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Thread: Grub resets to grub prompt

  1. #1
    Join Date
    Jul 2019
    Beans
    1

    Grub resets to grub prompt

    I have elementary OS and Windows 10 on dual boot. Grub was working fine after installation but after a while I started ending up with a blank screen with just the grub prompt instead of my usual boot choices.
    Running boot-repair via a live USB stick ends up with "An error occurred during the repair" message. I have tried the following suggestion on the same boot-repair error message dialog "Please do not forget to make your BIOS boot on sdb1/EFI/ubuntu/shimx64.efi". I used bcdedit when in Windows command prompt as suggested. This still did not resolve the issue.

    Here is the pastebin url from the BootInfo summary generated by boot-repair.
    http://paste.ubuntu.com/p/JhHg8z6vMR/

    The output from `efibootmgr -v` is given below

    BootCurrent: 0002
    Timeout: 0 seconds
    BootOrder: 0002,0000,0001,2001,2002,2003
    Boot0000* Windows Boot Manager HD(1,GPT,180eecda-c824-46e1-965c-d739700810b1,0x800,0x32000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)RC
    Boot0001* ubuntu HD(1,GPT,180eecda-c824-46e1-965c-d739700810b1,0x800,0x32000)/File(\EFI\ubuntu\shimx64.efi)
    Boot0002* ubuntu HD(1,GPT,180eecda-c824-46e1-965c-d739700810b1,0x800,0x32000)/File(\EFI\ubuntu\shimx64.efi)RC
    Boot2001* EFI USB Device RC
    Boot2002* EFI DVD/CDROM RC
    Boot2003* EFI Network RC



    Any help would be highly appreciated. Thank you for your assistance.
    Last edited by risavkarna; July 16th, 2019 at 01:40 PM. Reason: added efibootmgr output

  2. #2
    Join Date
    Jun 2009
    Location
    SW Forida
    Beans
    Hidden!
    Distro
    Ubuntu

    Re: Grub resets to grub prompt

    Moved to Other OS since not Ubuntu.

    Acer has required "trust". Did you enable that since entries are shown as Ubuntu, not unknown which is what Acer initially shows.
    Acer Trust Settings - details, some now report that then secure boot has to be on to set trust:
    https://ubuntuforums.org/showthread....2#post13369742 &
    https://ubuntuforums.org/showthread.php?t=2297947 &
    https://ubuntuforums.org/showthread.php?t=2358003
    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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