1. Sandi1987's Avatar
    I have problem with 100% CPU usage at idle since i buy it on Xiaomi Redmi Note 8 Pro. Battery draining so fast especially in games. CPU Usage never goes below 25% at idle. Bad unit or?

    Should i downgrade OS to MIUI 10?
    04-13-2020 01:05 AM
  2. B. Diddy's Avatar
    Does it also use 100% CPU in Safe Mode? https://www.getdroidtips.com/boot-xi...pro-into-mode/
    04-13-2020 01:44 AM
  3. Sandi1987's Avatar
    Yes. Battery drain is the same in Safe Mode. Do i got bad unit?
    04-13-2020 02:38 AM
  4. B. Diddy's Avatar
    Sounds like that could be the case. What are you using to measure the CPU acitivity?
    04-13-2020 03:08 AM
  5. Sandi1987's Avatar
    CPU-Z and CPU Monitor.

    What's wrong with my phone? Bad CPU, battery or it's just OS?
    04-13-2020 04:59 AM
  6. B. Diddy's Avatar
    I'd guess either corrupt firmware or a faulty CPU. The first thing to try would be a factory reset.
    04-13-2020 12:51 PM
  7. Sandi1987's Avatar
    I did Factory Reset and it's the same.
    04-13-2020 04:46 PM
  8. mustang7757's Avatar
    You have insurance or warranty?
    04-13-2020 04:58 PM
  9. B. Diddy's Avatar
    Next step would be to reinstall the firmware, if possible. Try this: https://c.mi.com/thread-2637280-1-0.html. (Sorry, but I wouldn't be able to help in more detail, since I have no experience with this process.)

    Otherwise, look into getting a replacement if the phone is still under warranty, or bring it to a repair shop.
    04-13-2020 06:30 PM
  10. Sandi1987's Avatar
    I had the same problem with Xiaomi Redmi 8A and it had even higher CPU usage at idle with no apps opened then Redmi Note 8 Pro. I bought it in the same store.
    04-13-2020 07:06 PM
  11. Sandi1987's Avatar
    I think it's not OS because i lose 1% battery just in Fastboot Mode after 1 minute. What about bad battery?
    04-13-2020 11:20 PM
  12. mustang7757's Avatar
    I think it's not OS because i lose 1% battery just in Fastboot Mode after 1 minute. What about bad battery?
    Check in CPU-Z app what the battery volts and temp at, can give some indication , and yes lower voltage or failing battery can cause issues on CPU . But these things only a real good repair shop can test .
    04-13-2020 11:42 PM
  13. Sandi1987's Avatar
    Here is CPU-Z screenshot.
    Attached Thumbnails Xiaomi Redmi Note 8 Pro CPU Usage 100% at idle-screenshot_2020-04-14-08-14-00-757_com.cpuid.cpu_z.jpg  
    04-14-2020 01:16 AM
  14. mustang7757's Avatar
    04-14-2020 01:26 AM
  15. Sandi1987's Avatar
    So, it's CPU or bad battery? Battery Drain start when i first time turn on phone. The same with Redmi 8A.
    04-14-2020 02:18 AM

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