How to close and enter the UEFI interface

Hi 1712127445,

Are you using the devkit or custom board for AGX Orin?

Please refer to the following thread and apply the patch.
Close or hide UEFI menu - #3 by KevinFFF

Please reflash the board instead of just updating bootloader partition.

$ sudo ./flash.sh jetson-agx-orin-devkit mmcblk0p1

Do you hit the flash issue after you apply the UEFI image built from r35.4.1-updates? If so, could you try to build UEFI image from r35.4.1?