How to check the fuse enable (RSA or SBK key) date and value？

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

I got Jetson Xavier NX in hand, and try to re-flash.

But it show error tips:

[Either RSA key file and/or SBK key file is not provided for SBK and PKC protected target board]

After learned from this earlier post, I knew it was locked (fuse enabled). To me, It’s mean this module is encrypted.

So, Is there any way or any tools to check what date it’s enabled ?
(how to check when it’s enableed the RSA or SBK encrypted)

Looking forward reply

4

Hi wayne.wei2,

Are you using the devkit or custom board for Xavier NX?
What’s the Jetpack version in use?

Do you mean that you are using a fused module?

Please run the following command on your board and share the result.

$ sudo nv_fuse_read.sh
5

Are you using the devkit or custom board for Xavier NX?
What’s the Jetpack version in use?

Answer：with the official carrier board （production version）. Just received from E-store personal seller. Can’t tell the version. Because it keeps rebooting when I power it up.

===================================================

Do you mean that you are using a fused module?
Answer：learned from the re-flashed error tips, It should was fused before I got the Xavier NX module suit.

===================================================

Please run the following command on your board and share the result.
Answer： Can’t do any operation on it. It keeps rebooting when I power it up.
The phenomenon is when I power it up——> Monitor show the LOGO screen——> Enter the CMD window and flash the startup code——> Entering the black screen, there is only a flashing cursor(can’t input any word) ,about 30 or 45 seconds——> Self Reboot. Can’t get in the Ubuntu system at all

It will continuously cycle the reboot of the above process. That’s why I think the eMMC’s system is collapsed and needs to be re-flash. Until I saw the error tips.

6

What I mean is that you are using our official devkit or the custom carrier board developed by 3rd-party?

If you are using a fused module, you must have the PKC and SBK key to perform flash process.
Please ask your vendor for those details and the flash steps. Someone should be able to flash that module before so that it is fused.

We can not help or guess what is happening on your board w/o any serial console log provided.

7

I want to make sure first：

If I forever lost the PKC and SBK key, then there is no way to find out which date it was enabled fused function, right ?