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Thread: Boot error

  1. #1
    Join Date
    Jan 2023
    Beans
    1

    Boot error

    Hello. I'd like help. I've tried installing Ubuntu alongside windows for dual boot but can't get access to either OSs upon installation completion.
    I've done the boot repair which summary is stored here https://pastebin.ubuntu.com/p/vgRZ7TNm2n/

    I will appreciate your input

  2. #2
    Join Date
    May 2008
    Beans
    4,144
    Distro
    Ubuntu 24.04 Noble Numbat

    Re: Boot error

    You have Windows 8/10 in Legacy mode and Ubuntu in UEFI mode.
    Mixed modes on one disk is inherently unstable.
    More info here https://help.ubuntu.com/community/UEFI

    You could try the suggested repair (lines 269 - 283 in the report) but it may not be successful.

    In order to have a robust dual boot system on one disk, you should consider installing both Windows 10 and Ubuntu in UEFI mode with GPT.

    However, before you do anything, make sure that you have backups of your irreplaceable personal data?

  3. #3
    Join Date
    Jun 2014
    Beans
    7,523

    Re: Boot error

    The suggested repair to reinstall Grub in Legacy mode should work. You would need to reboot with Legacy mode enabled and do a Legacy install of Grub since windows is in Legacy mode. A Griub install in UEFI mode will not boot windows installed in Legacy mode. Since both windows and ubuntu are on the same drive, you cannot boot each separately from the BIOS so you need to either reinstall Grub in Legacy mode or reinstall Ubuntu in Legacy mode.

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