Bug#568777: grub-pc: Fails to install

[Lisandro Damián Nicanor Pérez Meyer]

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

I full upgraded my machine and:

/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 ...
Found linux image: /boot/vmlinuz-2.6.32-trunk-amd64
Found initrd image: /boot/initrd.img-2.6.32-trunk-amd64
/usr/sbin/grub-probe: error: unknown filesystem.
/usr/sbin/grub-probe: error: unknown filesystem.
Found linux image: /boot/vmlinuz-2.6.31-1-amd64
Found initrd image: /boot/initrd.img-2.6.31-1-amd64
/usr/sbin/grub-probe: error: unknown filesystem.
/usr/sbin/grub-probe: error: unknown filesystem.
done

Then, if I reboot, Grub does not boots (it does not even show the images selection menu). It complains about a missing variable.

I can work around this loading the debian installer in rescue mode and then downgrading to grub-pc_1.98~20100115-1.

The interesting thing about this issue is that I can only reproduce it on my laptop, a Dell Latitude e5500. I have upgraded the package in several more machines without problems.

Please do not heasitate to contact me if I can be of any further help.

Regards, Lisandro.

-- Package-specific info:

*********************** BEGIN /proc/mounts
/dev/disk/by-uuid/a6a18026-eaa5-4b08-ba2b-ea3b2e3e4438 / ext3 rw,relatime,errors=remount-ro,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 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

	echo	Loading Linux 2.6.32-trunk-amd64 ...
	linux	/boot/vmlinuz-2.6.32-trunk-amd64 root=/dev/sda2 ro  quiet gfxpayload=1024x768x32
	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

	echo	Loading Linux 2.6.32-trunk-amd64 ...
	linux	/boot/vmlinuz-2.6.32-trunk-amd64 root=/dev/sda2 ro single 
	echo	Loading initial ramdisk ...
	initrd	/boot/initrd.img-2.6.32-trunk-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.31-1-amd64" {
	set gfxpayload=keep

	echo	Loading Linux 2.6.31-1-amd64 ...
	linux	/boot/vmlinuz-2.6.31-1-amd64 root=/dev/sda2 ro  quiet gfxpayload=1024x768x32
	echo	Loading initial ramdisk ...
	initrd	/boot/initrd.img-2.6.31-1-amd64
}
menuentry "Debian GNU/Linux, with Linux 2.6.31-1-amd64 (recovery mode)" {
	set gfxpayload=keep

	echo	Loading Linux 2.6.31-1-amd64 ...
	linux	/boot/vmlinuz-2.6.31-1-amd64 root=/dev/sda2 ro single 
	echo	Loading initial ramdisk ...
	initrd	/boot/initrd.img-2.6.31-1-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: (990, 'unstable'), (500, 'testing'), (101, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-trunk-amd64 (SMP w/2 CPU cores)
Locale: LANG=es_AR.UTF-8, LC_CTYPE=es_AR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

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: false
* grub-pc/install_devices: /dev/sda
  grub-pc/postrm_purge_boot_grub: false
  grub2/kfreebsd_cmdline_default: quiet
* grub2/linux_cmdline_default: quiet gfxpayload=1024x768x32