Three days I've been trying to work out why I couldn't boot from the #IOT2050's internal eMMc disk, despite loading different variants of Debian OS on it.

Today I found that the firmware's fw_printenv boot_targets didn't show mmc1 in the results. The mmc1 is the eMMc disk!

I add it back with: fw_setenv boot_targets "usb0 usb1 usb2 mmc0 mmc1" , and suddenly, I can boot from it again!

🎉🎉🎉🕺🤓