I am one who experiences repeated boot failures on R1, particularly following kernel updates, even if there has been no version change to u-boot. My work-around has been to re-write the u-boot loader to /dev/mmcblk2, following a kernel update. I would like to try the use of mmcblk2boot0, as described in:
The procedure references Bootable_eMMC, which requires executing command “mmc”, with options. That command is not found in IPFire, nor is the package “mmc-utils” that would provide it. Is this command required, before writing u-boot to mmcblk2boot0 ?