After a little more research, I’ve been able to determine one possibility. Could it maybe be a host boot kernel issue? I’m apparently running kernel 4.19.0-11, but that kernel isn’t even listed when I go into Kernel Update in FOG. Would it be worth upgrading the kernel? I don’t want to make it stop booting my gaming rig.
This is a bit deceiving here (not your post but how FOG boots). The iPXE menu is driven by the ipxe boot loader (undionly.kpxe or ipxe.efi). Once you make a menu selection then FOS Linux (a.k.a the kernel) / bzImage init.xz is transferred to the target computer and FOS Linux boots. This is the engine that clones disk images.
So if your system is hanging before the iPXE menu then its a iPXE issues, if it hags after a menu selection then it is probably FOS Linux.
The version of “the kernel” is not related to the kernel version on the host computer that FOG is installed on. It refers to the version of the kernel that powers FOS Linux. I can tell you that you will want to upgrade to 5.6.18 of the fos linux kernel if you want to support 2020 or later hardware. You can do that through the webui FOG Configuration -> Kernel section.