iMX8MINI tmu suddenly reaches critical point

cancel
Showing results for 
Search instead for 
Did you mean: 

iMX8MINI tmu suddenly reaches critical point

148 Views
trinhkhai
Contributor II

Hi Folks!

I have an issue with our custom board using imx8mini EVK as the reference design. The BSP we are using is L4.19.35

During thermal aging test, we check the SOC's temperature every 5 seconds base on the value of /sys/class/thermal/thermal_zone0/temp. The system seems to work  as normal condition, the problem occured when the temperature reaches critical point. At the same time, the value from /sys/class/thermal/thermal_zone0/temp reports 90℃ but the system gets shutdown and reports 98℃.

Does anyone have the same problem? Does this consider a normal behavior?

Update: This is a part of log

Fri Dec  4 20:49:23 UTC 2020

90000

[28154.898316] thermal thermal_zone0: critical temperature reached (98 C), shutting down

 

Message from syslogd@imx8mmrhino at Fri Dec  4 20:49:23 2020 ...

imx8mmrhino kernel: [28154.898316] thermal thermal_zone0: critical temperature reached (98 C), shutting down

         Stopping Session c2 of user root.

         Unmounting /run/media/mmcblk1p1...

[  OK  ] Stopped target Multi-User System.

[  OK  ] Stopped target Login Prompts.

 

Thanks and best regards,

Khai

0 Kudos
1 Reply

138 Views
igorpadykov
NXP TechSupport
NXP TechSupport

Hi Khai

 

probably chip is heating very fast, one can recheck critical point in dts:

https://source.codeaurora.org/external/imx/linux-imx/tree/arch/arm64/boot/dts/freescale/fsl-imx8mm.d...

 

Best regards
igor

0 Kudos