10-07-2020, 08:53 PM
Well, you can do an experiment
First, and formost, if emmc is diasbled, does a good SD boot?
If so, blank emmc uboot (1st save emmc mbr, restore at end), re-enable emmc, then
run fdisk on good SD, note sector numbers (write down) delete all partitions
(later you will restore partitions with written down sector numbers)
This forces cpu to use uboot from SD, the only OS that it can find is on emmc,
might work, no guarantees
BTW, what ubuntu version? there are more than 1 I think
First, and formost, if emmc is diasbled, does a good SD boot?
If so, blank emmc uboot (1st save emmc mbr, restore at end), re-enable emmc, then
run fdisk on good SD, note sector numbers (write down) delete all partitions
(later you will restore partitions with written down sector numbers)
This forces cpu to use uboot from SD, the only OS that it can find is on emmc,
might work, no guarantees
BTW, what ubuntu version? there are more than 1 I think