Libreboot 26.10 adopts UEFI and adds Chromebook support

Libreboot 26.10, codenamed Ominous Olive, introduces full UEFI support by making MrChromebox EDK2 the default boot payload on most supported 64-bit systems, replacing its previous reliance on GRUB and SeaBIOS. This expands compatibility to Windows 10 and 11 alongside Linux, FreeBSD, OpenBSD, and other UEFI-compatible systems. Modern Linux boot methods, including Unified Kernel Images and systemd-boot, are also supported without requiring GRUB as the primary bootloader.

For backward compatibility, Libreboot retains GRUB EFI and SeaBIOS through the EDK2 boot menu, while older 32-bit systems keep their existing configurations. EDK2 also introduces persistent firmware settings, allowing users to change options like boot priority without recompiling or reflashing the firmware.

Hardware support expands with 233 Intel and AMD Chromebook configurations from the MrChromebox coreboot project, alongside the ThinkPad X270 and X280, Dell OptiPlex 5050 SFF and 3040 Micro, and Supermicro X11SSH-F. The new Chromebook configurations are currently source-only, with just the Bay Trail-based Kip platform confirmed as tested. Prebuilt firmware images are available for other supported release targets, although existing users are advised to review the release notes before upgrading due to the architectural changes.