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Original topic:

Cell Standby/Android System/Google Play Services battery drain for Oreo on S7

(Topic created on: 19/08/18 10:23)
James0071
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Hi, 

 

I really like my S7 Edge. However as a direct result of installing the Oreo update I have significant battery drain. The drain is attributable to cell standby which sometimes reaches over 50% of battery use. It definitely did not do this on Nougat, ever. 

 

I have not added any apps to cause this problem and would really like a suggestion about what to do. I can't believe Safe Mode will have any effect as this has happened as a result of the upgrade, not rogue apps. I am not keen to do a factory reset either as I can't see the benefit. I have cleared the cache, removed some apps, restarted etc, turned off any battery hungry options in settings but to no avail.

 

If anybody could help me I would be very grateful. I believe it is a bug in Oreo or Samsung's altered version of Oreo but cannot prove either. I can't think what to do apart from find out how to downgrade back to Nougat, which I don't want to do.

 

Many thanks.

 

739 REPLIES 739
AdrianCIty
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glad I'm not the only one. I tried all of the above, non of it helped. I hope this is not a marketing stunt; updating your phone to make your battery worse to force you to buy a new one. I really enjoy my s7 edge, until the Oreo update...

SmashMix
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Thanks for reminding me about another issue which came after Oreo update :winking-face:
In addition to famous "cell standby battery drain" I have also noticed that phone is heating more than before on Nougat. Actually S7 Edge WAS first phone for me which doesn't heat in normal daily use. After Oreo update Samsung has "fixed" this also. Now phone is heating even in average use (same use as before on Nougat) without playing games etc.
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DiegoPereira
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@SmashMix wrote:
Thanks for reminding me about another issue which came after Oreo update :winking-face:
In addition to famous "cell standby battery drain" I have also noticed that phone is heating more than before on Nougat. Actually S7 Edge WAS first phone for me which doesn't heat in normal daily use. After Oreo update Samsung has "fixed" this also. Now phone is heating even in average use (same use as before on Nougat) without playing games etc.
 
 
 
honestly, I did not notice much difference here about heating.
the phone is better in practically everything with the oreo update, however, unfortunately, only need to correct the cell standby problem.
I hope this topic reaches the programmers of the Samsung smartphone division.
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SmashMix
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No one is saying that S7 Edge with Oreo is somehow worse than one with Nougat. I actually really like Oreo and these small improvements came with it, but bugs are not letting me to fully enjoy the update. I hope I explained my opinion clearly enough :winking-face:
Back to noticed heating issue: I think that the phone is heating more after update. Unless I can't remember that I felt heated phone in my hands before the update or at least not so often as right now. IMHO.

Well, it is obvious that Oreo was poorly optimized and tested before it was widely released and has some (also yet unknown I guess!) bugs along with some improvements :face-with-tears-of-joy:

Franky5
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After a whole day of use, the Cell Standby process isn't that of a problem, sure it isn't gone (3 to 4% while using wifi, 7% when using cellular data) but it is less aggresive compared to the 20 to 28% before trying the Background Process Limit thing.

I think it is thanks to that, since Cell Standby is a background process and limiting the amount may not let it be active all the time, but I'm not sure though, it may be for a random reason, because 

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DiegoPereira
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After one day using the options to limit the processes in the background in three, and also activating not to use data in the background, the device continues to consume a lot, but a little less than previously. in the last test he consumed 12% versus 19-20% before changing the options described above.

is still definitely not a solution, just a way to soften the problem.

My device is S7 Edge

Screenshot_20180620-015530_Settings.jpg

 

 

 

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DiegoPereira
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I decided to do a factory reset again, and this time I will not install the April security patch, and then post the results here.

Remembering that previously before making the update of the security patch of April 1, did not present the "cell standby" during the first day.
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tbd
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But as far as I know you will have to flash the firmware via Odin, because if you do a factory reset in the menu it will still be on the last firmware version before the reset (with the security patch).

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DiegoPereira
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@tbd wrote:

But as far as I know you will have to flash the firmware via Odin, because if you do a factory reset in the menu it will still be on the last firmware version before the reset (with the security patch).


I did the procedure by turning the device on by pressing volume up, home and power, I entered the boot screen and selected the reset factory data option. In this way, the update I made soon after the other time, starts being requested again.

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tbd
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Okay, so what is your patch-level now?
For me (in Germany with CSC DBT) there was only one Oreo-update yet and it had the April-patch already included.

In fact the April-patch already came before the Oreo-update when the phone was still on Nougat.

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DiegoPereira
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@tbd wrote:

Okay, so what is your patch-level now?
For me (in Germany with CSC DBT) there was only one Oreo-update yet and it had the April-patch already included.

