FB 9.1 boot loader problem in VirtualBox

[jb]

jb <jb.1234abcd <at> gmail.com> writes:

> 
> jb <jb.1234abcd <at> gmail.com> writes:
> 
> > ...
> 
> Next problem:
> the FB 9.1 dmesg differs on:
> - VB VM
> pnp bios: Bad PnP BIOS data checksum
> ...
> orm0: <ISA Option ROM> at iomem 0xc0000-0xc7fff pnpid ORM0000 on isa0

Correction
> - on real hardware
> none of the above
dmesg:
...
isab0: <PCI-ISA bridge> at device 31.0 on pci0
isa0: <ISA bus> on isab0
pmtimer0 on isa0
orm0: <ISA Option ROMs> at iomem 0xc0000-0xcffff,0xe0000-0xeffff pnpid ORM0000
on isa0
sc0: <System console> at flags 0x100 on isa0
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
...

That msg in FB VM:
"pnp bios: Bad PnP BIOS data checksum"
it means what is says - do not trust it; or also do not use PnP ?
But it may also mean a problem accessing it in VM only, as opposed to a real
machine.
Searched Google, it shows often, but no clear interpretation.
jb