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View Full Version : [ubuntu] Ext4 + kernel 2.6.28-14 = grub fail



andreselsuave
August 12th, 2009, 01:11 PM
Hi there!

That's the thing:

Imade a clean install of ubuntu 9.04 and chose to use ext4. Now I get a message when I try to boot the 2.6.28-14 kernel. 2.6.28-11 works fine. Tried to reinstall grub from a live cd but doesn't work either. Anyone knows how to fix this or alternatively skip this kernel update ?

thanks a lot

Aubergines
August 12th, 2009, 02:03 PM
The exact error message would be handy :D

andreselsuave
August 12th, 2009, 02:13 PM
The exact error reads:


[2.068294] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

regala
August 12th, 2009, 02:22 PM
The exact error reads:


[2.068294] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)

Hum, the associated initramfs seems screwed: no modules for your disk controler has been insmoded (whether filesystems modules are present in the initramfs, remains another question :-) )
Can you post here the content of your /boot/grub/menu.lst ?

br, mathieu

andreselsuave
August 12th, 2009, 02:37 PM
Edited: By the way, the kernel 2.6.28-11 boots with no problems....


# menu.lst - See: grub(8), info grub, update-grub(8)
# grub-install(8), grub-floppy(8),
# grub-md5-crypt, /usr/share/doc/grub
# and /usr/share/doc/grub-doc/.

## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.
# WARNING: If you are using dmraid do not use 'savedefault' or your
# array will desync and will not let you boot your system.
default 0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout 10

## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
#hiddenmenu

# Pretty colours
#color cyan/blue white/blue

## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line) and entries protected by the
# command 'lock'
# e.g. password topsecret
# password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret

#
# examples
#
# title Windows 95/98/NT/2000
# root (hd0,0)
# makeactive
# chainloader +1
#
# title Linux
# root (hd0,1)
# kernel /vmlinuz root=/dev/hda2 ro
#

#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default options below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specific kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
## kopt_2_6_8=root=/dev/hdc1 ro
## kopt_2_6_8_2_686=root=/dev/hdc2 ro
# kopt=root=UUID=91d6b191-2cc9-4b6a-a1df-6323db1a4ede ro

## default grub root device
## e.g. groot=(hd0,0)
# groot=91d6b191-2cc9-4b6a-a1df-6323db1a4ede

## should update-grub create alternative automagic boot options
## e.g. alternative=true
## alternative=false
# alternative=true

## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
## lockalternative=false
# lockalternative=false

## additional options to use with the default boot option, but not with the
## alternatives
## e.g. defoptions=vga=791 resume=/dev/hda5
# defoptions=quiet splash

## should update-grub lock old automagic boot options
## e.g. lockold=false
## lockold=true
# lockold=false

## Xen hypervisor options to use with the default Xen boot option
# xenhopt=

## Xen Linux kernel options to use with the default Xen boot option
# xenkopt=console=tty0

## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
## altoptions=(recovery) single
# altoptions=(recovery mode) single

## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
## howmany=7
# howmany=all

## specify if running in Xen domU or have grub detect automatically
## update-grub will ignore non-xen kernels when running in domU and vice versa
## e.g. indomU=detect
## indomU=true
## indomU=false
# indomU=detect

## should update-grub create memtest86 boot option
## e.g. memtest86=true
## memtest86=false
# memtest86=true

## should update-grub adjust the value of the default booted system
## can be true or false
# updatedefaultentry=false

## should update-grub add savedefault to the default options
## can be true or false
# savedefault=false

## ## End Default Options ##

title Ubuntu 9.04, kernel 2.6.28-14-generic
uuid 91d6b191-2cc9-4b6a-a1df-6323db1a4ede
kernel /boot/vmlinuz-2.6.28-14-generic root=UUID=91d6b191-2cc9-4b6a-a1df-6323db1a4ede ro quiet splash
initrd /boot/initrd.img-2.6.28-14-generic
quiet

title Ubuntu 9.04, kernel 2.6.28-14-generic (recovery mode)
uuid 91d6b191-2cc9-4b6a-a1df-6323db1a4ede
kernel /boot/vmlinuz-2.6.28-14-generic root=UUID=91d6b191-2cc9-4b6a-a1df-6323db1a4ede ro single
initrd /boot/initrd.img-2.6.28-14-generic

title Ubuntu 9.04, kernel 2.6.28-11-generic
uuid 91d6b191-2cc9-4b6a-a1df-6323db1a4ede
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=91d6b191-2cc9-4b6a-a1df-6323db1a4ede ro quiet splash
initrd /boot/initrd.img-2.6.28-11-generic
quiet

title Ubuntu 9.04, kernel 2.6.28-11-generic (recovery mode)
uuid 91d6b191-2cc9-4b6a-a1df-6323db1a4ede
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=91d6b191-2cc9-4b6a-a1df-6323db1a4ede ro single
initrd /boot/initrd.img-2.6.28-11-generic

title Ubuntu 9.04, memtest86+
uuid 91d6b191-2cc9-4b6a-a1df-6323db1a4ede
kernel /boot/memtest86+.bin
quiet

