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Thread: Boot repair unable to solve boot problem after Windows Update

  1. #1
    Join Date
    Jul 2014
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    14

    Boot repair unable to solve boot problem after Windows Update

    I have a Toshiba dynabook Satellite Pro C50-A-1K9 laptop. It is dual boot system - Ubuntu 20.04LTE and MS Windows10.

    After I did the latest Windows update, which included a Toshiba BIOS update to 1.80, the computer will only boot into Windows without showing the usual Ubuntu boot menu.

    I ran the boot repair disk from a USB stick, but no change - MS Windows again

    Whilst in Windows, as recommended by boot repair, I typed in the Windows command box:-

    bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi

    No change - it still boots into MS Windows.

    I do have comprehensive backups of my data, but unless there is absolutely no other way, I do not want to start with a fresh install of Ubuntu as there is much software installed and the total size is 1.5Tb

    I have been using Ubuntu for several years now and am familiar with the command line. However, this problem is way out of my league and I would appreciate the assistance of a systems expert! This page, generated by "boot repair" may be useful-

    http://paste.ubuntu.com/p/wWjQhpn8N9/

    It may also be helpful to those who are developing new versions of the boot repair software to hopefully overcome the problems caused by this latest unfortunate update from MS Windows.

    Thanks.

  2. #2
    Join Date
    May 2013
    Location
    Galiza
    Beans
    3,173
    Distro
    Ubuntu

    Re: Boot repair unable to solve boot problem after Windows Update

    Have you already checked UEFI settings > Boot menu? Re-setting "Ubuntu" instead of "Windows bootloader manager" as the first boot in the boot order might be enough.

    Currently you have a likely non-working "Linpus Lite" as the first boot.

  3. #3
    Join Date
    Jun 2009
    Location
    SW Forida
    Beans
    Hidden!
    Distro
    Ubuntu

    Re: Boot repair unable to solve boot problem after Windows Update

    UEFI updates normally reset UEFI to defaults.
    And Windows turns fast start up back on, so then grub cannot boot Windows.

    If UEFI update changed to UEFI Secure Boot mode and Ubuntu was in UEFI mode (without secure boot) then it would not be in UEFI boot menu as only Secure Boot installs are shown.

    Boot-Repair cannot change UEFI settings, nor fix Windows issues. It is primarily for boot issues, most often grub related & reinstall of grub is the main fix it does. It can change a few grub paramters if desired.
    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.

  4. #4
    Join Date
    Jul 2014
    Beans
    14

    Re: Boot repair unable to solve boot problem after Windows Update

    Thanks for your responses.

    Windows fast start up is OFF

    Secure boot is OFF

    Thanks to the last contributor regarding efibootmgr information which I had not come across.

    Tried Boot Repair again with different advanced settings in combination with efibootmgr and the computer
    now boots into Ubuntu - great! However the 'Windows boot' option on the grub menu also now boots into
    Ubuntu! As I use Ubuntu 98% of the time I think I will leave it like that! Windows causes too much
    trouble after a big update! Thanks again.

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