Hi, Trumany!
I have not modified the devkit to enable auto boot, as I do not have the proper equipment to be able to do that.
Therefore I am not able to verify whether the TX2 4GB module (or the TX2 module for that sake) auto boots on the devkit.
I’ll compare the custom board with the P2597 schematic to see what the differences are, and report back with my findings.
-Magnus