Bug#566735: grub-pc: data point +1

[Arno Schuring]

With set debug=all I do get an error message:

> Dropping to grub command line (lsmod confirmed that lvm was already
> loaded, but I was hoping for an error message):
> grub> insmod lvm
> grub> ls
disk/i386/pc/biosdisk.c: 298: Read error when probing drive 0x82

But this error occurs when reading the MBR (according to the source),
and both partition tables have been read correctly. So why the error?