Comment # 1 on bug 1206457 from Fritz Hudnut

Spent a few minutes trying to "fix" the efibootmgr issue, still no luck on
reviving grub menu to boot Leap 15.5

[CODE]sudo efibootmgr -o 0002, 0080, 0081
[sudo] password for root:
Malformed BootOrder order0002,
                                ^
no00@MBP:~> sudo efibootmgr -O
BootCurrent: 0000
No BootOrder is set; firmware will attempt recovery
Boot0000* ubuntu
Boot0001* opensuse-secureboot
Boot0002* grub
Boot0080* Mac OS X
Boot0081* Mac OS X
Boot0082*
BootFFFF*
no00@MBP:~> sudo efibootmgr -o 0002, 0001, 0080, 0081
Malformed BootOrder order0002,
                                ^
no00@MBP:~> man efibootmgr
no00@MBP:~> sudo efibootmgr -o 0002,0001,0080,0081
Could not set BootOrder: Invalid argument [/CODE]