Libreboot 26.10 "Ominous Olive" is a major modernization that makes EDK2 UEFI the default payload across nearly all 64-bit-supported boards and imports 233 Intel/AMD Chromebooks from MrChromebox. It adds a prominent anti-AI policy (AGENTS.md) and extends Libreboot’s goal of replacing proprietary firmware with a free, UEFI-capable implementation that now boots Windows 10/11 and modern Linux/BSD setups. Key technical changes include using MrChromebox’s EDK2 fork with Libreboot branding, setting the HAP bit at build time to disable Intel ME, unlocking IFD regions via ifdtool, adding CSMWrap (SeaBIOS wrapped in EFI) and EFI builds of GRUB for backward compatibility, bundling MemTest86+, switching to native Haswell raminit and libgfxinit for many Intel gens, and supporting multiple upstreams through a new build-system feature and an mrimport utility for automated board imports.
Practically, the release enables modern GPU support via EDK2 (including PCIe BAR relocations/rebar when enabled) but disables rebar by default due to Intel iGPU breakage; PCIe Option ROMs are enabled where needed. Some AMD Fam15h mainboards now use the 15h.org coreboot fork for better raminit, IOMMU and TPM support, and several images remain source-only. Bare-metal SeaBIOS/GRUB payloads are deprecated in favor of EFI versions, so users should read the changelog closely for migration caveats and errata before flashing.
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