Getting “CPU Bootloader is not running on device” error when flashing Nvidia Jetson Xavier NX to Jetson Linux 35.1

I’ve been trying to manually flash my Nvidia Jetson Xavier device (SKU
110061381) to Jetson Linux 35.1 via Nvidia’s Board Support Tools (BSP).

I have been able to successfully flash my device to Jetson Linux 35.1 via the SDKManager GUI tool in the past; however, I must use the command-line tools because I would like to disable OP-TEE in Jetson Linux 35.1, which requires manual flashing as explained by this Nvidia forum post.

I followed all the instructions for manual flashing outlined on your Wiki and I I downloaded both the Driver Package and Sample Root File System from Nvidia’s official wesbite.

To summarise, I ran the following terminal commands for a manual flash:

$ cd Linux_for_Tegra/rootfs/
$ sudo tar xpf ../../<SAMPLE_FS_PACKAGE>
$ cd ..
$ sudo ./
$ sudo ./ jetson-xavier-nx-devkit-emmc mmcblk0p1

However, the manual flash consistently is stuck at CPU Bootloader is not running on device. as shown below:

[   7.6626 ] Applet version 01.00.0000
[   8.7760 ] Sending blob
[   8.7762 ] [................................................] 100%
[   9.5566 ] tegrarcm_v2 --boot recovery
[   9.5580 ] Applet version 01.00.0000
[  11.6817 ] tegrarcm_v2 --isapplet
[ 1016.0394 ] tegrarcm_v2 --ismb2
[ 2031.8470 ] tegradevflash_v2 --iscpubl
[ 2031.8505 ] CPU Bootloader is not running on device.

I’ve also attached the entire log to help with debugging: cpu-bootloader-not-running-on-device.txt (62.9 KB)

For context, I am flashing via an x86 laptop (not a VM) running Ubuntu 20.04. I have been able to flash my Xavier several times to Jetson 35.1 using Nvidia’s official SDKManager GUI application on the same laptop without any issues or errors. However, as mentioned earlier, I must use the command-line tools for manual flashing because I want to disable OP-TEE.

Any support on this would be greatly appreciated.