Bug#463081: grub2: Machine reboots after 'Welcome to GRUB!' message

[Peter Hicks]

Package: grub2
Version: 1.95+20080128-1
Severity: critical
Justification: breaks the whole system

After upgrading this morning, my laptop (Dell Latitude D820) rebooted
immediately after "Welcome to GRUB!" appeared.  The BIOS went through a
'slow' boot, indicative that the last reboot was unexpected.

I've filed this bug early to prevent other people being caught out with an
unbootable system.

-- Package-specific info:

*********************** BEGIN /proc/mounts
rootfs / rootfs rw 0 0
none /sys sysfs rw,nosuid,nodev,noexec 0 0
none /proc proc rw,nosuid,nodev,noexec 0 0
udev /dev tmpfs rw 0 0
/dev/sda2 / ext3 rw,noatime,errors=remount-ro,data=ordered 0 0
/dev/sda2 /dev/.static/dev ext3 rw,errors=remount-ro,data=ordered 0 0
tmpfs /lib/init/rw tmpfs rw,nosuid 0 0
usbfs /proc/bus/usb usbfs rw,nosuid,nodev,noexec 0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev 0 0
devpts /dev/pts devpts rw,nosuid,noexec 0 0
/dev/sda7 /home xfs rw,noatime,ikeep,noquota 0 0
/dev/sda5 /usr xfs rw,noatime,ikeep,noquota 0 0
/dev/sda6 /var xfs rw,noatime,ikeep,noquota 0 0
/tmp /tmp tmpfs rw 0 0
/proc/sys/fs/binfmt_misc /proc/sys/fs/binfmt_misc binfmt_misc rw 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/update-grub using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
set default=0
set timeout=5
set root=(hd0,2)
font (hd0,5)/share/grub/unicode.pff
set gfxmode=640x480
insmod gfxterm
insmod vbe
terminal gfxterm
### 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_hurd ###
### END /etc/grub.d/10_hurd ###

### BEGIN /etc/grub.d/10_linux ###
menuentry "Debian GNU/Linux, linux 2.6.24-neasden-poggs" {
	linux	(hd0,2)/boot/vmlinuz-2.6.24-neasden-poggs root=/dev/sda2 ro vga=791 splash
	initrd	(hd0,2)/boot/initrd.img-2.6.24-neasden-poggs
}
menuentry "Debian GNU/Linux, linux 2.6.24-neasden-poggs (single-user mode)" {
	linux	(hd0,2)/boot/vmlinuz-2.6.24-neasden-poggs root=/dev/sda2 ro single vga=791 splash
	initrd	(hd0,2)/boot/initrd.img-2.6.24-neasden-poggs
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/15_windows ###
menuentry "Windows XP Professional" {
	set root=(hd0,1)
	chainloader +1
}
### END /etc/grub.d/15_windows ###

### BEGIN /etc/grub.d/20_memtest86 ###
menuentry "Memory test (memtest86)" {
	linux	(hd0,2)/boot/memtest86.bin
}
### END /etc/grub.d/20_memtest86 ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
	linux	(hd0,2)/boot/memtest86+.bin
}
### END /etc/grub.d/20_memtest86+ ###
*********************** END /boot/grub/grub.cfg

-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.24-neasden-poggs (SMP w/2 CPU cores; PREEMPT)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages grub2 depends on:
ii  debconf                  1.5.18          Debian configuration management sy
ii  grub-pc                  1.95+20080128-1 GRand Unified Bootloader, version 

grub2 recommends no packages.

-- debconf information:
  grub2/numbering_scheme_transition: