Constant reboot issue on Mi 9 SE (grus)


gustavofalcao1

Members
Mar 15, 2022
3
3
Hello everybody. I'm having a very annoying problem with this smartphone for a while.

Smartphone: Xiaomi MI 9 SE (grus)

Initially it was restarting a few times, when it was in standby, after some time it started to restart and when it came back it had less battery than before.
So even though I thought it wouldn't work, I tried to solve it at the software level, and I came across a problem connecting to the computer, so I changed the type C connector and did all possible procedures, even using custom rom, but nothing worked.

I soon thought that it could only be the battery, given the fact that it came back from the reboot with about 10 to 20% less. But I just got the new battery and the problem continues...

I even tried to leave the side buttons disconnected, to see if the power, was not having some kind of short. But he restarted the same way.

I don't know what to try or think about it anymore, I didn't just want to leave it aside as a "Handboard or serial problem", I wanted to try everything and learn from it... That's why I want to hear your experience with this type problem, whether with this model or another.

I apologize for my English, and if I posted this in the wrong place, I'm new here.

And thank you in advance for everyone's help, and for the existence of this community as a whole!
 

werty

Members
Jun 13, 2018
417
67
Hello everybody. I'm having a very annoying problem with this smartphone for a while.

Smartphone: Xiaomi MI 9 SE (grus)

Initially it was restarting a few times, when it was in standby, after some time it started to restart and when it came back it had less battery than before.
So even though I thought it wouldn't work, I tried to solve it at the software level, and I came across a problem connecting to the computer, so I changed the type C connector and did all possible procedures, even using custom rom, but nothing worked.

I soon thought that it could only be the battery, given the fact that it came back from the reboot with about 10 to 20% less. But I just got the new battery and the problem continues...

I even tried to leave the side buttons disconnected, to see if the power, was not having some kind of short. But he restarted the same way.

I don't know what to try or think about it anymore, I didn't just want to leave it aside as a "Handboard or serial problem", I wanted to try everything and learn from it... That's why I want to hear your experience with this type problem, whether with this model or another.

I apologize for my English, and if I posted this in the wrong place, I'm new here.

And thank you in advance for everyone's help, and for the existence of this community as a whole!
This is a forum for xiaomi.eu rom based on china rom. But you should try to flash latest fastboot rom with MiFlash - search google for guides.
Note: Choose Clean all and not Clean all and lock in lower right corner of MiFlash.
Good luck, werty
 
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gustavofalcao1

Members
Mar 15, 2022
3
3
This is a forum for xiaomi.eu rom based on china rom. But you should try to flash latest fastboot rom with MiFlash - search google for guides.
Note: Choose Clean all and not Clean all and lock in lower right corner of MiFlash.
Good luck, werty
OK. I've always used the ROMs here, and that's why I asked the question here. I tried to do as you said but it didn't work, I'm totally lost, I don't know what could be causing this and I can't find anything on the internet.
I'm considering running a Linux system and see if the problem persists, I don't know what else to try and I practically gave up the smartphone as lost, I just want to find out what caused it out of curiosity and knowledge.

So if anyone has any more tips, please I'm trying anything.
 

werty

Members
Jun 13, 2018
417
67
OK. I've always used the ROMs here, and that's why I asked the question here. I tried to do as you said but it didn't work, I'm totally lost, I don't know what could be causing this and I can't find anything on the internet.
I'm considering running a Linux system and see if the problem persists, I don't know what else to try and I practically gave up the smartphone as lost, I just want to find out what caused it out of curiosity and knowledge.

So if anyone has any more tips, please I'm trying anything.
What do you mean by didn't work. You couldn't be able to flash the fastboot rom or the issue persists after you flash it?
 

ruvlad

Members
Jul 7, 2019
6
15
I have the same issue here.
Xiaomi MI 9 SE (grus) + Xiaomi.EU Stable 12.5 (xiaomi.eu_multi_MI9SE_V12.5.4.0.RFBCNXM_v12-11).
Clean installation with all the pre-steps. I have not modified the system partition or installed Magisk modules. I don't use AOD or special battery saving modes.
I noticed that there are fewer reboots if I use a third-party "Caffeine - Keep Screen On" app that doesn't allow the screen to turn off.
Perhaps random reboots are happening due to the work of the governor or a kernel bug, but I can't confirm it, I just assumed.