In fact the April-patch already came before the Oreo-update when the phone was still on Nougat.


on my device after factory reset, April 1 appears in the security patch, however, strangely and later the device requests an automatic update of an April 1 security patch again with the file size of approximately 76 mb, and only after I perform this new update, is that the problems begin here.

so actually what I'm doing now is returning to the oreo factory update without doing this "new" update that was requested.

 

Just to inform, using the oficial oreo rom from UK flashed via ODIN, and Im from Brazil.

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DiegoPereira
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Updating ....

I made the reset factory, and to my surprise this time the cell standby appeared alone without me even accepting the update .. I am disappointed.

now I have 3 options:

1 - Keep the Oreo and live with this problem and expect a future correction, which may or may not happen.

2 - return the device to the Nougat and have a slightly better battery that currently has the current problems.

3 - return the marshmallow downgrade and take advantage of the best possible battery performance compared to nougat and oreo.

Maybe I'll keep oreo for a few more days or a month, to see if they'll fix this in the next update.

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Tester3
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For whats it worth I used a solution posted earlier by Franky5 and it worked for me.

 

To start a I have a Verizon Galaxy s7 edge with Oreo. I have been plagued since the moment I upgraded the OS to Oreo with battery drain and a constantly hot device. My battery would only last 4-5 hours and the cell standby was responsible for 40-50% of that battery drain.

 

I tried wiping the cache first, monitoring the battery drain over a few days of usage - no success as the problem still existed. Then, I tried resetting to factory defaults, monitoring the battery drain over a few days of usage - no success. 

 

Then I came across Franky5's solution and decided to try it. To my amazement it seems to have worked for me. Franky5 suggested a couple of solutions but I only tried the following:

"Go to developer options (By clicking several times on build version, in software information) and changing the Background Process Limit, I set it to 3"

 

I've now tested this solution for a couple of days and my cell standby usage went from 40-50% to 2%. That's just amazing. My battery drain seems to be close to what I was getting on Nougat prior to the Oreo(although maybe still a little more that Nougat by 5-10%.) But a least with the fix I can make it through the day without needing to charge as I did with Nougat.

 

I have to admit something I found weird though. I went back into the Background Process Limit setting and it was set back to Standard Limit. I did not change it back to this, it changed magically. BUT, this battery drain problem did go away when I changed this setting and it has not returned even though the setting changed back. I haven't done anything else that may be responsible for solving the issue. I use my phone in the same physical area and my cell coverage/signal strength has been consistent throughout including using 4G.

 

Thanks to Franky5.

 

l3ulky
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@Tester3 wrote:

For whats it worth I used a solution posted earlier by Franky5 and it worked for me.

 

To start a I have a Verizon Galaxy s7 edge with Oreo. I have been plagued since the moment I upgraded the OS to Oreo with battery drain and a constantly hot device. My battery would only last 4-5 hours and the cell standby was responsible for 40-50% of that battery drain.

 

I tried wiping the cache first, monitoring the battery drain over a few days of usage - no success as the problem still existed. Then, I tried resetting to factory defaults, monitoring the battery drain over a few days of usage - no success. 

 

Then I came across Franky5's solution and decided to try it. To my amazement it seems to have worked for me. Franky5 suggested a couple of solutions but I only tried the following:

"Go to developer options (By clicking several times on build version, in software information) and changing the Background Process Limit, I set it to 3"

 

I've now tested this solution for a couple of days and my cell standby usage went from 40-50% to 2%. That's just amazing. My battery drain seems to be close to what I was getting on Nougat prior to the Oreo(although maybe still a little more that Nougat by 5-10%.) But a least with the fix I can make it through the day without needing to charge as I did with Nougat.

 

I have to admit something I found weird though. I went back into the Background Process Limit setting and it was set back to Standard Limit. I did not change it back to this, it changed magically. BUT, this battery drain problem did go away when I changed this setting and it has not returned even though the setting changed back. I haven't done anything else that may be responsible for solving the issue. I use my phone in the same physical area and my cell coverage/signal strength has been consistent throughout including using 4G.

 

Thanks to Franky5.

 


I've tried this, but unfortunately, it has made no difference 😞

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Droiderat
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@Tester3 wrote:

For whats it worth I used a solution posted earlier by Franky5 and it worked for me.


In theory, changing Background Process Limit to 3 (or to anything other than "Standard") should worsen battery life, not improve  it.

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Carolll
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@Droiderat wrote:

@Tester3 wrote:

For whats it worth I used a solution posted earlier by Franky5 and it worked for me.


In theory, changing Background Process Limit to 3 (or to anything other than "Standard") should worsen battery life, not improve  it.


It will only worsen it if you are always multitasking with tons of apps all the time. If you just use one app it will improve your battery life. The best thing would definitely be stop all the useless pointless background processes that samsung activates on our phones without asking nor allowing to stop them but you know, we can't. 

