How to load backup when primary failed automatically?

Hi, I have renamed my kernel image to Image and Image_current and I have updated my extlinux.conf as well

TIMEOUT 30
DEFAULT primary

MENU TITLE L4T boot options

LABEL primary
      MENU LABEL primary kernel
      LINUX /boot/Image_current
      INITRD /boot/initrd
      APPEND ${cbootargs} quiet

# When testing a custom kernel, it is recommended that you create a backup of
# the original kernel and add a new entry to this file so that the device can
# fallback to the original kernel. To do this:
#
# 1, Make a backup of the original kernel
#      sudo cp /boot/Image /boot/Image.backup
#
# 2, Copy your custom kernel into /boot/Image
#
# 3, Uncomment below menu setting lines for the original kernel
#
# 4, Reboot

LABEL backup
   MENU LABEL backup kernel
   LINUX /boot/Image
   INITRD /boot/initrd
   APPEND ${cbootargs} quiet

My question is how to load backup kernel if loading primary kernel failed without user intervention?

hello sadaa,

you may interrupt the boot process and choose the different boot options.
please setup serial console, and looking for L4T boot options. thanks

Hi Jerry, Is there a way to avoid serial console and load the other option automatically?

hello sadaa,

you can only interrupt the boot process and choose the different boot options with extlinux.conf.
however, there’s Bootloader Redundancy for enabling A/B slots (flashing to the partitions) to avoid boot failure.