JP5.1.2: how to disable UEFI trying Recovery Boot

Autonomous Machines Jetson & Embedded Systems Jetson Xavier NX
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System: ConnectTech Photon with Xavier NX and Jetpack 5.1.2

This board is buried in a large machine and is not easily accessible. For reliability reasons I modified the system so that the onboard EMMC and the additional uSD card are mounted readonly. /var, /home, and /tmp are writeable through overlay filesystem. So the nonvolative storage should not go corrupted.

However, I managed to get to system to get into Recovery Boot. In UEFI NVIDIA Configuration/L4T Configuration/OS chain A status was unbootable. I changed that, and the system booted again normally since all file system were read-only.

This is no big deal on my desk, but it is a major problem when happening on a customer site. The power may got away at any time, and the system must withstand this.

Questions:

  • What triggers the change Normal->Unbootable in the first place?
  • Can I disable this? I know that that system will always be bootable since there are no writes to any fs.
  • Any further recommendations?
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Hi fchkjwlsq,

It is configured in UEFI.

Yes, you can remove this feature through removing line:1696 to line:1700 in L4TLauncher (edk2-nvidia/Silicon/NVIDIA/Application/L4TLauncher/L4TLauncher.c at r35.4.1 · NVIDIA/edk2-nvidia · GitHub) for this use case.

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