Using a 4.x kernel inside a nfsroot was not easy until now, because aufs file system support was dropped from the Debian kernel package. Instead overlayfs was added. But currently FAI does not work using overlayfs.
That's why I've built a kernel package including aufs support with kernel 4.4.6. It's now available in the jessie package repository at fai-project.org. Add this package name to /etc/fai/NFSROOT: linux-image-4.4.6-fai-amd64 You should also check if you have included the package dracut (additional to dracut-network) in /etc/fai/NFSROOT. This is needed since dracut 044+3-2 and was not yet added to the FAI packages. After rebuilding your nfsroot, you can use the kernel 4.4.6 with FAI. -- regards Thomas
