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Original topic:

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

(Topic created on: 05/08/18 13:23)
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.

 

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Carolll
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After some days of usage with july security patches i noticed that my phone still heats more if i do not activate offline mode even without using it. You could say "of course it heats more on mobile data" but it should be (kinda) normal only when actually using the phone, not while it's sitting there doing nothing, so there's a problem

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Mesho
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So there is still no reason for safe update to Oreo? Ok... I begin to don't care about it, Nougat works for me enough good, battery suffice my whole day, phone isn't heating.  

Do you know any way to get rid of update notifications without touching system (root, knox triggering stuff etc)? Clearing and stoping BadgeProvider stops it only for one, maybe two days. 

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dj1891
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@Mesho wrote:

So there is still no reason for safe update to Oreo? Ok... I begin to don't care about it, Nougat works for me enough good, battery suffice my whole day, phone isn't heating.  

Do you know any way to get rid of update notifications without touching system (root, knox triggering stuff etc)? Clearing and stoping BadgeProvider stops it only for one, maybe two days. 


Flash the CSC from another firmware stops it.

 

One thing I noticed is this thead used to be far more active up until the July update, its then all gone quiet, I can only assume most aren't having issues now.  I'm still not impressed with the update, been running it a couple of weeks now, battery life still *****.

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James0071
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I haven't been issued with July update yet, in UK, so can't comment. From what I've heard on this thread it doesn't solve the inherent problem and Samsung seem unwilling (unable?!) to address it. 

 

This thread has been going on for some time and I would be interested to hear if anybody has more to add. There has certainly been a lot of useful information passed around here from people, notably with the absence of Samsung, perhaps unsurprisingly. (Thanks to those who have contributed.) Personally I feel a lot more in the know since seeing so many helpful comments. 

 

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Joakim
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In my opinion the main reason is that most of people simply stopped using Samsung S7 phones. By the way, sales of S9 are very weak, even Samsung confirmed it.

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dj1891
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I'm gonna see what apple offers next month, I'm tempted to go back.

Xsever
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Once again, I've been using a stock-based Oreo ROM from xda called Devbase 5.9 which has the latest ERG2 modem and ERG8 bootloader and battery life is better than Nougat. The latest update by Samsung should have updated the modem to erg2 which should have fixed the drain problem as is the case here. The drain for me using LTE at night with everything syncing is 1.3%/h.

seban25
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For four days I have been using the latest BTU version with July patch and I have not had any problems, there is no battery drain, it even lasts longer than in Nougat. My s7 edge duos has 10 months and reached 24 hours of use without any problem.
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VSiam
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I want to point out that with latest July update some countries/CSC will get latest ERG2 modem and others - old ERD6 from the first Oreo release. For example, UK/BTU and Germany/DBT firmware contain ERG2 and Nordic/NEE and Poland/XEO - old ERD6. This may be important in our case. You can check it before downloading at updato.com, after clicking at firmware there is "more info" page and the last line is "Phone G930FXXU2ERG2". PDA can be ERG2 or ERG7 which is not big deal.

 

@Mesho, you can flash just different modem for your model, this will stop any OTA update and will not trigger knox or official status (secure folder etc will work). The point is - broken integrity of firmware will stop OTA. Or you can try to disable system updates in developer options first.

 

Also I think it's a good time to ask @AntS about current status of our case. One more month passed. Do you have some news from internal bugtrack system?

 

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Joakim
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I've got ERD6 and the battery drain is still here - how can I get ERG2 ?

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VSiam
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@Joakim, you can download firmware, extract modem/CP file you want and flash it with Odin.

 

Current modem version check -  Settings/About/Software - Baseband

PistachioBandit
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For those still having issues: For me personally flashing the unbranded Dutch version (ERG2), uploaded on July 18th on SamMobile seems to have fixed the issue (there still seems to be an occasional hiccup every now and again). I had the UK version before. I flashed all 4 files and I used home_csc so I wouldn't have to reinstall everything.

