snponly.efi hang on on ipxe initialising devices...

[NiKiZe]

10ec:8168, the rtl816x is buggy on so many levels, and not surprised it fails.

I think there is several posts about them, both on the forum and mailing list.
for testing purposes, give latest git master a try with ipxe.efi instead, and see if that works.
It might be that the firmware provided driver has issues, it might be a "bad chip" (as in with some bugs, with no handling in current iPXE)