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Thread: cannot boot older version ubuntu efi

  1. #1
    Join Date
    Nov 2009
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    59

    cannot boot older version ubuntu efi

    i have a older version ubuntu-gnome installed by uefi.
    after i installed new version, i cannot boot into old version.
    i try to keep the key 'shift' down when it reboot, but it doesn't display boot menu .
    how to?
    thanks

  2. #2
    Join Date
    Jul 2005
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    I think I'm here! Maybe?
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    Re: cannot boot older version ubuntu efi

    Try repeatedly pressing the Esc key which is the one I need to press on my UEFI machine. Shift does nothing on my machine either, though this is what I kept pressing in my attempt to boot to an older kernel.

    I'm not sure if this is a change due to UEFI and its use of GPT partitions, but it is mentioned in https://help.ubuntu.com/community/Grub2/Troubleshooting and it must be worth a go!

    I quote
    If the menu is not normally displayed during boot, hold down the SHIFT key as the computer attempts to boot to display the GRUB 2 menu.

    In certain circumstances, if holding the SHIFT key method does not display the menu pressing the ESC key repeatedly may display the menu.
    What the circumstances are is not discussed at any point
    Last edited by ajgreeny; May 2nd, 2013 at 05:37 PM.
    DISTRO: Xubuntu 16.04-64bit --- Code-tags --- Boot-Repair --- Grub2 wiki & Grub2 Basics --- RootSudo --- Wireless-Info

  3. #3
    Join Date
    Nov 2009
    Beans
    59

    Re: cannot boot older version ubuntu efi

    thanks.
    i get into grub menu by ESC key.
    but now it has only the newest version, it didn't keep the older version anymore,,,
    i don't know is i did a mistake when i installed.
    i have a partition EFI to boot, systems were installed in other partitions.
    i can see that it has only one grubx64.efi

  4. #4
    Join Date
    Jun 2009
    Location
    SW Forida
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    Hidden!
    Distro
    Ubuntu 16.04 Xenial Xerus

    Re: cannot boot older version ubuntu efi

    That is normal, but from grub menu you should be able to boot other installs.

    If not try this:
    sudo update-grub

    UEFI boots from each folder in the efi partition. You may be able to copy & rename folders & reconfigure if you really want separate UEFI entries.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

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