How to load backup when primary failed automatically?

[sadaa]

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?

[JerryChang]

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

[sadaa]

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

[JerryChang]

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.