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Thread: Ubuntu Upgrade: Verify New Kernel associated with Boot Option in Menu.lst (before Re-

  1. #1
    Join Date
    Nov 2009
    Location
    Delaware USA
    Beans
    32
    Distro
    Ubuntu 9.04 Jaunty Jackalope

    Ubuntu Upgrade: Verify New Kernel associated with Boot Option in Menu.lst (before Re-

    Upgrading an Existing version of Ubuntu?

    Insure an appropriate (new) Kernel is associated with your new Ubuntu Install (in Menu.lst) before allowing your system to Re-Boot!
    ------------------------------------------------------------------------------------------------------------------------

    Ubuntu Upgrade Problems caused by a failure to associate the (new) required kernel with the (new) Upgraded version of Ubuntu may cause your system not to Boot - leaving you with an inoperable computer and no easy way to recover.

    Reference these two Install/Upgrade Forum Threads:

    http://ubuntuforums.org/showthread.php?t=1468156
    http://ubuntuforums.org/showthread.php?t=146858

    I have run into this problem on my last two upgrades:
    - 9.04 to 9.10
    and
    -9.10 to 10.04

    How does this Happen?

    Because I don't let the system (Update Manager) automatically install a new Boot/GRUB/Menu.lst file. I don't let this automatically happen because modifications to GRUB (on an earlier upgrade) had destroyed my ability to dual-Boot into Windows in the Past. So I prefer to manually edit the Menu.lst file myself

    During the last phase of the Upgrade process, you encounter a few User Prompts: What asked about new Boot options, I click "Forward" (keep the current configuration) at the User Prompt; thus retaining the old Menu.lst (and old Kernel). But where you run into trouble is if the new Ubuntu Build Version is incompatible with a previous kernel (and requires a new kernel). If (after Upgrade Download+Setup+Install) you allow the system to re-Boot before you insure a proper Kernel is associated with your Ubuntu boot option (in menu.lst); you could run into serious trouble like I did (see previous posts).

    IMPORTANT:

    - Find out what the new Kernel should be before starting the Upgrade Process (that info will be in Support / Forums).

    - Before allowing your Upgraded Ubuntu Build to Re-Boot; Verify the correct New Kernel is associated with your Boot Option listed in Menu/lst:

    - Pathway: Places - Computer - File System - boot/grub/menu.lst

    - If required, Edit the Boot Option with the following commwand (in Terminal):

    sudo gedit /boot/grub/menu.lst

    Save the File

    Now (and not before) it is Safe to Re-Boot into your freshly minted New Ubuntu Build !!!!

    Hope this can help someone avoid my previous pitfalls !

    BVR
    Johnny M!

    Rock On !

  2. #2
    Join Date
    Nov 2009
    Location
    Delaware USA
    Beans
    32
    Distro
    Ubuntu 9.04 Jaunty Jackalope

    Re: Ubuntu Upgrade: Verify New Kernel associated with Boot Option in Menu.lst (before

    PS: I forgot to mention where you can reference the latest and greatest Linux Kernels for your new version of Ubuntu:

    Places - Computer - File System - Boot

    The kernels are listed under boot and look something like this:

    - vmlinuz-2.6.32-21-generic
    - initrd.img-2.6.32-21-generic


    And your Menu.lst text you want to edit

    Places - Computer - File System - Boot/Grub/menu.lst

    looks like this:

    title Ubuntu 10.04
    uuid 1f74fa33-b019-4fe7-ab93-44a43.........
    kernel /boot/vmlinuz-2.6.32-21-generic root=UUID=1f74fa33-b019-4fe7-ab93-44a43499c08a ro quiet splash
    initrd /boot/initrd.img-2.6.32-21-generic
    quiet

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