SSH connection timeout

Hello, I am trying to flash Jetson Xavier NX (developer kit) with Jetpack 4.6.1 using initrd. I am using samsung 970 evo SSD 500GB (Not brand new, I already used it with jetson before - systemd-switchroot). My host machine running ubuntu 20.04.

I tried with this command:

sudo ./nvsdkmanager_flash.sh --storage nvme0n1p1

It failed with:

Waiting for target to boot-up...
Waiting for device to expose ssh ....................................................................................................................................................................................
...Timeout
Cleaning up...

Same result with this repo https://github.com/jetsonhacks/bootFromExternalStorage.

I also tried this command (I changed num_sectors to 964689920 before):

sudo ./tools/kernel_flash/l4t_initrd_flash.sh --external-device nvme0n1 -c ./tools/kernel_flash/flash_l4t_nvme.xml -S 450GiB  --showlogs jetson-xavier-nx-devkit nvme0n1p1

It failed with:

Error: Return value 4
Command tegraparser_v2 --generategpt --pt flash.xml.bin
Error: Linux_for_Tegra/bootloader/signed/flash.idx is not found

How to fix it?

Could you follow this tutorial and remember to download the secureboot package?

https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%20Linux%20Driver%20Package%20Development%20Guide/flashing.html#wwpID0E0PI0HA

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