This is a follow up on this thread: NX production module not detecting external sd card reader
I am able to mount the rootfs from the carrier board’s SD card and run almost everything as normal. The only issues are related to the fact that there is an unused rootfs in the eMMC that the bootloader reads the extlinux.conf from. This means that any dtb changes (such as ones from JestonIO) on the external SD card do not affect the system.
So, my main question is how do I change this? How do I get the system to read the extlinux.conf from the external SD card? Following this post (Boot from external drive), I assumed I could use l4t_initrd_flash.sh, but I’m not sure what the proper parameters would be.