Description of problem:
Using pxelinux.0 and vesamenu.c32 for booting some network client via PXE does not work : it hangs displaying
TFTP prefix: /
Trying to load: pxelinux.cfg/default                      ok


Here is a simple "default" file that used to work :
(this "default" file is taken from syslinux's wiki)
======================================
default bin/vesamenu.c32

prompt 0
menu title My Distro Installer

timeout 600
f1 help.txt
f2 version.txt

label bls
  menu label Normal install
  menu default
  kernel vmlinuz
  append initrd=cpio.gz rdinit=/init

label bad
  menu label Bad hardware install
  kernel vmlinuz
  append initrd=cpio2.gz badhardware rdinit=/init

MENU WIDTH 80
MENU MARGIN 10
MENU ROWS 12
MENU TABMSGROW 18
MENU CMDLINEROW 12
MENU ENDROW 24
MENU TIMEOUTROW 20
======================================

The menu correctly shows on PXE clients using "pxelinux.0" and "vesamenu.c32" from syslinux-3.82-2mdv2010.0 (MDV2010.0 RPM).


But using "pxelinux.0" and "vesamenu.c32" from syslinux-4.04-5.mga3, no menu shows up : it just hangs as stated above.

Here is what I can tell for sure :
1- tftpd shows that the clients are asking AND downloading pxelinux.cfg/default (hence the "ok" at the end of the line on the client's screen)
2- on the client, the "default" file is read,
3- the vesamenu.c32 gets requested AND downloaded by the client
4- then nothing else happens

I know that point 2- is done (the "default" file is read) because if I comment out the line "default bin/vesamenu.c32" then vesamenu.c32 does not get requested nor downloaded and an error is displayed on the client's screen:
No DEFAULT or UI configuration directive found!
boot:


If I change the line "prompt 0" to "prompt 1" then "boot:" gets displayed and I can enter text.


This is happening for pxelinux.0, gpxelinux.0 and gpxelinuxk.0.



Version-Release number of selected component (if applicable):
syslinux-4.04-5.mga3

How reproducible:
always



Steps to Reproduce:
1. set up a server with PXE capabilities (dhcp with options :next-server ip.ip.ip.ip; filename "/pxelinux.0";) and tftpd

2. install syslinux-4.04-5.mga3

3. cp /usr/lib/syslinux/pxelinux.0 /var/lib/tftpboot/pxelinux.0
cp /usr/lib/syslinux/vesamenu.c32 /var/lib/tftpboot/bin/

4. then try to boot a PXE client

5. the client hangs just after downloading vesamenu.c32 stating :
TFTP prefix: /
Trying to load: pxelinux.cfg/default                      ok



I know there have been some changes to syslinux but I couldn't find a bug report or anything about problems with vesamenu.c32 in syslinux 4.04.

syslinux 4.04 was released 2011-04-18.
syslinux 4.06 was released 2012-10-23.
syslinux 6.00 was released 2013-06-20.

I couldn't build it myself (build errors).
Maybe someone can give it a try ?


Regards,
Daggett

Reproducible: 

Steps to Reproduce: