Currently, I have been attempting to write custom device drivers for the renegade board. Previous versions of the ubuntu server distro have had the proper linux-header packages. I attempted to test out some of my old kernel modules to find out that the newest images have been compiled with X86_64 (it appears to have been cross-compiled as the renegade is arm64). The linux-header package is missing the Kconfig infrastructure required for out-of-tree module compilation.