Loading mixed compression initrds fails

[NiKiZe]

(2019-08-26 07:19)alkisg Wrote:  I think that ipxe doesn't properly align the initrds into 4-byte boundaries or something, as if one tries to load two initrds of different compressions, it fails and the kernel reports "decompression error", while it works with grub.

My guess for this is that ... grub does decompression of initrd files - while iPXE does not.
iPXE expects the kernel to deal with the decompression - so if you have a kernel that supports some, but not other decompression methods you would get this result.