We're working on an Intel Xeon where Slimbootloader is launching EDK2 which then attempts to launch NetBoot.

We followed the instructions here https://slimbootloader.github.io/how-tos/boot-netboot.html to prepare EDK2, and here https://github.com/tianocore/tianocore.github.io/wiki/Common-instructions to build it.

 

The problem is that EDK2 fails to launch Netboot, here is an extract of the output:
 
.....
[Bds]Booting Netboot (iPXE)
[Bds] Expand FvFile(4CDF2DAE-B4C7-482C-B468-99C812911FF5) -> <null string>
ERROR: C40000002:V03051002 I0 6D33944A-EC75-4855-A54D-809C75241F6C 4ECC518
PROGRESS CODE: V03051001 I0
Memory  Previous  Current    Next
 Type    Pages     Pages     Pages
======  ========  ========  ========
  09    00000019  0000011D  00000164
  0A    00000004  00000000  00000004
  00    00000008  00000000  00000008
  06    00000100  00000050  00000100
  05    00000100  00000036  00000100
Memory Type Information settings change.
.....
[Bds] Unable to boot!
 
Through a series of debug messages I was able to ascertain that the function CoreLocateDevicePath() returns EFI_NOT_FOUND.

 

I've already tried setting NETWORK_DRIVER_ENABLE in UefiPayloadPkg.dsc, this had no effect.

 

Any ideas?

Thanks

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