[syslinux] EFI boot failure

[Keith Grider]

I am back at this, again, trying to get my linux PXE server back up and
running. I have the x86_pc (pxelinux.0) boots fine. I can boot Ubuntu Gnome
16.04 to teh setup screen. Every time I attempt to boot the same nfs from a
computer which can boot via efi (x64_efi), I get a failed transfer. This is
with 6.04_pre I grabbed well over a year ago.

What happens is I get a TFT transport error. This is the log from the nas
which is serving the tftp server. When I tried this, previously, I got the
same error.

May  8 21:44:40 NAS tftpd[88431]: Got ERROR packet: User aborted the
transfer
May  8 21:45:43 NAS tftpd[88559]: Got ERROR packet: User aborted the
transfer
May  8 21:45:48 NAS tftpd[88561]: Timeout #0 on ACK 37
May  8 21:45:53 NAS tftpd[88561]: Timeout #1 on ACK 37
May  8 21:45:58 NAS tftpd[88561]: Timeout #2 on ACK 37
May  8 21:46:03 NAS tftpd[88561]: Timeout #3 on ACK 37
May  8 21:46:08 NAS tftpd[88561]: Timeout #4 on ACK 37
May  8 21:46:13 NAS tftpd[88561]: Timeout #5 send ACK 37 giving up

Can I get a bit of assistance to get this resolved?

My directory ls is this:
/pxe/x64_efi # ls -al
total 1115
drwxrwxrwx   6 kgrider  wheel      14 May  9 09:11 .
drwxrwxrwx   8 root     wheel       8 May  8 20:51 ..
drwxr-xr-x  11 root     wheel      14 May  8 21:22 gubuntu_16_04_1
-rwxrwxrwx   1 kgrider  wheel  139616 Feb 19  2017 ldlinux.e64
-rwxrwxrwx   1 kgrider  wheel  201336 Feb 19  2017 libcom32.c32
-rwxrwxrwx   1 kgrider  wheel   27304 Feb 19  2017 libmenu.c32
-rwxrwxrwx   1 kgrider  wheel   24464 Feb 19  2017 libutil.c32
-rwxrwxrwx   1 kgrider  wheel   32064 Feb 19  2017 menu.c32
drwxrwxrwx   2 kgrider  wheel       5 May  8 21:23 pxelinux.cfg
-rwxrwxrwx   1 kgrider  wheel  126743 Feb 18  2017 splash.png
-rwxrwxrwx   1 kgrider  wheel  200992 Feb 19  2017 syslinux.efi
-rwxrwxrwx   1 kgrider  wheel   32776 Feb 19  2017 vesamenu.c32


This is the entry I am trying to boot:

  kernel gubuntu_16_04_1/casper/vmlinuz.efi
  append initrd=gubuntu_16_04_1/casper/initrd.lz
file=gubuntu_16_04_1/preseed/ubuntu-gnome.seed boot=casper vga=1
netboot=nfs nfsroot=192.168.2.198:/mnt/first_NAS/pxe/x64_efi/gubuntu_16_04_1
nosplash nomodeset --

Regards,

Keith