kernel boot failure with ipxe on uefi mode

[robinsmidsrod]

You need to specify the root= kernel argument according to what the initrd expects (or another argument that serves a similar purpose). If you can't find any documentation on kernel arguments in the hp scripting toolkit docs then you need to unpack the initrd and go looking manually for potential boot parameters that its init scripts support. If it is based on Fedora, look for anacode-related docs, if it is based on Debian, look for casper-related docs. For gentoo/arch, I'm unsure.