 

Side note: Samsung has been a major p.i.t.a. lately. In reality they're no different from Apple and their crappy ways of doing business. This thread has 45 pages, and it's not over yet. And there are many others out there. It simply shouldn't be this difficult to find a solution for a problem on a device we all paid top money for. I'm definitely gonna be looking elsewhere for my next phone.

Joakim
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Guys, sorry for my questions, but I'm a noob as it comes to using not original firmware.

 

1. Will it void the warranty? My S7 edge is only a month old.

2. What firmware should I choose? I mean thanks to VSiam I know that I have to flash ERG2, but can it be from another country, as in my there's only ERD6 available? And do I have to flash only modem or the whole firmware? Thanks for answers.

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VSiam
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ERG2 modem for G930F (Flat):

https://anonfile.com/s5VeEbfeb5/CP_G930FXXU2ERG2_CP10089541_CL13895453_QB18811252_REV00_user_low_shi...

ERG2 modem for G935F (Edge):

https://anonfile.com/ZcYdE5fcbf/CP_G935FXXU2ERG2_CP10089532_CL13895453_QB18810069_REV00_user_low_shi...

 

@Joakim, You need to flash 1 file only. You will not trigger Knox or lose warranty as long as you flash original not modified files. But after flashing different modem you will not receive OTA updates until you revert it back. Also JFI if you flash different Bootloader, your firmware will change status from Official to Custom and Samsung Pay/Secure Folder/Health... will refuse to work, again until you revert bootloader back.

Flashing instructions at sammobile.com are pretty straightforward. You'll need to install drivers first:

https://developer.samsung.com/galaxy/others/android-usb-driver-for-windows (install, reboot, connect phone)

Entering Download mode is VOLUME DOWN + HOME BUTTON + POWER

CorvusA
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Screenshot_20180805-141724_Settings.jpg

 

Screenshot_20180805-141806_Software update.jpg

 

With the last patch of July....40% cell standby, WTF!!!!???

Olli0371
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It seems that you firmware with July patch does not include erg2 modem.

But about 4 hours screen on - is that so bad for your phone ? (Assuming that you are mostly on mobile data).

Regards

Oliver

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Joakim
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@VSiam thanks for help.

 

One more question: does anybody know when other countries will get offcially ERG2 modem firmware? Cause it's incomprehensible that some countries received it and the others not... It's not a problem like face unlock or any other useless function, but a thing that makes our phones useless 😕

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Sika17
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I've installed the new update 2 days ago (july security patch (ERG2)) and still have the problem that my battery drains much quicker than with android Nougat. Since the update it doesn't display cell standby as the biggest user anymore, but it also doesn't display the right battery usage percentages anymore (in picture below, total usage is 100-74=26%, but when you add the different percentages per app it only amounts to 10%). I know there can be some difference because of the rounding of the percentages, but a difference of more than 2.5 times is a bit too much. So I think they didn't really solve the cell standby problem, but tweaked the battery usage somehow so it doesn't show cell standby as the biggest user.

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dj1891
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@Sika17 wrote:

I've installed the new update 2 days ago (july security patch (ERG2)) and still have the problem that my battery drains much quicker than with android Nougat. Since the update it doesn't display cell standby as the biggest user anymore, but it also doesn't display the right battery usage percentages anymore (in picture below, total usage is 100-74=26%, but when you add the different percentages per app it only amounts to 10%). I know there can be some difference because of the rounding of the percentages, but a difference of more than 2.5 times is a bit too much. So I think they didn't really solve the cell standby problem, but tweaked the battery usage somehow so it doesn't show cell standby as the biggest user.

 

Yes that was exactly my findings also.  Battery life didn't get any better but there was no 1 thing standing out that was eating the battery like before.


 

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Joakim
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So it seems that ERG2 firmware did not solve the problem. So we are back to square one... I don't wanna grizzle, but in my opinion Samsung plays cat and mouse with us 😕

mite_jan
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New update in the Uk ERGE

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