Libreboot 26.10 "Ominous Olive" Lands With Full UEFI Support — Firmware Freedom Meets the Modern Era

by Geth Author

After more than eight months since its previous release, Libreboot 26.10 "Ominous Olive" arrived on October 15th with the project's most significant architectural change in years: full UEFI support. For the free firmware community, it's a milestone that finally bridges the gap between firmware freedom and modern operating system compatibility.

Why UEFI Matters for Libreboot

Libreboot is a distribution of coreboot — free, open-source BIOS/UEFI firmware that replaces the proprietary firmware shipped with most computers. Its previous releases relied primarily on GRUB and SeaBIOS as boot payloads, which worked well for Linux but created friction for users wanting to dual-boot Windows or FreeBSD.

Libreboot 26.10 makes MrChromebox's EDK2 the default boot payload on most supported 64-bit systems. EDK2 is the open-source implementation of the UEFI specification, which means Libreboot-flashed machines can now boot Windows 10 and 11 alongside Linux, FreeBSD, and OpenBSD without hacks or workarounds. GRUB EFI and SeaBIOS remain available through the EDK2 boot menu for legacy compatibility.

New Hardware Support

The release adds support for several new machines: ThinkPad X270 and X280, Dell OptiPlex 5050 SFF and 3040 Micro, and the Supermicro X11SSH-F. The project also adds Chromebook configurations — a notable expansion of scope. The catch: Chromebook support is currently source-only, with only the Bay Trail-based Kip platform confirmed as tested. Binary builds for Chromebooks will follow as the configurations mature.

Another practical addition is SMMSTORE support across all EDK2-enabled boards, allowing users to persistently save boot settings without reflashing the firmware — a quality-of-life improvement that removes a common friction point in the flashing workflow.

The Caveat

Libreboot's own release notes warn that "major design changes were made to this release, in ways that may affect lots of existing setups." If you're currently running an older Libreboot version, read the migration notes carefully before upgrading. The UEFI shift is architecturally significant enough that existing configurations may need adjustments.

What This Means for Firmware Freedom

Libreboot's UEFI support matters beyond the technical details. The practical barrier to firmware freedom has long been the inability to run modern OSes — particularly Windows — on Libreboot-flashed hardware. For users who need Windows for work or gaming alongside their Linux setup, that was often a dealbreaker. Libreboot 26.10 removes that excuse.

The Chromebook additions are also worth watching. Chromebooks are abundant, cheap on the secondhand market, and often run coreboot already — making them natural targets for Libreboot. As Chromebook support matures in future releases, the project's accessible hardware base could expand substantially.