SBC reliability issue

[AndreyB]

A year ago I had Orange PI soldered to MREadapter72 and I vaguely recall a problem of sporadic reboots, back than I did not properly research it.

Something similar is now happening with nanopi duo2: when powered from eBay lab power supply I experience random reboots. I have armbian Debian with linux on a RO partition and a /rw folder only for user files mounted in RW mode.

While booting I see current jumping back and forth between 0.15A and 0.6A, at the moment it's ugly alligator clips powering board via eBay jumper wires.

To stress CPU I execute

Code: Select all

sudo stress --cpu  8 --timeout 1200

[AndreyB]

andreika does not approve thin jumper wires for 0.5A current

Powered from a wall USB via fancy pink cable I got two successful 20 minute runs

Code: Select all

pi@nanopiduo2(ro):~$ date ; sudo stress --cpu  8 --timeout 1200
Mon 19 Apr 2021 05:25:52 AM UTC
stress: info: [2898] dispatching hogs: 8 cpu, 0 io, 0 vm, 0 hdd
stress: info: [2898] successful run completed in 1200s
pi@nanopiduo2(ro):~$
pi@nanopiduo2(ro):~$
pi@nanopiduo2(ro):~$
pi@nanopiduo2(ro):~$ date ; sudo stress --cpu  8 --timeout 1200 ; date
Mon 19 Apr 2021 05:48:13 AM UTC
[sudo] password for pi:
stress: info: [15563] dispatching hogs: 8 cpu, 0 io, 0 vm, 0 hdd
stress: info: [15563] successful run completed in 1200s
Mon 19 Apr 2021 06:08:15 AM UTC
pi@nanopiduo2(ro):~$

All commands invoked via wifi SSH, TTL used only for kernel reboot monitoring.

[AndreyB]

Back on power supply and things work now

At this point while I am sure that I had a few random reboots I have no steps to reproduce the problem.

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