2

Not direct an answer to your question but maybe a help to examine what's going on with the bootloader. The Raspberry Pi 4B has an EEPROM now where you can set a debug flag BOOT_UART=1 as described at Pi4 Bootloader Configuration. Then the boot loader will output low level debug information to the serial debug console on pins GPIO 14 and 15 so you need a USB ...


2

All your requirements are already available in my Nard SDK distro. It runs from RAM and there are ready made scripts for remote image upgrades. http://www.nard.se/


1

I switched the default shell to /bin/sh, essentially the variable BR2_SYSTEM_BIN_SH="bash" from busybox' default shell and I got the login prompt upon boot. With make menuconfig, it was available under System Configuration > /bin/sh I made some other changes as well, but I am quite sure this is what fixed it. I will accept my answer when I am ...


1

I've found solution here: http://buildroot-busybox.2317881.n4.nabble.com/BuildRoot-not-starting-with-Udev-td33140.html Udev requires re configuring kernel because new DEVTMPFS is needed.


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