Pi3B+ automatically shutdown while the temperature is less than 65' C

[Shawn1913]

Hi all,

I'm using Raspbian Stretch with desktop which published at 2018 JUNE.

I'm doing some performance testing with Pi3B+ by running my application, the application is just keep send/write data via TCP/IP and USB serial port to some devices.

It all looks good at beginning hours(say 6 hours), but later, I noticed the Pi just shutdown it self (no screen show, no keyboard response), I have to unplug and plug in the power cable to bring it back.

I've logged the performance counters every 60 seconds in testing by using

Code: Select all

/opt/vc/bin/vcgencmd

related commands and

Code: Select all

 top -n 1

for logging temp, volt, frequency, CPU/Memory usage from the beginning to shutdown, I can see the temp was keep rising from 51'C to 63.4'C, volt is quite stable around 1.3625V, frequency is quite stable by jumping at 1400000000 or 600000000, CPU usage is range from 10 to 30, memory is always around 10.

Anyone could help, where I can find the root cause of the shutdown, if it's caused by heat (though i don't believe so since it's far below the official https://www.raspberrypi.org/help/faqs/# ... emperature announced 85' C), the system must have some place to logged that, correct?

[Void Frost]

Correct me if i am wrong, (anybody) but raspberry pi requires 5 volts.
Do you see a lightning bolt symbol anywhere on your screen? That signals undervoltage.
I

[rpdom]

Correct me if i am wrong, (anybody) but raspberry pi requires 5 volts.

It does, for the main supply. On board there are many voltages (3.3V, 1.8V etc). The voltage listed above is the main chip core voltage.

[LTolledo]

Keep it cool then...

Provide/attach an appropriately sized heatsink

Test again....

If it still fails... provide even larger heatsink, or attach a fan

Test again....

[MaxK1]

Could it be a memory leak? Does anything show in the logs? (in /var/log/ )

[Shawn1913]

Keep it cool then...

Provide/attach an appropriately sized heatsink

Test again....

If it still fails... provide even larger heatsink, or attach a fan

Test again....

Is there any place(system log) logged the over heating case? i actually suspect the LAN chip since its dead temp is 70.

[Shawn1913]

Could it be a memory leak? Does anything show in the logs? (in /var/log/ )

could you more specify, what logs I should to check under /var/log/ since there're plenty?

[DougieLawson]

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