media.extractor drains battery after 39.2.A.0.442 upgrade

[hrdlimar]

Xperia XZ after FOTA to 39.2.A.0.442 discharges battery during 8 hours to 0% even if it is not used.

A reason is media.extractor process which is running all the time in backgound. As it can be seen in adb shell:

User 29%, System 2%, IOW 0%, IRQ 0%
User 34 + Nice 325 + Sys 25 + Idle 833 + IOW 0 + IRQ 3 + SIRQ 1 = 1221

PID USER PR NI CPU% S #THR VSS RSS PCY Name
2396 mediaex 31 11 25% R 5 53852K 4364K bg media.extractor
13010 u0_a291 30 10 2% S 31 1084944K 90032K bg pl.solidexplorer2
669 system 12 -8 1% S 16 147952K 9828K fg /system/bin/surfaceflinger
10266 u0_a225 16 -4 0% S 85 2051104K 136208K bg com.cnn.mobile.android.phone
13866 shell 20 0 0% R 1 9116K 2200K fg top
13376 root 20 0 0% S 1 0K 0K fg kworker/u8:10
14457 root 20 0 0% S 1 0K 0K fg kworker/u8:12
3225 u0_a190 20 0 0% S 21 1716936K 74628K bg com.touchtype.swiftkey
389 root 20 0 0% D 1 0K 0K fg msm-core:sampli
4585 system 20 0 0% S 12 1585184K 36924K bg com.sonymobile.phoneusage
3809 root RT 0 0% S 1 0K 0K fg irq/19-408000.q
2369 root 0 -20 0% S 86 116036K 1084K fg /system/vendor/bin/thermal-engine
7 root 20 0 0% S 1 0K 0K fg rcu_preempt
3 root 20 0 0% S 1 0K 0K fg ksoftirqd/0
2845 system 18 -2 0% S 191 2612088K 275872K fg system_server

I have not figured out yet if any particular media file causes it, anyway this is new behavior, definitely this is a degrade compare to previos FW.

[davjac7]

Hi Cristofer,

Since the recent Android update to 7.1.1., my Xperia XZ's battery life has been almost cut in half. My usage has not changed.

Prior to the update, I would comfortably have 20+ hours battery on a full charge, now it is around 10 hours. Why is this, and how do I get my battery back to what it was?

Furthermore, the phone gets quite warm with normal usage.

So, since the update:

1) Battery life cut in half
2) Phone is constantly warm

I have repaired the device/factory reset 5 times, erased the SD card, tried with no SD card - still to no avail.

What can you advise?

Regards,
David.

[Christofer]

Hi @davjac7, sorry to hear this.

Based on your description of the phone being constantly warm it sounds like there is a process running continuously in the background. Do you experience any difference if you use it in safe mode for a couple of hours?

[davjac7]

After another factory reset the temperature seems to have stabilised. Further, the most recent update from a couple of days ago seems to have helped slightly. I'm actually following the advice by Emir written in his article here: /t5/FAQ/Improving-Battery-time-and-battery-enhancement-features/m-p/1217684#U1217684 So apparently after a reset the phone battery calibration requires around a week to stabilise. I'll wait for that time to lapse and monitor in the meantime.

[Christofer]

@davjac7 Thanks for letting me know! Don't hesitate to get back to me if you should have any further questions about this.