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Description of problem:
I'm using pxelinux from syslinux-1.75 to do network installs.  It worked fine
for the old limbo, and for 7.2/3.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.setup dhcp, and tftp to load pxelinux.0  (I can send my config files if need be.)
2.Copy vlminuz, and initrd from images/pxe/ to /tftpboot
3.Setup pxelinux config file
# Redhat Limbo beta 
label limbo
  kernel /vmlinuz.8.0 
  append initrd=initrd.img.8.0 lang= devfs=nomount ramdisk_size=9216

4.Attempt to start limbo installer

Actual Results:  Kernel appears to load, but after a few ".." it hangs.  The
system pxe installed the 1st beta fine.  It pxeboots dos, linux, 7.2, and 7.3
installers just fine.

Additional info:
pxelinux.cfg/default:
PROMPT 1
TIMEOUT 100
DISPLAY msg
default autoburn

# Linux nfs root RH (2.4.18-5-netboot4)
label linux
  kernel /vmlinuz-2.4.18-5-netboot4
  append root=/dev/nfs ip=::::::dhcp nfsroot=10.10.1.3:/vol0/nfs/root/initial co
nsole=ttyS0,9600 console=tty0 

## Autoburn
label autoburn
  kernel  /vmlinuz-2.4.18-5-netboot4 
append  root=/dev/nfs ip=::::::dhcp nfsroot=10.10.1.3:/vol0/nfs/root/initial con
sole=ttyS0,9600 console=tty0 acpismp=force itburns

# Redhat Limbo beta 
label limbo
  kernel /vmlinuz.8.0 
  append initrd=initrd.img.8.0 lang= devfs=nomount ramdisk_size=9216
 

# Redhat 7.3 fullauto /w burnin 
label 73fb
  kernel /vmlinuz.73 
append  initrd=initrd.img.73 lang= devfs=nomount ramdisk_size=8192 vga=788 ks=nf
s:10.10.1.3:/rh73/ks-burn.cfg 

dhcpd.conf:
#pxe grub stuff
#filename                        "/pxegrub";
option option-150               "/grub.cfg";

#nfsroot 
#option root-path                "/vol0/nfs/root/initial,v3";

#pxelinux stuff
filename                        "/pxelinux.0";

#next-server                    10.10.1.3;
#option routers 10.10.1.1;

#needed for other dhcpd server
#ddns-update-style  ad-hoc;
max-lease-time 86400;
default-lease-time 43200;

subnet 10.10.0.0 netmask 255.255.0.0 {
        range 10.10.2.1 10.10.5.254;
        option broadcast-address 10.10.255.255;
}