[syslinux] syslinux 4.02 hangs at "boot:"

[Alex Zeffertt]

Hi all, 

I have a machine that won't boot syslinux 4.02 but will boot syslinux
3.53.  We've installed syslinux 4.02 on a number of machines but only
this one has a problem.

The problem is that the machine hangs entirely after printing "boot:" on
the tty.  The stanza being booted in /boot/extlinux.conf is:

 label xe
  # XenServer
  kernel mboot.c32
  append /boot/xen.gz dom0_mem=752M lowmem_emergency_pool=1M
crashkernel=64M at 32M console= vga=mode-0x0311 --- /boot/vmlinuz-2.6-xen
root=LABEL=root-ldndebvr ro xencons=hvc console=hvc0 console=tty0 quiet
vga=785 splash --- /boot/initrd-2.6-xen.img

and all the files in /boot definitely exist because the installation was
done exactly the same way as on the machines that worked.

The machine itself has the following features:

 CPU: Socket count: 2
 CPU: Core count: 4
 CPU: Logical CPU count: 4
 CPU: Vendor: AuthenticAMD
 CPU: Speed: 2593.512MHz
 CPU: Model name: Dual-Core AMD Opteron(tm) Processor 2218
 CPU: Family - 15, Model - 65, Stepping - 2
 CPU: Flags: fpu de tsc msr pae mce cx8 apic mtrr mca cmov pat clflush
mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt 3dnowext 3dnow pni
hypervisor cmp_legacy svm extapic cr8_legacy
 CPU: Features: 00002001-178bfbff-0000001f-ebd3fbff
 CPU: Features Maskable: no
 Memory: 4G
 Disks: 1
 Disk 1: 120G
 NICs: 3
 NIC 1: 00:04.0 Ethernet controller: Intel Corporation 82557/8/9/0/1
Ethernet Pro 100 (rev 10)
 NIC 2: 04:04.0 Ethernet controller: Broadcom Corporation NetXtreme
BCM5780 Gigabit Ethernet (rev 03)
 NIC 3: 04:04.1 Ethernet controller: Broadcom Corporation NetXtreme
BCM5780 Gigabit Ethernet (rev 03)
 NICs on NPRI: 1
 Resource string:
memory=4G/sockets=2/cores=4/cpus=4/disks=1/disk1=120G/NPRI=1


Does anybody have any ideas what could be causing this problem?  If so
I'd really appreciate hearing them.

Regards,

Alex