Sleep Of Death On Mi4c

Discussion in 'Xiaomi Mi 4C' started by Eli k, Jan 24, 2018.

  1. Eli k

    Eli kMembers

    Dec 27, 2017
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    Hi guys
    I have a mi4c for quite a while, and lately it has been starting to reboot everytime the screen is off
    I set screen to never turn off, and it would not reboot until battery does or screen was off.
    So i figured it must be a sleep issue.
    So i upgraded to miui to latest eu rom 8.1.18
    And still, everytime screen went off it rebooted.
    When i left screen on even without any activity it would stay on no problem.

    Did anyone had this problem?
    Any solution?
     
  2. iamme729

    iamme729Members

    Nov 22, 2015
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    I have a Mi4c that just randomly reboots...its about 2 year old its done it form day one... I have never found a solution to the problem...I believe its hardware related (battery)......
     
  3. Eli k

    Eli kMembers

    Dec 27, 2017
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    I was thinking it was the battery aswell
    So i put it in the shop for batt replacement.
    This dis not help.

    It only reboots when screen is off

    When i set my screen not to turn off, it works normally.
     
  4. iamme729

    iamme729Members

    Nov 22, 2015
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    Very odd indeed....
    Have you tried using wake lock app ? I did ...no help...
    Sent from my Mi-4c using Tapatalk
     
  5. Bojin

    BojinMembers

    Sep 2, 2017
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    Hi,
    I don't this problem on my two mi4C
    Do you try a clean install ?
     
  6. iamme729

    iamme729Members

    Nov 22, 2015
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    As I had said before this is the phone I have loaned out as soon as I get it back I am going to do some experimenting with it ...I will post my findings .....
     
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  7. Ramzessso

    RamzesssoMembers

    Feb 15, 2018
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    Hey all,
    I have the same problems with my Mi4c. When it is in the sleep mode, then after 10 seconds it resets itself ....
    This problem started about 3 weeks ago (without system actualization). Then full wipe, new system and still nothing. I bought new battery and still the same problems.
    Does anyone any idea what and how with it?
     
  8. Ramzessso

    RamzesssoMembers

    Feb 15, 2018
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    So, there is no solution for this?
     
  9. iamme729

    iamme729Members

    Nov 22, 2015
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    I have not found a solution yet.....
     
  10. Ramzessso

    RamzesssoMembers

    Feb 15, 2018
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    So I would rule out system problems, I tried full flashing with stable versions, including V9.2.2.0.NXKCNEK etc. + for this new battery, because I came across a suspected defective battery, but all the time it is the same. As for the equipment, what could have failed? On a blank screen there are no problems, etc. Only when the screen goes out then screen resets. What is responsible for keeping it as if in standby mode?
     
  11. iamme729

    iamme729Members

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    One thing you could try is "wake lock app " see if that works...in my case it did not ...I think its caused by an abnormal voltage drop in the memory but I cant be positive....
     
  12. linuxghost

    linuxghostMembers

    May 9, 2013
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    This is a well known problem with this phone. It affects hundreds of not thousands of Xiaomi MI4c users...
    My wife has this phone and this problem too so I had to do some research and order a new battery.

    My best guess is that it is a combination of
    1 the battery
    2 the (fast) battery loader and
    3 the phone's BMS (faulty?)

    The 4c is AFAIK the first Xiaomi phone with (perhaps then not yet fully tested) quick charger. So in some fora the advice is not to use the included fast charger but to use a "slow" charger. Prove that it's a hardware rather than a software problem is that TWRP reports the same percentage. (right or wrong because of faulty BMS in motherboard?)

    I hope my two cents worth can help you with this problem.

    Verstuurd vanaf mijn Mi Note 2 met Tapatalk
     
  13. iamme729

    iamme729Members

    Nov 22, 2015
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    Did replacing the battery help ?
     
  14. linuxghost

    linuxghostMembers

    May 9, 2013
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    Ordered three days ago @ Alibaba.
    Not yet delivered. ;-)
    It is my intention to keep you informed.

    Verstuurd vanaf mijn Mi Note 2 met Tapatalk
     
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  15. Ramzessso

    RamzesssoMembers

    Feb 15, 2018
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    I tested it with new original battery and it was the same, reset, reset, reset.... etc
     
  16. linuxghost

    linuxghostMembers

    May 9, 2013
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    Do you use the quick charger?
    If yes, then try another (not quick) charger.

    Verstuurd vanaf mijn Mi Note 2 met Tapatalk
     
  17. linuxghost

    linuxghostMembers

    May 9, 2013
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    I'm curious about your MI4c problem Ramzessso. Did you experience a fast drop in battery percentage like in the screenshot?
    Is the percentage of the battery load the same as well in MIUI as in TWRP?
    If the latter is the case then it cannot be a software problem AFAIK.[​IMG]

    Verstuurd vanaf mijn Mi Note 2 met Tapatalk