Bug#575076: grub-update stopped working after upgrade to grub-pc_1.98-1_amd64.deb (md device)

[Ramunas Vabolis]

Package: grub-pc
Version: 1.98-1
Severity: grave
Justification: renders package unusable

After debian squeeze dist-upgrade one of the updated packages was grub:
Preparing to replace grub-pc 1.98~20100115-1 (using .../grub-pc_1.98-1_amd64.deb) ...
Unpacking replacement grub-pc ...

But there is a major failure:
update-grub
Generating grub.cfg ...
/usr/sbin/grub-probe: error: unknown filesystem.

# cat /proc/mounts
rootfs / rootfs rw 0 0
none /sys sysfs rw,nosuid,nodev,noexec,relatime 0 0
none /proc proc rw,nosuid,nodev,noexec,relatime 0 0
udev /dev tmpfs rw,relatime,size=10240k,mode=755 0 0
/dev/md0 / ext3 rw,relatime,errors=remount-ro,data=ordered 0 0
tmpfs /lib/init/rw tmpfs rw,nosuid,relatime,mode=755 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev,relatime 0 0
devpts /dev/pts devpts rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000 0 0
/dev/md1 /var ext3 rw,relatime,errors=continue,data=ordered 0 0



-- Package-specific info:

*********************** BEGIN /proc/mounts
/dev/md0 / ext3 rw,relatime,errors=remount-ro,data=ordered 0 0
/dev/md1 /var ext3 rw,relatime,errors=continue,data=ordered 0 0
*********************** END /proc/mounts

*********************** BEGIN /boot/grub/device.map
(hd0)	/dev/sda
*********************** 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
}
set locale_dir=/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" {
	insmod raid
	insmod mdraid
	set root='(md0)'
	echo	Loading Linux 2.6.32-trunk-amd64 ...
	linux	/boot/vmlinuz-2.6.32-trunk-amd64 root=/dev/md0 ro  quiet
	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)" {
	insmod raid
	insmod mdraid
	set root='(md0)'
	echo	Loading Linux 2.6.32-trunk-amd64 ...
	linux	/boot/vmlinuz-2.6.32-trunk-amd64 root=/dev/md0 ro single 
	echo	Loading initial ramdisk ...
	initrd	/boot/initrd.img-2.6.32-trunk-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.32-3-amd64" {
	insmod raid
	insmod mdraid
	set root='(md0)'
	echo	Loading Linux 2.6.32-3-amd64 ...
	linux	/boot/vmlinuz-2.6.32-3-amd64 root=/dev/md0 ro  quiet
	echo	Loading initial ramdisk ...
	initrd	/boot/initrd.img-2.6.32-3-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.32-3-amd64 (recovery mode)" {
	insmod raid
	insmod mdraid
	set root='(md0)'
	echo	Loading Linux 2.6.32-3-amd64 ...
	linux	/boot/vmlinuz-2.6.32-3-amd64 root=/dev/md0 ro single 
	echo	Loading initial ramdisk ...
	initrd	/boot/initrd.img-2.6.32-3-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 testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-trunk-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.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                   1.98-1     GRand Unified Bootloader, version 
ii  libc6                         2.10.2-6   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:
  grub-pc/kopt_extracted: false
  grub2/kfreebsd_cmdline:
* grub-pc/install_devices: (hd0)
  grub-pc/postrm_purge_boot_grub: false
* grub2/linux_cmdline:
  grub2/kfreebsd_cmdline_default: quiet
* grub2/linux_cmdline_default: quiet
  grub-pc/chainload_from_menu.lst: true