Selecting debian10 from the UEFI boot menu, e produces the expected cursor in Debian Buster's Grub menu. # efibootmgr BootCurrent: 0001 Timeout: 1 seconds BootOrder: 0000,0001,0004,0002,0005 Boot0000* opensusetw Boot0001* debian10 Boot0002* UEFI OS Boot0004* opensuse150 Boot0005* tubuntu