I believe the FAQ4 section on multibooting is placing all Grub2 based distributions into the same bucket incorrectly. Debian and its derivatives utilize a different path to BOOTX64.EFI and are amendable to multibooting with OpenBSD. See attached patch for details.
-- J. Scott Heppler
--- faq4.html Wed Jan 26 10:17:32 2022 +++ faq4_new.html Wed Jan 26 10:42:04 2022 @@ -572,8 +572,15 @@ <p> <a href="https://www.rodsbooks.com/refind/";>rEFInd</a> is reported to usually work. -<a href="https://www.gnu.org/software/grub/";>GRUB</a> is reported to usually -fail. +<a href="https://www.gnu.org/software/grub/";>GRUB</a> has issues when +multibooting Fedora, Redhat, and their derivatives. +OpenBSD uses the same /boot/efi/BOOT/EFI/BOOTX64.EFI location as the previosly +listed Linux distributions and will overwrite it on installation. It is +possible to move BOOTX64.EFI to another location but this causes OpenBSD's +kernel relinking to fail. +Debian, and derivatives, utilize /boot/efi/EFI/debian/grubx64.efi which avoids +the conflict. + In either case, you are completely on your own. <h3>Windows</h3>
