instructions below and report back in this thread with the relevant information. Please first indicate which variant you have: Quad/Octa (i9505 or i9500)
Please download BatteryGraph (it's a great app to measure Battery drainage accurately) https://play.google.com/store/apps/details?id=com.modroid.battery
Run it once after download to initiate logging. Let it run for 10 minutes to allow the graph to built up a bit.
Then please Download Antutu benchmark run the benchmark fully exactly 5 times back to back (continuously). After that please enter the stock dialer (as quickly as possible) and enter *#0228# and post the temperature (external thermistor) after the tests in order to determine the maximum temp that the device reaches under continuous stress.
After that, please enter the app Battery Graph and zoom into the graph to the maximum level. Scroll slowly along the curve at the time when you performed the Benchmarks and tell me if there are interruptions or 'skips' where the battery drops 1 or 2 percent at a time and where the App does not Register a graph for those drops. Sequence/scroll slowly along the graph 1% at a time and make sure that the battery dropped 1% at a time. Please report of the battery has dropped more than 1% at a time. Please make a screenshot of your battery graph in the App and post it here for collection. I will analyze the graphs subsequently and compile it in SPSS to submit our findings.
If there is a drop of 2 or 3% at a time it means that you are experiencing Battery Percentage skips/cliffs which could indicate either a defective battery or defective device which might be the cause for the extensive heat development.
Thank you for your participation. Hopefully Samsung will listen to us and address the issue to give us the perfect S4 that we deserve.
Best,
Thomas from Germany[/QUOTE]
bala_gamer said:
Are you talking about battery temperature or cpu temperature? Haven't heard any stories so far regarding damaged battery, but may be possible.
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Battery temperature. If someone's experiencing temperatures in excess of 50C and bad battery drain it would indicate a problem.
One thing that has always bothered me is how quickly (relatively) the battery drains on any android phone i've had in the past 6 years when typing. I can read articles, scroll webpages and whatnot for hours...but if I'm having a heavy day of instant messaging, my battery drains much faster. This makes sense due to way that this phone and most android phones ship with the ondemand governor. Just to test, and you can try this too, in better battery stats or some other app that can monitor CPU speeds, set a custom reference and then type for one minute in a note keeping app or an instant messaging app. Then go back and check. What you'll find is that the CPU frequency stays at max 80% of the time or more, because the screen is being touched the entire time. So to me, that is horribly inefficient.
I went ahead and bought an iPhone 6s to try to see if iOS handles typing better, and it does. I can get about 6-7 minutes of nonstop typing before the battery drops 1%, whereas on mine it can be anywhere from a minute and half to 3 minutes tops.
I want to see if I can clamp down on this so I found this post but it's very specific to the Nexus 5x: http://forum.xda-developers.com/nexus-5x/general/guide-advanced-interactive-governor-t3269557/page51
What do you guys think? I'm not nearly well versed in this kind of stuff so I need some help. Let me know!
I agree, it's a very crude and inefficient way of doing it. Android is designed for maximum fluidity so they assume that every time you touch the screen the cpu will be put under load, thus the cpu ramps of the frequency - this is commonly known as touchboost. If you have a custom kernel like dorimanx you can modify it to lower the touchboost frequency and various settings so it could potentially lower battery usage during input. Although I don't know if it's worth it considering all of the various potential problems that go along with such a kernel..
iOS and android are so fundamentally different that I doubt you can (easily)modify it to perform like ios in a given workload. However, each manufacturer has their own flavor of android so they may be optimized differently. Either try several different models or just go with an iphone since you've tried it and seemed to like it - or you could always wait for android n which will hopefully be more clever and efficient..
you could try intellimn this stays at lower freq, when more power its needed it boots to higher frequencies. that along with allucard hotplug. should save battery this is with dorimanx kernel.
with ondemand its the same. or if you want more lower use smartassv2
I returned the iPhone. The fact that it doesn't repeat notifications for missed calls is abhorrent to me. I need to be able to glance at my phone and know that I've missed a call with the screen lighting up every few seconds or a LED light.
So I'm definitely sticking with the G2 for now.
If I install another kernel to give me more governor options, how difficult is it to put back the stock AT&T lollipop kernel? Can I back it up first in any way?
ksc6000 said:
I returned the iPhone. The fact that it doesn't repeat notifications for missed calls is abhorrent to me. I need to be able to glance at my phone and know that I've missed a call with the screen lighting up every few seconds or a LED light.
So I'm definitely sticking with the G2 for now.
If I install another kernel to give me more governor options, how difficult is it to put back the stock AT&T lollipop kernel? Can I back it up first in any way?
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Yes you could either use twrp and back up boot. or use flashify from playstore to back up stock kernel.
ksc6000 said:
One thing that has always bothered me is how quickly (relatively) the battery drains on any android phone i've had in the past 6 years when typing. I can read articles, scroll webpages and whatnot for hours...but if I'm having a heavy day of instant messaging, my battery drains much faster. This makes sense due to way that this phone and most android phones ship with the ondemand governor. Just to test, and you can try this too, in better battery stats or some other app that can monitor CPU speeds, set a custom reference and then type for one minute in a note keeping app or an instant messaging app. Then go back and check. What you'll find is that the CPU frequency stays at max 80% of the time or more, because the screen is being touched the entire time. So to me, that is horribly inefficient.
I went ahead and bought an iPhone 6s to try to see if iOS handles typing better, and it does. I can get about 6-7 minutes of nonstop typing before the battery drops 1%, whereas on mine it can be anywhere from a minute and half to 3 minutes tops.
I want to see if I can clamp down on this so I found this post but it's very specific to the Nexus 5x: http://forum.xda-developers.com/nexus-5x/general/guide-advanced-interactive-governor-t3269557/page51
What do you guys think? I'm not nearly well versed in this kind of stuff so I need some help. Let me know!
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So this is not a scientific test at all, but I usually will use whatsapp for messaging nonstop during my 1 hour lunch at work. No browsing or anything else is usually included in that. I have a few conversations going so I'm typing and getting messages non stop. Previously that would decrease the battery by 22% or so. Now by switching my governor to interactive and making tweaks to it using EX Kernel Manager, with this it's down to 14%. I will admit there is some minor stutter when first turning on the screen with the settings I'm using so I'm sure I need to keep tweaking but my main concern is the battery life while typing.
Previously as I mentioned if I'm typing, the CPU speed would go up to max and stay there until I'm done typing for a few seconds. Now with these tweaks my CPU speed barely goes up above 960 MHz...most of the time it's between 640 or 883. I think that's the reason I'm getting 4 to 4.3 minutes of screen time now while typing instead of getting anywhere between 1 and 1/2 minute or 3 at best while typing.
ksc6000 said:
So this is not a scientific test at all, but I usually will use whatsapp for messaging nonstop during my 1 hour lunch at work. No browsing or anything else is usually included in that. I have a few conversations going so I'm typing and getting messages non stop. Previously that would decrease the battery by 22% or so. Now by switching my governor to interactive and making tweaks to it using EX Kernel Manager, with this it's down to 14%. I will admit there is some minor stutter when first turning on the screen with the settings I'm using so I'm sure I need to keep tweaking but my main concern is the battery life while typing.
Previously as I mentioned if I'm typing, the CPU speed would go up to max and stay there until I'm done typing for a few seconds. Now with these tweaks my CPU speed barely goes up above 960 MHz...most of the time it's between 640 or 883. I think that's the reason I'm getting 4 to 4.3 minutes of screen time now while typing instead of getting anywhere between 1 and 1/2 minute or 3 at best while typing.
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if you use smartassv2 its lower.