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Huge system battery drain

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HashDragon

Member
Oct 31, 2016
13
0
So I left my phone at around 90% yesterday night with both WiFi and data turned off with no apps running it background and when today I woke up all my battery was drained. I did some research and people suggested to delete google play cache etc which I did. I am still wondering about the real culprit and the reason behind this.View attachment 4582529

Sent from my Mi A2 using Tapatalk
 

hugopg

Senior Member
Jan 8, 2011
65
18
So I left my phone at around 90% yesterday night with both WiFi and data turned off with no apps running it background and when today I woke up all my battery was drained. I did some research and people suggested to delete google play cache etc which I did. I am still wondering about the real culprit and the reason behind this.View attachment 4582529

Sent from my Mi A2 using Tapatalk

See if your CPU cores are maxed out using this app (https://play.google.com/store/apps/details?id=com.cpuid.cpu_z&hl=pt_BR). Post a screenshot from the first screen.
 

HashDragon

Member
Oct 31, 2016
13
0

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hugopg

Senior Member
Jan 8, 2011
65
18
hi..this is the first screen.

You have the same problem that I had. (Not bad as yours...). As you can see, all the core clocks are at maximum speed, draining battery. The solution is to change the 'scaling governor' from 'interactive' to 'ondemand'... But to do so you need to unlock bootloader and root the device. I did this last night and my battery is fine now.

You could also delete the cache+data from google play services, and reboot your phone (turn wifi off!). You will not have the problem anymore (but if you switch the Wifi back 'ON' it will come back after a while).

See more abou this problem in the thread: https://forum.xda-developers.com/mi-a2/help/frequency-sd660-stuck-maximum-t3832366

Regards,
 

HashDragon

Member
Oct 31, 2016
13
0
You have the same problem that I had. (Not bad as yours...). As you can see, all the core clocks are at maximum speed, draining battery. The solution is to change the 'scaling governor' from 'interactive' to 'ondemand'... But to do so you need to unlock bootloader and root the device. I did this last night and my battery is fine now.

You could also delete the cache+data from google play services, and reboot your phone (turn wifi off!). You will not have the problem anymore (but if you switch the Wifi back 'ON' it will come back after a while).

See more abou this problem in the thread: https://forum.xda-developers.com/mi-a2/help/frequency-sd660-stuck-maximum-t3832366

Regards,

I see..well this sucks..this was not the usual case before, can you show me what a normal CPU profile looks like ?
also will this void my warranty if I root & unlock BL but not flash a custom ROM etc?
 

hugopg

Senior Member
Jan 8, 2011
65
18
I see..well this sucks..this was not the usual case before, can you show me what a normal CPU profile looks like ?
also will this void my warranty if I root & unlock BL but not flash a custom ROM etc?

The normal cpu in iddle looks like the SS i've attached... It should increase clock when you're actually doing stuff, but, if the phone is iddle it should go back to the 'lowest' setting, which is what is currently in my SS.
And it will probably void warrenty, but I'm not sure... Good luck!
 

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hugopg

Senior Member
Jan 8, 2011
65
18
how to do it? i have kernel auditor installed with rooted a2.

Go in the 'CPU' tab and change the 'scaling governor' from 'interactor' to 'ondemand' (you need to apply this in two itens, each item control 4 cores - its under the section "Big Governor" and "LITTLE governors") then reboot device.

Use cpu-z to confirm if the value was indeed changed.
 

DiesFrae

Senior Member
Aug 12, 2012
81
9
Quick solution is to reboot. Fixes the issue but it gets triggered again! Submit a ticket on the feedback app.. a lot of people are affected by the CPU maxing out
 

HashDragon

Member
Oct 31, 2016
13
0
See if your CPU cores are maxed out using this app (https://play.google.com/store/apps/details?id=com.cpuid.cpu_z&hl=pt_BR). Post a screenshot from the first screen.

really? Dont BS here, first of all Poco is twice the price and not yet available

It is just $50 more expensive and is available in India. No BS.
Xiaomi doesn't even reply to people or keep them updated like OnePlus does about the current issues and ETA of OTA.
 

mariotwj

New member
Jul 31, 2017
2
1
As for the cpu frequency, mine was like that until I stopped using the fingerprint and switched to trusted face.
It didn't get stuck ever since.
Now it discharges by 12% per hour without games, give it a try :good:
 

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    +1 , this sucks!!!


    I am really surprised we are facing this issue even after having Android One. Wish I had waited and gone for Poco.
    Poco will have their own bugs, don't worry.

    this is Xiaomi world, good hardware, good price & lot of bugs.
    1
    I have the same problem.. I switch off my data and WiFi overnight, close all apps and yet I am facing battery drain of almost 40-50% overnight. The screen time battery is also hardly 4-5 hours max. My phone is pretty new, just over a month. Any solutions to save battery drain??
    Seriously, you still haven't heard of the fingerprint bug?
    1
    Seriously, you still haven't heard of the fingerprint bug?
    Some people like to ask questions before looking for solutions themselves first. That's XDA nowadays. It's really sad..
    1
    Posting this on more threads to reach more users.

    To all of you annoyed by this issue. I created a new bug report on the miui website with more information than previous reports, so that developers don't mark this thread as "Need More Information". I've attatched a buglog and analyzed it myself, noticed an error that wasn't showing up before the bug happened. Please go to the link down below and "Confirm" the issue.

    http://en.miui.com/thread-4114089-1-1.html
    1
    Here is my battery status. I'm on sept update and my variant is Indian.