 

Found the standby cell issue on A5 2017 too. It seems that they can't manage to get out of this

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Droiderat
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@Carolll wrote:

@Droiderat wrote:

@Tester3 wrote:

For whats it worth I used a solution posted earlier by Franky5 and it worked for me.


In theory, changing Background Process Limit to 3 (or to anything other than "Standard") should worsen battery life, not improve  it.


It will only worsen it if you are always multitasking with tons of apps all the time. If you just use one app it will improve your battery life. The best thing would definitely be stop all the useless pointless background processes that samsung activates on our phones without asking nor allowing to stop them but you know, we can't. 

 


You are not correct, and you don't understand how this works.  As is sometimes stated, it might better be called the "Background Cache Limit".  What it does it set the number of apps that can be cached in memory (assuming that you have enough memory).  Setting it to 3 limits the number of apps in the cache to 3, even if you have an extra GB of RAM.  If it is set to "Standard", then the OS only wipes out the cache on an "as needed" basis.  Why does setting it to 3 increase battery usage?  Because it takes more battery to load an app from ROM than it does to load it from RAM.  Setting the number lower forces apps out of the cache, and therefore forces them to be reloaded the next time they are used (and they *will* be reused).  It is helpful for debugging, but it absolutely isn't doing what you think it is doing, and it isn't helping to save your battery (because your phone is using many more than 3 apps at all times).  It increases your battery usage, as well as impairing your performance (it makes the phone slower).  In essence, this setting change is a self-inflicted gunshot wound.

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Carolll
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@Droiderat wrote:
You are not correct, and you don't understand how this works.  As is sometimes stated, it might better be called the "Background Cache Limit".  What it does it set the number of apps that can be cached in memory (assuming that you have enough memory).  Setting it to 3 limits the number of apps in the cache to 3, even if you have an extra GB of RAM.  If it is set to "Standard", then the OS only wipes out the cache on an "as needed" basis.  Why does setting it to 3 increase battery usage?  Because it takes more battery to load an app from ROM than it does to load it from RAM.  Setting the number lower forces apps out of the cache, and therefore forces them to be reloaded the next time they are used (and they *will* be reused).  It is helpful for debugging, but it absolutely isn't doing what you think it is doing, and it isn't helping to save your battery (because your phone is using many more than 3 apps at all times).  It increases your battery usage, as well as impairing your performance (it makes the phone slower).  In essence, this setting change is a self-inflicted gunshot wound.

Of course it's meant for devs so the standard behaviour will be the best in most cases. Also I don't think that making the launcher reload every time you press Home would be enjoyable. However, it would be pretty hard for anyone here to really know if the other users understand things. Non-cached-apps reload power consumption does not interfere on the same level as the standby cell issue because it's related to a modem/mobile data issue (as far as we know), so the problem we are trying to figure out here is not about loading apps. Limiting cached background apps probably can block something related to the standby cell issue that is not directly related to the limit itself (*plot twist*), in fact the user that experienced the improvement stated that the battery drain caused by the standby cell issue was gone even if the limit had gone back to standard.

 

@Buddhimal wrote:
Can u help me to flash my s7 edge.
Im in a trouble

I think you'd better go to XDA forums 

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KornelB
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Hi guys, 

 

Just had a chat with one of Samsung's executives in Romania after I've sent them at least a dozen of emails regarding this issue and I was astonished when he told me that I am probably the only one reporting this problem in Romania and Bulgaria.  Of course that's a lot of bull but just to be sure, is there anyone from Romania or Bulgaria (Samsung Bulgaria is affiliated to Samsung Romania) experiencing the battery drain on an S7 Flat with the following update ?: 

 

Baseband: G930FXXU2ERGC 

Built: R16NW.G930FXXU2ERGE

Security Patch: 1 July 2018 

 

Please let me know. 

 

gural2309
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S7 FLAT in Poland still no update.

 

Baseband: G930FXXU2ERD6

Built: R16NW.G930FXXU2ERE8

Security Patch: 1 April 2018 

 

Battery standby after whole day reach 50% (as they told me its a bug and still it dont drain battery). Thats wierd because screen (14%) and system (8%) use whole 24%  and i have now 16%. My battery performance on nougat was 12-14h without energy saving and now it's live for 10-12h without AOD, HD resolution, CPU lowered ferq. What is this SAMUNG !?

AlfS41
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According to Sammobile in some european countries there is a new S7 firmware: G930FXXU2ERH1 with august security level patch.

In this website you can find changelist of this update: https://www.androidinfotech.com/2018/08/samsung-galaxy-s7-sm-g930f-august-2018-ota.html  In the second half of the list you can find "Battery drain issue Fixed."  Has anyone tried this update yet?

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