gnuboot/website/docs/bsd/index.md

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It is highly recommended that you use the SeaBIOS payload. ROM images are available in the latest Libreboot release, which start with the SeaBIOS payload.

The ROM images with GNU GRUB also have SeaBIOS available in the boot menu. GNU GRUB, when compiled as a coreboot payload, runs on bare metal and it can boot any other coreboot payload if you use the chainloader command.

The way to use SeaBIOS is fairly self-explanatory. SeaBIOS functions the way you would expect on a typical computer. Libreboot currently lacks any sort of documentation for SeaBIOS, but you can refer to their website: https://seabios.org/SeaBIOS

SeaBIOS is especially recommended if you're doing an encrypted installation.

The benefit to using SeaBIOS is that it's basically more reliable. For example, ZFS support is less reliable in GRUB, but a FreeBSD system booted in SeaBIOS would work just fine because you'd be using FreeBSD's own bootloader in that instance.

GNU GRUB payload

GRUB can directly boot many BSD kernels, but support for this is quite unreliable compared to its support for booting Linux kernels. However, you can use GRUB.

When you use GNU GRUB directly, in this way, the various BSD bootloaders are bypassed entirely.

We have separate pages for each BSD system: