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

[kp_auburn]

@nrickert

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

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?

[nrickert]

@kp_auburn

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.

[mrmazda]

@kp_auburn

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 1146017 – "Boot Linux System" from installation media screen 2 consistently fails quickly

[kp_auburn]

@nrickert

Whichever is most convenient for you.

All you need is a UEFI boot and the “efibootmgr” command.

@mrmazda](https://forums.opensuse.org/member.php/17760-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?

[nrickert]

@kp_auburn

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:

mount /dev/sda1 /mnt
ls /mnt/EFI
ls /mnt/EFI/opensuse
ls /mnt/EFI/Microsoft

[kp_auburn]

@nrickert

It shows that there isn’t any boot entry for openSUSE.

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

Try:

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?

[mrmazda]

@kp_auburn

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:

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.

[kp_auburn]

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!