Bug#567437: grub-pc: Grub Fails to upgrade properly to the latest version it comes up with "Unknown Filesystem"

[LawBayly]

Package: grub-pc
Version: 1.98~20100128-1
Severity: important


Grub Fails to upgrade properly with errors coming up mentioning "Unknown Filesystem" , apt-get upgrade process is shown below:

apt-get upgrade                            
Reading package lists... Done                                              
Building dependency tree                                                   
Reading state information... Done
The following packages have been kept back:
  kdenetwork kopete libjpeg-progs python-sip4 xz-utils
0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.
1 not fully installed or removed.
After this operation, 0B of additional disk space will be used.
Do you want to continue [Y/n]? y
Setting up grub-pc (1.98~20100128-1) ...
/usr/sbin/grub-probe: error: unknown filesystem.
Auto-detection of a filesystem module failed.
Please specify the module with the option `--modules' explicitly.
Generating grub.cfg ...
/usr/sbin/grub-probe: error: unknown filesystem.
dpkg: error processing grub-pc (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 grub-pc
E: Sub-process /usr/bin/dpkg returned an error code (1)


-- Package-specific info:

*********************** BEGIN /proc/mounts
/dev/disk/by-uuid/e9e52dee-aeb9-46bd-9947-d6ff11e656fc / ext3 rw,relatime,errors=remount-ro,data=ordered 0 0
/dev/sda4 /home ext3 rw,relatime,errors=continue,data=ordered 0 0
/dev/sda1 /mnt/sda1 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096 0 0
/dev/sdb1 /mnt/sdb1 fuseblk rw,relatime,user_id=0,group_id=0,allow_other,blksize=4096 0 0
/dev/sdb2 /extra ext3 rw,relatime,errors=continue,data=ordered 0 0
*********************** END /proc/mounts

*********************** BEGIN /boot/grub/device.map
(hd0)	/dev/sda
(hd1)	/dev/sdb
*********************** END /boot/grub/device.map

*********************** BEGIN /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
  load_env
fi
set default="0"
if [ ${prev_saved_entry} ]; then
  set saved_entry=${prev_saved_entry}
  save_env saved_entry
  set prev_saved_entry=
  save_env prev_saved_entry
  set boot_once=true
fi

function savedefault {
  if [ -z ${boot_once} ]; then
    saved_entry=${chosen}
    save_env saved_entry
  fi
}
insmod ext2
set root=(hd0,3)
search --no-floppy --fs-uuid --set e9e52dee-aeb9-46bd-9947-d6ff11e656fc
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=640x480
  insmod gfxterm
  insmod vbe
  if terminal_output gfxterm ; then true ; else
    # For backward compatibility with versions of terminal.mod that don't
    # understand terminal_output
    terminal gfxterm
  fi
fi
insmod ext2
set root=(hd0,3)
search --no-floppy --fs-uuid --set e9e52dee-aeb9-46bd-9947-d6ff11e656fc
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry "Debian GNU/Linux, with Linux 2.6.32-trunk-amd64" {
	set gfxpayload=keep
	insmod ext2
	set root=(hd0,3)
	search --no-floppy --fs-uuid --set e9e52dee-aeb9-46bd-9947-d6ff11e656fc
	echo	Loading Linux 2.6.32-trunk-amd64 ...
	linux	/boot/vmlinuz-2.6.32-trunk-amd64 root=UUID=e9e52dee-aeb9-46bd-9947-d6ff11e656fc ro  
	echo	Loading initial ramdisk ...
	initrd	/boot/initrd.img-2.6.32-trunk-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.32-trunk-amd64 (recovery mode)" {
	set gfxpayload=keep
	insmod ext2
	set root=(hd0,3)
	search --no-floppy --fs-uuid --set e9e52dee-aeb9-46bd-9947-d6ff11e656fc
	echo	Loading Linux 2.6.32-trunk-amd64 ...
	linux	/boot/vmlinuz-2.6.32-trunk-amd64 root=UUID=e9e52dee-aeb9-46bd-9947-d6ff11e656fc ro single 
	echo	Loading initial ramdisk ...
	initrd	/boot/initrd.img-2.6.32-trunk-amd64
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries.  Simply type the
# menu entries you want to add after this comment.  Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
*********************** END /boot/grub/grub.cfg

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-trunk-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages grub-pc depends on:
ii  debconf [debconf-2.0]    1.5.28          Debian configuration management sy
ii  grub-common              1.98~20100128-1 GRand Unified Bootloader, version 
ii  libc6                    2.10.2-5        Embedded GNU C Library: Shared lib
ii  ucf                      3.0025          Update Configuration File: preserv

grub-pc recommends no packages.

Versions of packages grub-pc suggests:
pn  desktop-base                  <none>     (no description available)

-- debconf information:
  grub2/kfreebsd_cmdline:
* grub2/linux_cmdline:
* grub-pc/chainload_from_menu.lst: true
  grub-pc/kopt_extracted: true
  grub-pc/postrm_purge_boot_grub: false
  grub2/kfreebsd_cmdline_default: quiet
* grub2/linux_cmdline_default:
* grub-pc/install_devices: /dev/sda