Bug#586142: grub-pc: Shows Welcome to GRUB and reboots.
Paul Menzel
pm.debian at googlemail.com
Sun Jun 20 22:27:50 UTC 2010
Am Sonntag, den 20.06.2010, 22:41 +0100 schrieb Colin Watson:
> On Sat, Jun 19, 2010 at 11:13:45AM +0200, Paul Menzel wrote:
> > Am Freitag, den 18.06.2010, 13:18 +0100 schrieb Colin Watson:
> > > On Wed, Jun 16, 2010 at 09:16:16PM +0200, Paul Menzel wrote:
> > > > Now the message »Welcome to GRUB!« is shown and the machine reboots
> > > > immediately. I tried to press Shift but could not get into the command
> > > > line.
[…]
> When GRUB boots, its boot sector first loads its "core image", which is
> usually embedded in the gap between the boot sector and the first
> partition on the same disk as the boot sector. This core image then
> figures out where to find /boot/grub, and loads grub.cfg from it as well
> as more GRUB modules.
>
> The thing that tends to go wrong here is that the core image must be
> from the same version of GRUB as any modules it loads. /boot/grub/*.mod
> are updated only by grub-install, so this normally works OK. However,
> for various reasons (deliberate or accidental) some people install GRUB
> to multiple disks. In this case, grub-install might update
> /boot/grub/*.mod along with the core image on one disk, but your BIOS
> might actually be booting from a different disk. The effect of this
> will be that you'll have an old core image and new modules, which will
> probably blow up in any number of possible ways.
>
> (Quite often, this problem lies dormant for a while because GRUB happens
> not to change in a way that causes incompatibility between the core
> image and modules. There was such a change on 2010-06-10 upstream,
> though, and so suddenly lots of people had serious problems brought to
> their attention all in one go. It's not really the fault of any recent
> change, but rather an ongoing problem.)
>
> There are a few things that strike me as suspicious about your setup.
> Firstly, you have /boot on /dev/md0, which is presumably a RAID device
> assembled from partitions on multiple disks, yet there's only one device
> in /boot/grub/device.map according to your original report. Then, in
> your most recent message to this bug, you seem to have edited
> /boot/grub/device.map to include both /dev/hda and /dev/sda, which seems
> a little surprising. What disks do you really have in your system?
>
> Your original report says "debconf information excluded", which is a
> shame since there's a vital piece of information there. What does
> 'debconf-show grub-pc | grep install_devices' say?
I am sorry. I could not boot the system/access the Ext4 partition back
then (remember the PS in my second message). So I used reportbug on a
different system and thought excluding debconf information would exclude
all system specific information and I did not bother to check when I
composed the message. :(
I am including the reportbug information in this message now. I am sorry
for the inconvenience.
Thank you for your help!
Paul
-- Package-specific info:
*********************** BEGIN /proc/mounts
/dev/disk/by-uuid/582643ad-cb1e-4a01-bca4-5c8ad8562447 / ext4 rw,relatime,errors=remount-ro,barrier=1,data=ordered 0 0
*********************** END /proc/mounts
*********************** BEGIN /boot/grub/device.map
(hd0) /dev/hda
(hd1) /dev/sda
*********************** END /boot/grub/device.map
*********************** BEGIN /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by 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
}
if terminal_input console ; then true ; else
# For backward compatibility with versions of terminal.mod that don't
# understand terminal_input
terminal console
fi
if terminal_output console ; then true ; else
# For backward compatibility with versions of terminal.mod that don't
# understand terminal_output
terminal console
fi
set timeout=1
### 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 2.6.32-5-686' --class debian --class gnu-linux --class gnu --class os {
insmod part_msdos
insmod ext2
set root='(hd1,msdos1)'
search --no-floppy --fs-uuid --set 582643ad-cb1e-4a01-bca4-5c8ad8562447
echo 'Loading Linux 2.6.32-5-686 ...'
linux /boot/vmlinuz-2.6.32-5-686 root=UUID=582643ad-cb1e-4a01-bca4-5c8ad8562447 ro parport=0 init=/sbin/bootchartd quiet
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.32-5-686
}
menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-686 (recovery mode)' --class debian --class gnu-linux --class gnu --class os {
insmod part_msdos
insmod ext2
set root='(hd1,msdos1)'
search --no-floppy --fs-uuid --set 582643ad-cb1e-4a01-bca4-5c8ad8562447
echo 'Loading Linux 2.6.32-5-686 ...'
linux /boot/vmlinuz-2.6.32-5-686 root=UUID=582643ad-cb1e-4a01-bca4-5c8ad8562447 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.32-5-686
}
### 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 ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
*********************** END /boot/grub/grub.cfg
-- System Information:
Debian Release: squeeze/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.32-5-686 (SMP w/1 CPU core)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash
Versions of packages grub-pc depends on:
ii debconf [debconf-2.0] 1.5.32 Debian configuration management sy
ii grub-common 1.98+20100617-1 GRand Unified Bootloader, version
ii libc6 2.11.2-1 Embedded GNU C Library: Shared lib
ii libdevmapper1.02.1 2:1.02.48-2 The Linux Kernel Device Mapper use
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:
grub-pc/kopt_extracted: false
grub2/kfreebsd_cmdline:
* grub-pc/install_devices: (hd0)
grub-pc/postrm_purge_boot_grub: false
* grub2/linux_cmdline:
grub-pc/install_devices_empty: false
grub2/kfreebsd_cmdline_default: quiet
* grub2/linux_cmdline_default: parport=0 init=/sbin/bootchartd quiet
grub-pc/chainload_from_menu.lst: true
grub-pc/mixed_legacy_and_grub2: true
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