Nanopi R4s does not bootup after power off then on

[sami]

hello guys,

 

i recently observed a weird behavior with my nanopi R4s(jammy os).

when the power goes OFF then ON in like 5 seconds duration then the nanopi does not boot up at all!

i need to remove the adapter for like 15 seconds so it would be able to boot again!

 

is this normal?

[Werner]

Probably. I assume some capacitor needs to discharge to erase some transient  memory. Probably unfixable via software.

[fever_wits]

Hi,

I have a NanoPi R4SE which is the same except for the built in flash.
Regardless of the system, I also observed this effect that having to remove the cable for more than 5 seconds causes it to start again.
It's probably a quirk of the hardware.

[Junkman]

Hi, I observed the same issue on my nanopi r4s.

It's just weird, and yes, sometimes you need to remove the adapter and wait several seconds before it can boot up.

 

And sometimes, if you do this several times, the board cannot boot up.

 

Use out-of-tree kernel provided by https://wiki.friendlyelec.com/wiki/index.php/NanoPi_R4S#Flash_to_TF can fix this, but suffer from security fixes (the distro and kernel are frozen).

Edited November 25, 2023 by Junkman

[Junkman]

FYI, I'm using `Armbian_23.8.1_Nanopi-r4s_jammy_current_6.1.50` (2023-08-31) back then.

Edited July 10 by Junkman