F5-573T can't edit UEFI boot order

Redrield
Redrield Member Posts: 4 New User
edited March 2023 in 2017 Archives

When I try to edit my boot order to boot the GNU GRUB boot manager before anything else, so that I can select what operating system to load, on the next boot those settings are erased and replaced with default settings that put the windows boot manager at first priority. Why?

Answers

  • IronFly
    IronFly ACE Posts: 18,413 Trailblazer

    if your OS installations are under UEFI settings, you can try to add the linux efi as a trustable executing.

     

    enter BIOS and under BOOT menu, enable F12 key, then go to  Security tab and enter Select an UEFI file as trusted for executing, browse to the correct efi, then press F10.

     

    at next boot press F12 and choose which OS you want to boot.

    (example)

    /EFI/ubuntu/shimx64.efi  with  secure boot enabled
    /EFI/ubuntu/grubx64.efi  with secure boot disabled

    I'm not an Acer employee.
  • Redrield
    Redrield Member Posts: 4 New User

    That doesn't seem to be the issue, because I have secure boot disabled, and i _can_ boot into GRUB with a lot of hacking. My current solution is that I had to overwrite bootmgfw.efi with grubx64.efi to make it boot

  • doughjohn
    doughjohn Member Posts: 353 Mr. Fixit WiFi Icon

    Hi

     

    Don't know.

     

    I know that my HP lists them in alphabetical order, so Debian was First.  I made the Debian partition ZZDebian so its last choice, but still would work if wanted.

     

    In your case the BIOS for some ACER machines is sadly lacking a hybrid option, and only trusted OS's can run, so it is trusted?

    Do you need shim.efi and MokManager?  Which use trusted methods, MokManager inserts a key into the BIOS/Motherboard area and is then accepted and works.

     

    Have you set a Supervisor password on the BIOS?  Tried for Legacy boot?

  • IronFly
    IronFly ACE Posts: 18,413 Trailblazer

    Redrield wrote:

    That doesn't seem to be the issue, because I have secure boot disabled, and i _can_ boot into GRUB with a lot of hacking. My current solution is that I had to overwrite bootmgfw.efi with grubx64.efi to make it boot


    trust me, that's the real solution if you don't want to have GRUB breaked by windows updates.

    I'm not an Acer employee.
  • Redrield
    Redrield Member Posts: 4 New User

    Can't get broken by windows updates if windows isn't installed

  • IronFly
    IronFly ACE Posts: 18,413 Trailblazer

    you said, it put windows boot manager at first reboot...that means an EFI partition (created by a windows OS installation) is still there.

    I'm not an Acer employee.
  • Redrield
    Redrield Member Posts: 4 New User

    It loads Windows Boot Manager as the first priority regardless of whether I have a windows partition or not. It's gotten to the point where I've had to overwrite bootmgfw.efi with grub in order to get it to boot correctly