Bug#530927: grub2: System unbootable after upgrade

[Gerrit Jan Baarda]

Package: grub2
Version: 1.96+20090523-1
Severity: important

After upgrading from grub2_1.96+20090317-1 to 1.96+20090523-1 my system became unbootable. 

The upgrade changed the following lines in the auto generated grub.cfg:

45c45
<       linux   /boot/vmlinuz-2.6.29-2-686 root=UUID=646c28d7-e9d1-45a5-bd1f-efa24c94f844 ro quiet
---
>       linux   /boot/vmlinuz-2.6.29-2-686 root=/dev/mapper/linux-root ro quiet
52c52
<       linux   /boot/vmlinuz-2.6.29-2-686 root=UUID=646c28d7-e9d1-45a5-bd1f-efa24c94f844 ro single quiet
---
>       linux   /boot/vmlinuz-2.6.29-2-686 root=/dev/mapper/linux-root ro single quiet

I could boot again after manually changing the root=UUID=.... lines back to root=/dev/mapper/linux-root.

Yours,
Gerrit Jan. 

-- Package-specific info:

*********************** BEGIN /proc/mounts
/dev/mapper/linux-root / ext3 rw,noatime,errors=remount-ro,data=ordered 0 0
/dev/mapper/linux-home /home ext3 rw,noatime,errors=continue,data=ordered 0 0
/dev/mapper/linux-var /var ext3 rw,noatime,errors=continue,data=ordered 0 0
/dev/sda1 /media/drive-c fuseblk rw,user_id=0,group_id=0,allow_other,blksize=4096 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  and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
set default=0
set timeout=5
insmod lvm
set root=(linux-root)
search --fs-uuid --set 646c28d7-e9d1-45a5-bd1f-efa24c94f844
if loadfont /usr/share/grub/ascii.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
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
insmod lvm
set root=(linux-root)
search --fs-uuid --set 646c28d7-e9d1-45a5-bd1f-efa24c94f844
insmod png
if background_image /boot/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, linux 2.6.29-2-686" {
	insmod lvm
	set root=(linux-root)
	search --fs-uuid --set 646c28d7-e9d1-45a5-bd1f-efa24c94f844
	linux	/boot/vmlinuz-2.6.29-2-686 root=UUID=646c28d7-e9d1-45a5-bd1f-efa24c94f844 ro quiet 
	initrd	/boot/initrd.img-2.6.29-2-686
}
menuentry "Debian GNU/Linux, linux 2.6.29-2-686 (recovery mode)" {
	insmod lvm
	set root=(linux-root)
	search --fs-uuid --set 646c28d7-e9d1-45a5-bd1f-efa24c94f844
	linux	/boot/vmlinuz-2.6.29-2-686 root=UUID=646c28d7-e9d1-45a5-bd1f-efa24c94f844 ro single quiet
	initrd	/boot/initrd.img-2.6.29-2-686
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Microsoft Windows XP Home Edition (on /dev/sda1)" {
	set root=(hd0,1)
	chainloader +1
}
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file is an example on how to add custom entries
### END /etc/grub.d/40_custom ###
*********************** END /boot/grub/grub.cfg

-- System Information:
Debian Release: squeeze/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.29-2-686 (SMP w/1 CPU core)
Locale: LANG=nl_NL.UTF-8, LC_CTYPE=nl_NL.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages grub2 depends on:
ii  grub-pc                  1.96+20090523-1 GRand Unified Bootloader, version 

grub2 recommends no packages.

grub2 suggests no packages.

-- debconf information:
  grub2/numbering_scheme_transition: