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Thread: Switching Legacy Leap 15.2 install to UEFI on dual boot with Windows 10

  1. #21

    Default Re: Switching Legacy Leap 15.2 install to UEFI on dual boot with Windows 10

    Quote Originally Posted by nrickert View Post
    It looks as if it still wants to use legacy booting. It recognizes that USB device for UEFI booting, but apparently it doesn't recognize anything else except perhaps Windows.

    It might be one of those computers with a broken implementation of UEFI that only works properly for Windows.

    Can you boot linux with UEFI (could be from USB or DVD), and give us the output from
    Code:
    efibootmgr -v
    There's no need to mount any disks for that. It is just giving information about what the firmware knows.

    When I start the computer with UEFI USB should I go to Rescue System or to Start Linux?

  2. #22
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    Default Re: Switching Legacy Leap 15.2 install to UEFI on dual boot with Windows 10

    Quote Originally Posted by kp_auburn View Post
    When I start the computer with UEFI USB should I go to Rescue System or to Start Linux?
    Whichever is most convenient for you.

    All you need is a UEFI boot and the "efibootmgr" command.
    openSUSE Leap 15.2; KDE Plasma 5.18.5;

  3. #23
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    Default Re: Switching Legacy Leap 15.2 install to UEFI on dual boot with Windows 10

    Quote Originally Posted by kp_auburn View Post
    When I start the computer with UEFI USB should I go to Rescue System or to Start Linux?
    If you try "start linux" it will probably fail due to https://bugzilla.opensuse.org/show_bug.cgi?id=1146017
    Reg. Linux User #211409 *** multibooting since 1992
    Primary: 15.1,TW,15.2 & 13.1 on Haswell w/ RAID
    Secondary: eComStation (OS/2)&15.1 on 965P/Radeon
    Tertiary: TW,15.2,15.1,Fedora,Debian,more on Kaby Lake,Q45,Q43,G41,G3X,965G,Cedar,Caicos,Oland,GT218&&&

  4. #24

    Default Re: Switching Legacy Leap 15.2 install to UEFI on dual boot with Windows 10

    Quote Originally Posted by nrickert View Post
    Whichever is most convenient for you.

    All you need is a UEFI boot and the "efibootmgr" command.
    @mrmazda
    You are absolutely correct. Attempt to "Start Linux" from UEFI USB fails.

    @nrickert
    Booting from UEFI USB, going to "Rescue System" and running "efibootmgr -v" produces this result:
    1. https://photos.app.goo.gl/gPpQv1bbjqW3rbba7
    2. https://photos.app.goo.gl/5Jb3vZMo9PSWeogc7 (same screen shot as above just wider view)

    Does this give any indication as to what the issue may be or clues on how to proceed?

  5. #25
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    Default Re: Switching Legacy Leap 15.2 install to UEFI on dual boot with Windows 10

    Quote Originally Posted by kp_auburn View Post
    Booting from UEFI USB, going to "Rescue System" and running "efibootmgr -v" produces this result:
    1. https://photos.app.goo.gl/gPpQv1bbjqW3rbba7
    2. https://photos.app.goo.gl/5Jb3vZMo9PSWeogc7 (same screen shot as above just wider view)

    Does this give any indication as to what the issue may be or clues on how to proceed?
    It shows that there isn't any boot entry for openSUSE.

    Can you check the EFI partition. It appears to be "/dev/sda1".

    Try:
    Code:
    mount /dev/sda1 /mnt
    ls /mnt/EFI
    ls /mnt/EFI/opensuse
    ls /mnt/EFI/Microsoft
    openSUSE Leap 15.2; KDE Plasma 5.18.5;

  6. #26

    Default Re: Switching Legacy Leap 15.2 install to UEFI on dual boot with Windows 10

    Quote Originally Posted by nrickert View Post
    It shows that there isn't any boot entry for openSUSE.

    Can you check the EFI partition. It appears to be "/dev/sda1".

    Try:
    Code:
    mount /dev/sda1 /mnt
    ls /mnt/EFI
    ls /mnt/EFI/opensuse
    ls /mnt/EFI/Microsoft
    This is the result of running the code above: https://photos.app.goo.gl/cYaqnm2sZKNgTv876

    Do things look the way they should in your opinion?

  7. #27
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    Default Re: Switching Legacy Leap 15.2 install to UEFI on dual boot with Windows 10

    Quote Originally Posted by kp_auburn View Post
    Do things look the way they should in your opinion?
    Not if booting 15.2 directly from hard drive is your goal. I'd try this from that shell prompt:
    Code:
    efibootmgr -b 4 -c -L "opensuse152" -l '\EFI\opensuse\grubx64.efi'
    efibootmgr -o 4,0,1,2,3
    Then reboot to test if fix accepted.
    Reg. Linux User #211409 *** multibooting since 1992
    Primary: 15.1,TW,15.2 & 13.1 on Haswell w/ RAID
    Secondary: eComStation (OS/2)&15.1 on 965P/Radeon
    Tertiary: TW,15.2,15.1,Fedora,Debian,more on Kaby Lake,Q45,Q43,G41,G3X,965G,Cedar,Caicos,Oland,GT218&&&

  8. #28

    Default Re: Switching Legacy Leap 15.2 install to UEFI on dual boot with Windows 10

    Many thanks for your help on this topic! It appears that we've successfully switched openSUSE 15.2 legacy install to UEFI. I've tested it a few times and openSUSE 15.2 loads when selected from the GRUB menu and works great! Windows 10 loads and works when Boot Manager is selected from the GRUB menu. I could not have done this without your help. Thanks again!

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