Comment 4 for bug 1385069

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 http://archive.ubuntu.com/ubuntu/dists/trusty/main/installer-i386/current/images/netboot/pxelinux.0

The vesamenu.c32 cannot be loaded due to incompatibility, so there is only text-mode menu prompt from pxelinux. But system is installable this way.