I can give it a shot in a few days. Loading older pxelinux and pointing
it to current configs seems to resolve the issue.
#!ipxe
dhcp
set 210:string
http://archive.ubuntu.com/ubuntu/dists/utopic/main/installer-i386/current/images/netboot/
# chain ${210:string}pxelinux.0
chain
Public bug reported:
i boot ubuntu installer through iPXE like so :
#!ipxe
dhcp
set 210:string
http://archive.ubuntu.com/ubuntu/dists/utopic/main/installer-amd64/current/images/netboot/
chain ${210:string}pxelinux.0
This worked perfectly with trusty, fails on utopic due to cannot load