[syslinux] hanging localboot

[Jim Cromie]

Ive got a soekris 4801 on which Ive used pxelinux...
its bios is set to go to pxeboot 1st, then localboot.

Ive got:

    label bootlocal
      MENU label ^9 Boot Local
      localboot 0
      # timeout 80
      # TOTALTIMEOUT 9000

but using hangs:

Booting from local disk...
PXE-M0F: Exiting MacPhyter PXE ROM.

then nothing.

the same compact flash image works fine when boot order is 80 1st,
or when ethernet cable is unplugged and so pxeboot firmware falls back to 80

reboot.c32 reboots successfully.
Ive also tried localboot X, where X>0, no diff (I didnt think it would
help, but..)

In the past, I found that certain reboots (ie shutdown -r now, from
running linux)
would also hang, cuz the ethernet card stayed up on shutdown,
eth0: remaining active for wake-on-lan

and reboot wouldnt clean that up.  Those particular problems were solved by
installing ethtool and disabling WOL in a shutdown script.

Id like a fix that works without reliance on a proper shutdown of a
properly booted kernel.

this is on 4.05-pre1