System startup failed

Operation process:
At present, we use the official Ubuntu system which has been configured in advance (without any changes to the underlying system) and packaged it as an IOS image. When we use it, we record it to the memory card and insert the nano board.

Existing problems:
At present, when using the same batch of memory cards, the nano board will only display the NVIDIA logo image when it is turned on, and cannot enter the system. Serial port printing card in “starting kernel…”

Test results:
After testing, the problem can be solved by re installing the system or replacing other development boards.

Is this still an issue here?

What kind of “other development boards” is it?

Jetson Nano 4G B01

Then what was the original board that has problem?

    1. First the official image is OK;
    1. Second I use the command sudo dd bs=4M if=/dev/sdc of=/home/miao/nano_back.img" to clone my own Img;
  • Third i use balenaEtcher to flash my Img in anther SD card, but my image can not start; Serial terminal print in “starting kernel…”;then the system restart;

replacing other development boards.

So did you change any hardware here? Could you post the full log?

nano_back.img

What if you use dd with official image? Will you still hit problem?
This step is to prevent something wrong in your nano_back.img.

kernel_log.txt (19.8 KB)

Please do reply other questions. Talk more about this issue would help clarify what is going on…

Just some questions to clarify this problem.

    1. First the official image is OK; → So does dd and etcher work fine for this?
    1. Second I use the command sudo dd bs=4M if=/dev/sdc of=/home/miao/nano_back.img" to clone my own Img; → So does this work or not?

installing the system or replacing other development boards. → Are you saying that changing the module will let your 3rd case sdcard work?

On a motherboard, there is no problem using official img. If you make a by yourself, you will have a problem that you can’t access the system.The problem is the document above.

The problem is I don’t know how you “make a one by yourself”.

What is inside this /dev/sdc?

if=/dev/sdc?

This is an example, you can check the usage of dd.

Err… yes I know how to use dd.
But I just want to know what is the input here? If you don’t give us any information, how do we know if your dd command input is correct?

if=/dev/sda.Insert SD into PC host and make system image with dd command.Burn the image to SD and start it after inserting it into the motherboard.But my image can not start; Serial terminal print in “starting kernel…”;then the system restart.

Please remove the quiet in /boot/extlinux/extlinux.conf and dump the log again.

The kernel side shall give out more logs.