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Thread: GRUB error whith Ubuntu 12.10

  1. #1
    Join Date
    Jul 2012
    Beans
    28

    GRUB error whith Ubuntu 12.10

    Hello,
    I tried to update a server from 12.04 to 12.10 and had an error with GRUB update.
    Paramétrage de grub-pc (2.00-7ubuntu11) ...
    Installation finished. No error reported.
    /usr/sbin/grub-bios-setup: warning: File system `ext2' doesn't support embedding.
    /usr/sbin/grub-bios-setup: warning: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged..
    Installation finished. No error reported.
    Generating grub.cfg ...
    /etc/grub.d/06_OVHkernel: line 6: /usr/lib/grub/update-grub_lib: No such file or directory
    dpkg: erreur de traitement de grub-pc (--configure)*:
    le sous-processus script post-installation installé a retourné une erreur de sortie d'état 1
    My disks :

    cat /etc/fstab
    # <file system> <mount point> <type> <options> <dump> <pass>
    proc /proc proc defaults 0 0
    /dev/sda1 / ext4 errors=remount-ro,relatime 0 1
    /dev/sda2 /home ext4 defaults,relatime 1 2
    /dev/sda3 swap swap defaults 0 0
    sysfs /sys sysfs defaults 0 0
    dev /dev devtmpfs rw 0 0
    Volumes :
    *-volume:0
    description: EXT4 volume
    vendor: Linux
    physical id: 1
    bus info: scsi@0:0.0.0,1
    logical name: /dev/sda1
    version: 1.0
    serial: ca91b4d0-086b-4000-8634-f590e48524ac
    size: 9999MiB
    capacity: 9999MiB
    capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
    configuration: created=2012-06-20 04:08:05 filesystem=ext4 lastmountpoint=/ modified=2012-06-20 04:10:25 mounted=2012-10-20 22:01:31 state=clean
    *-volume:1
    description: EXT4 volume
    vendor: Linux
    physical id: 2
    bus info: scsi@0:0.0.0,2
    logical name: /dev/sda2
    logical name: /home
    version: 1.0
    serial: 58cff4c2-ad19-47f5-af52-ebec61f552a6
    size: 921GiB
    capacity: 921GiB
    capabilities: primary journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
    configuration: created=2012-06-20 04:08:08 filesystem=ext4 lastmountpoint=/home modified=2012-10-20 22:01:32 mount.fstype=ext4 mount.options=rw,relatime,user_xattr,acl,barrier=1 ,data=ordered mounted=2012-10
    -20 22:01:32 state=mounted
    *-volume:2
    description: Linux swap volume
    physical id: 3
    bus info: scsi@0:0.0.0,3
    logical name: /dev/sda3
    version: 1
    serial: 7cff4150-60d7-4fe8-89d9-0123d186e8a8
    size: 511MiB
    capacity: 511MiB
    capabilities: primary nofs swap initialized
    configuration: filesystem=swap pagesize=4096
    Of course, I've got this error whenever I try apt-get dist-upgrade .
    After some googling, I understand GRUB 2 is trying to replace an older version, but I couldn't find a solution. Any help would be appreciated.

  2. #2
    Join Date
    Nov 2009
    Location
    Segur De Calafell, Spain
    Beans
    11,660
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: GRUB error whith Ubuntu 12.10

    You might have had grub2 installed on a partition. In general, that's not recommended so it complains if it needs to reinstall it on a partition.

    In any case, if the upgrade finished OK and only the grub2 upgrade failed, I would chroot into the installation (if you can't boot it right now), remove/purge grub-pc and reinstall it again. Also making sure to install grub to the MBR of the disk which is /dev/sda.
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 12.04 LTS 64bit & Windows 7 Ultimate 64bit

  3. #3
    Join Date
    Jul 2012
    Beans
    28

    Re: GRUB error whith Ubuntu 12.10

    Thank you for your reply, but my knowledge of Ubuntu is very limited.
    As for now, server is up and running. I guess rebooting would be a bad idea right now.
    What is the safest way to uninstall GRUB ? Playing with a bootloader makes me anxious.
    I've got backups, so I could reformat and reinstall from scratch, but I'd prefer to avoid that.

  4. #4
    Join Date
    Jul 2012
    Beans
    28

    Re: GRUB error whith Ubuntu 12.10

    After further searching, I think you mean something like this :

    mount /dev/sda3 /mnt
    chroot /mnt
    install-grub /dev/sda
    update-grub
    Problem is I didn't find how to remove grub before install ???

  5. #5
    Join Date
    Nov 2009
    Location
    Segur De Calafell, Spain
    Beans
    11,660
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: GRUB error whith Ubuntu 12.10

    Of course, I am anxious too when it comes to playing with the bootloader.

    But since your system is working right now, removing grub2 and installing it again should be very easy and safe. You don't need to use chroot, no mounting, nothing. That's only for when you can't boot the system so you have to work from live mode from the cd.

    From within a working system, you can do:
    Code:
    sudo apt-get remove --purge grub-pc grub-common grub (to remove the packages and config files)
    sudo apt-get install grub-pc (it installs all needed files)
    sudo grub-mkconfig (create new config files)
    sudo update-grub (usually there is nothing to update but run it anyway)
    sudo grub-install /dev/sda (to install the new version on the MBR)
    That should do it.
    Darko.
    -----------------------------------------------------------------------
    Ubuntu 12.04 LTS 64bit & Windows 7 Ultimate 64bit

  6. #6
    Join Date
    Jul 2012
    Beans
    28

    Re: GRUB error whith Ubuntu 12.10

    I tried the updates . After that, apt-get update did not find any error. Problem was I couldn't reboot.
    I access the server only by ssh, and even an electrical shutdown with the ISP console did not solve the problem. So I reformatted the disk and reinstalled my backup.
    After a few hiccups, all is fine now.
    Thank you for your help

    Alex

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