Bug#574350: grub-pc: disk device incorrectly detected

[Kenyon Ralph]

Package: grub-pc
Version: 1.98-1
Severity: normal


In my case, on a Dell Latitude 2100, the upgrade to grub-pc 1.98-1
incorrectly detected the boot disk as /dev/sdb instead of the correct
/dev/sda and put /dev/sdb in devices.map. The boot error was the same
as the original reporter. On this machine, sdb is an SD card reader.

The information below is the correct setup, which I got by booting a
grml USB stick, mounting, chrooting, aptitude reinstall grub-pc, and
dpkg-reconfigure grub-pc (I'm not sure that both reinstall and
reconfigure were necessary).

-- Package-specific info:

*********************** BEGIN /proc/mounts
/dev/mapper/copernicus-root / ext4 rw,noatime,errors=remount-ro,barrier=1,data=writeback,noauto_da_alloc 0 0
/dev/sda1 /boot ext4 rw,noatime,barrier=1,data=writeback,noauto_da_alloc 0 0
/dev/mapper/copernicus-home /home ext4 rw,noatime,barrier=1,data=writeback,noauto_da_alloc 0 0
/dev/mapper/copernicus-tmp /tmp ext4 rw,noatime,barrier=1,data=writeback,noauto_da_alloc 0 0
/dev/mapper/copernicus-usr /usr ext4 rw,noatime,barrier=1,data=writeback,noauto_da_alloc 0 0
/dev/mapper/copernicus-var /var ext4 rw,noatime,barrier=1,data=writeback,noauto_da_alloc 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
}
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set 86515ae6-da4c-47b2-bb1b-b65f98e04027
if loadfont /grub/unicode.pf2 ; then
  set gfxmode=1024x576x32
  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='(hd0,1)'
search --no-floppy --fs-uuid --set 86515ae6-da4c-47b2-bb1b-b65f98e04027
set locale_dir=($root)/grub/locale
set lang=en
insmod gettext
set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set 86515ae6-da4c-47b2-bb1b-b65f98e04027
insmod png
if background_image /grub/moreblue-orbit-grub.png ; then
  set color_normal=black/black
  set color_highlight=magenta/black
else
  set menu_color_normal=cyan/blue
  set menu_color_highlight=white/blue
fi
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry "Debian GNU/Linux, with Linux 2.6.32-3-686" --class debian --class gnu-linux --class gnu --class os {
	insmod ext2
	set root='(hd0,1)'
	search --no-floppy --fs-uuid --set 86515ae6-da4c-47b2-bb1b-b65f98e04027
	echo	Loading Linux 2.6.32-3-686 ...
	linux	/vmlinuz-2.6.32-3-686 root=/dev/mapper/copernicus-root ro rootflags=data=writeback 
	echo	Loading initial ramdisk ...
	initrd	/initrd.img-2.6.32-3-686
}
menuentry "Debian GNU/Linux, with Linux 2.6.32-3-686 (recovery mode)" --class debian --class gnu-linux --class gnu --class os {
	insmod ext2
	set root='(hd0,1)'
	search --no-floppy --fs-uuid --set 86515ae6-da4c-47b2-bb1b-b65f98e04027
	echo	Loading Linux 2.6.32-3-686 ...
	linux	/vmlinuz-2.6.32-3-686 root=/dev/mapper/copernicus-root ro single rootflags=data=writeback
	echo	Loading initial ramdisk ...
	initrd	/initrd.img-2.6.32-3-686
}
### 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: i386 (i686)

Kernel: Linux 2.6.32-3-686 (SMP w/2 CPU cores)
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:
ii  desktop-base                  5.0.5      common files for the Debian Deskto

-- debconf information:
  grub2/kfreebsd_cmdline:
* grub2/linux_cmdline: rootflags=data=writeback
  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: