[gPXE] hang after "gPXE (PCI 08:00.0) Starting execution".

[Stefan Hajnoczi]

You may be interested in this thread:

http://www.mail-archive.com/gpxe@etherboot.org/msg00426.html

It is possible to remove unused features when building the gPXE ROM.
If you need only iSCSI candidates for removal are: COMBOOT, all image
formats (except maybe IMAGE_SCRIPT), PXE stack and UNDI, HTTP and
TFTP.  You'd be left with a gPXE ROM capable of booting from iSCSI
with configuration information sent over DHCP.

Stefan