### END DEBIAN AUTOMAGIC KERNELS LIST

# This is a divider, added to separate the menu items below from the Debian
# ones.
title Other operating systems:
root


# This entry automatically added by the Debian installer for a non-linux OS
# on /dev/sda1
title Microsoft Windows XP Professional
rootnoverify (hd0,0)
savedefault
chainloader +1

regala
August 13th, 2009, 01:54 PM
Edited: By the way, the kernel 2.6.28-11 boots with no problems....


# menu.lst - See: grub(8), info grub, update-grub(8)
# grub-install(8), grub-floppy(8),
# grub-md5-crypt, /usr/share/doc/grub
# and /usr/share/doc/grub-doc/.

...


ok, grub seems to be correctly configured. Might be a problem with initramfs utils that are bugged or poorly configured, since last upgrade. can you post the content of /etc/initramfs-tools/initramfs.conf please ?

br, mathieu

andreselsuave
August 13th, 2009, 02:29 PM
There it is. Thanks for your time! :)

#
# initramfs.conf
# Configuration file for mkinitramfs(8). See initramfs.conf(5).
#

#
# MODULES: [ most | netboot | dep | list ]
#
# most - Add all framebuffer, acpi, filesystem, and harddrive drivers.
#
# dep - Try and guess which modules to load.
#
# netboot - Add the base modules, network modules, but skip block devices.
#
# list - Only include modules from the 'additional modules' list
#

MODULES=most

#
# BUSYBOX: [ y | n ]
#
# Use busybox if available.
#

BUSYBOX=y

#
# COMPCACHE_SIZE: [ "x K" | "x M" | "x G" | "x %" ]
#
# Amount of RAM to use for RAM-based compressed swap space.
#
# An empty value - compcache isn't used, or added to the initramfs at all.
# An integer and K (e.g. 65536 K) - use a number of kilobytes.
# An integer and M (e.g. 256 M) - use a number of megabytes.
# An integer and G (e.g. 1 G) - use a number of gigabytes.
# An integer and % (e.g. 50 %) - use a percentage of the amount of RAM.
#
# You can optionally install the compcache package to configure this setting
# via debconf and have userspace scripts to load and unload compcache.
#

COMPCACHE_SIZE=""

#
# NFS Section of the config.
#

#
# BOOT: [ local | nfs ]
#
# local - Boot off of local media (harddrive, USB stick).
#
# nfs - Boot using an NFS drive as the root of the drive.
#

BOOT=local

#
# DEVICE: ...
#
# Specify the network interface, like eth0
#

DEVICE=eth0

#
# NFSROOT: [ auto | HOST:MOUNT ]
#

NFSROOT=auto

regala
August 13th, 2009, 02:48 PM
There it is. Thanks for your time! :)


hum, I can't see anything bad. Is there a chance you can put the initrd associated file somewhere one can access it from the internet ?
The content may be rubbish, in case something bad happened when it was generated in the installation procedure of linux-image-whatever-14, OR once more the kernel image + modules deb package uploaded to the repository is screwed and no one checked it (it would not be the first time, and likely the last either)

andreselsuave
August 13th, 2009, 04:13 PM
Bah, It doesnt matter. I don't want to waste our time more with this, I'm in no need to use the 2.6.28-14 kernel. I will stick to the 2.6.28-11 for the moment. Just removing the first two lines from /boot/grub/menu.lst will do, right?

Thanks a lot

johnschong
August 13th, 2009, 04:37 PM
If I use ext4 for the ubuntu, I will part 200mb ext3 for /boot, and the other for ext4

andreselsuave
August 13th, 2009, 04:39 PM
why is that? does ext4 fail for /boot partition?

regala
August 13th, 2009, 05:03 PM
why is that? does ext4 fail for /boot partition?

no because it wouldn't be able to even read the menu.lst or the stageX files necessary to start grub.
the error message is clear about something: it does not recognize any hard drive.

br, mathieu