After flashed,I found that the change didn’t work, the device still booted from mode 1: ‘[ 01 00 00 00 ] - Boot normal kernel and DTB in filesystem’.
In the boot log,I found this text ‘L4TLauncher: Attempting Direct Boot’.
However , I expected to find text 'L4TLauncher: Attempting Kernel Boot ’ in boot log.
I have tried with the bootloader-dtb partition to flash the device,it didn’t work.
sudo ./flash.sh -r -k bootloader-dtb jetson-agx-xavier-devkit mmcblk0p1