Bug#520846: In the same boat.

[Alexander Vlasov]

Can't update-grub on sparc because of missing vbe.mod:

/etc/grub.d/00_header:

     # Pick a video backend
     video_backend=
     for i in vbe ; do
       if test -e ${grub_prefix}/$i.mod ; then
         video_backend=$i
         break
       fi
     done
     if ! [ "${video_backend}" ] ; then
       echo "No suitable backend could be found for gfxterm." >&2 ; exit 1
     fi