I got a vim3 yesterday, installed krescue into an sdcard and from there, I installed ubuntu focal 20.04 into the MMC.
From there, I tried to upgrade u-boot to mainline u-boot, so I followed the steps in the documentation, setting the board as vim3, mainline kernel, mainline u-boot, SD card (as there was no EMMC option).
I got the .deb package, installed & rebooted, and… the system never got up again. Something about corrupted file system.
Ok – scratch that. I started again, installed the same ubuntu, and decided to only update the kernel. Same story. I was able to reproduce make the .deb image, and after installing it and rebooting, the system wouldn’t boot anymore because of corrupted filesystem (this time I have the uboot console to do something).
I am not sure how to proceed. What is the recommended way of updating the kernel on the eMMC? Well, I don’t really care whether it’s on the emmc or an sd card, but I just want to be able to run a custom kernel
Can anyone point me on the right direction?