Jetson Nano 4GB P3448-0000

Robotics & Edge Computing Jetson & Embedded Systems Jetson Nano
1

Hi,

I got a jetson nano module which is for devkit ( P3448-0000 the som with a sdcard slot )

I try to use sdkmanager to flash J4.6.6 and log shows flash success

But after it reboot, it just stuck at NV’s logo where uart log show it stop at uboot

I enter “boot”, it enter the kernel and I can login to the system

Some questions:

  1. Can I skip the step “enter “boot”” in Uboot to use the device?
  2. The flash.sh command will be “sudo ./flash.sh jetson-nano-devkit mmcblk0p1”?
  3. After I login to the system, uart always show many garble message, is it normal?

Here’s boot uart log and sdkmanager debug log
boot_uart.txt (20.8 KB)

SDKM_logs_2025-03-19_15-18-37.zip (1.2 MB)

2 
>ubuntu login: 
Ubuntu 18.04.6 LTS ubuntu ttyS0

����������������8�������������������������ਉչ�Ձlogin: 
Ubuntu 18.04.6 LTS ubuntu ttyS0

ubuntu l��������������������buntu login: 
Ubuntu 18.04.6 LTS ubuntu ttyS0

ubuntu login: �����������������������������չ�Ձlogin: 
Ubuntu 18.04.6 LTS ubuntu ttyS0

����������������������������������������|ubuntu login: 
Ubuntu 18.04.6 LTS ubuntu ttyS0

ubuntu login: ��������������������������ubuntu login: �Ubuntu 18.04.6 LTS ubuntu ttyS0

�����������������������������������չ�Ձlogin: 
Ubuntu 18.04.6 LTS ubuntu ttyS0

���������������>�ubuntu login: 
Ubuntu 18.04.6 LTS ubuntu ttyS0`

I saw the uart console is already there waiting for you to enter and login. Did you configure any account there?

As for the garbled message, what is the command you are using to enable serial log?

3

Hi,

I have preconfig username and password by using sdkmanager

sudo minicom

By the Way

It’s weird that I reflash the image last night then it is normal now

There’re too much experiment to list since several days

Is it possible that static electricity noise cause "Hit any key to stop autoboot " to be trigger in uboot?

4

sudo minicom

Please set the baud rate to 115200 explicitly.

Is it possible that static electricity noise cause "Hit any key to stop autoboot " to be trigger in uboot?

Don’t know what you are talking about here. Your log provided yesterday didn’t have any problem in uboot either.

5

The baud rate always 115200 for our usage

image
image651×180 17.2 KB

actually it stuck here

image
image498×238 21.6 KB

“boot” is the command I entered, so it enter to kernel

6

Oh ok. Then it is indeed something wrong in the UART as noise that triggered the keyboard.

Do you have other wire for the UART? If this is devkit, I think hardware problem is more related.

7

Hi,

Thanks for reply

We will conduct some tests on hardware

The ticket can now be closed. Thanks again

8

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