I've built and tested FAI 3.2.15 from an ubuntu hardy server (x86_64) using VMware instances, and they boot and install fine.
With the same vmlinuz and initrd an actual hardware box hangs at mounting /. I've tested with break=mount and break=mountroot, and I only get the initramfs prompt with break=mount. The bootlog is here: http://pastebin.com/m2518c13d Any help or pointers would be appreciated. -allan