Libreboot 26.10 "Ominous Olive" released with UEFI, Chromebook support

Libreboot 26.10, an open-source boot firmware, was released, introducing UEFI support and Chromebook compatibility. This release is available at https://rsync.libreboot.org/stable/26.10/ or through one of the mirrors. Libreboot replaces proprietary BIOS/UEFI firmware on supported Intel/AMD and ARM64 hardware, configuring the machine to enable operating systems like Linux, BSD, and even Microsoft Windows.

The release includes a strong anti-AI policy in AGENTS.md and the use of EDK2 as the default payload, with GRUB/SeaBIOS provided as EFI builds for backward compatibility. The update affects 233 supported boards, including nearly every Chromebook, and requires building from source as binaries are not provided. Additional payloads are available via the ESC keypress at startup, and iPXE is enabled by default on specific boards.

EFI GRUB and CSM SeaBIOS have replaced coreboot payload versions, with bare metal SeaBIOS/GRUB being deprecated and potentially removed in future releases. The release also includes support for AMD AGESA source code on AMD Fam15h mainboards, improving RAM initialization, CPU initialisation, and RAM support. All boards now use EDK2 as the primary UEFI implementation, with older 32-bit-only mainboards using the previous setup.