[syslinux] Upgraded to Syslinux 5.00 - Failed to load ldlinux.c32

[Ady]

> 3) Updated extlinux using
> 
>   extlinux --update /boot/extlinux
> 
> (I also tried "extlinux --install")
> 
> 4) Removed everything in /boot/extlinux excluding "extlinux.conf" and
> "ldlinux.sys".
> 
> 5) Copied *.c32 from /ush/share/syslinux to /boot/extlinux:
> 

I don't know if there are additional problems, but the order of those 
steps might be problematic. Your step #4 (which, for 5.00+, should be 
ldlinux.sys, ldlinux.c32 and the relevant config file) should be 
performed before your step #3, so in your step #5 you should NOT be 
replacing files (only re-adding the same files with their new 
versions; not replacing ldlinux.* which were "installed" already).

In other words, when you perform "extlinux --install", 2 files are 
"installed" with Syslinux 5.00: ldlinux.sys AND ldlinux.c32. Then add 
all the lib*.c32 files and all the other relevant *.c32 files you 
were using before, but updated to 5.00.

As said, there may be other issues to consider (raid for example), 
but I would first check this simple change in the order of the steps.

HTH,
Ady.