Ubuntu 26.04 LTS 'Resolute Raccoon': Wayland-Only, Rust-Forward

Note: This post was written by Claude Opus 4.7. The following is a synthesis of reporting from Canonical, the Ubuntu documentation team, and the Linux trade press.

Canonical released Ubuntu 26.04 LTS on Thursday, April 23. It is the eleventh long-term-support release in Ubuntu’s history, and the first that ships without an Xorg desktop session. The codename — Resolute Raccoon — is a tribute to Steve Langasek, the Debian and Ubuntu release manager who passed away in January 2025.

This is the largest LTS release in years, and the headline changes are not in the desktop chrome. They are in the parts users rarely see: the init system, the core utilities, the disk encryption stack, and the cryptographic primitives the network code uses to negotiate sessions.

Wayland only, GNOME 50

Ubuntu has shipped Wayland by default since 21.04, but Xorg sessions remained available as a fallback. Resolute Raccoon ends that fallback. The Ubuntu Desktop installation no longer offers an X session at all, although XWayland continues to translate for legacy applications that have not been ported.

The GNOME version jumps from 46 in 24.04 to 50, a four-major-version leap for users coming from the previous LTS. Fractional scaling and variable refresh rate, both labeled experimental in 24.04, are now stable defaults. The Orca screen reader received a substantial accessibility overhaul.

The default application set is also new. Ptyxis replaces GNOME Terminal, Loupe replaces Eye of GNOME, Papers replaces Evince for PDFs, Showtime replaces Totem for video, and a new Resources app consolidates the old System Monitor and Power Statistics into a single dashboard.

Rust in the system path

The most consequential under-the-hood change is the move to Rust implementations of long-standing GNU tools. sudo-rs, the Prossimo project’s memory-safe rewrite of sudo, is now the default sudo provider; the original C implementation is renamed to sudo.ws and remains installable. Similarly, rust-coreutils replaces the GNU coreutils as the default ls, cp, mv, rm, and roughly a hundred other commands. The GNU versions are still available under a gnu- prefix.

Dr. Rebecca Rumbul, executive director of the Rust Foundation, called the shift “an exciting example of what becomes possible when a major Linux distro makes a serious commitment to memory safety.”

Swapping the default to Rust at the LTS level — where conservative enterprises will live for the next five years — is the broadest production deployment of a memory-safe core utility set on Linux to date.

Encryption, post-quantum, and a security center

TPM-backed full-disk encryption is now exposed in the installer, with optional PIN or passphrase recovery. OpenSSL ships ML-KEM, ML-DSA, and SLH-DSA — the three NIST-standardized post-quantum algorithms — and OpenSSH 10.2p1 negotiates a hybrid post-quantum key exchange by default. A new Security Center app surfaces encryption status and Ubuntu Pro entitlements in a single GUI.

Jon Seager, VP of Ubuntu Engineering at Canonical, framed the release as one that “sets the example for providing best-in-class resilience while simultaneously embracing innovation.”

Underneath the desktop, systemd moves to version 259 and cgroup v1 support is removed entirely. Dracut replaces initramfs-tools as the default initial-ramdisk generator.

AI, GPUs, and the new architecture floor

Resolute Raccoon ships native NVIDIA CUDA toolkit packages, AMD ROCm 7.1.0 in the universe repository, and Intel’s DPC++/oneAPI tools — the three major GPU compute stacks all installable from the Ubuntu archive without a third-party PPA. Andrej Zdravkovic, AMD’s chief software officer, said the shift means “organizations can enable powerful AI capabilities” through Ubuntu’s package supply chain rather than vendor installers.

Hardware support broadens at the front and tightens at the back. Intel’s Panther Lake (Core Ultra Series 3) gets Xe3 graphics and NPU optimizations on day one, and Arc Battlemage and Celestial GPUs are supported. On the other end, RISC-V images now require the RVA23S64 ISA profile — older RVA20 boards are no longer supported — and IBM Z is raised to a z15 minimum, dropping z14 and earlier.

A new amd64v3 variant targets the x86-64-v3 microarchitecture level, and several AWS legacy instance families (M1–M4, C1–C4, R3–R4, I2, G3, P2–P3) are no longer supported in the default cloud images.

The codename

Steve Langasek, known in Debian and Ubuntu circles as Vorlon, chose Resolute Raccoon before he died. He had been part of the Ubuntu release team for nearly two decades. Marcus Haslam, the artist who drew the mascot, described it as “designed around resilience and reliability, with a quiet confidence at its core.” Canonical titled the codename announcement “Unmasking the Resolute Raccoon” — a nod to the raccoon’s mask and to the quiet way Langasek shaped releases that millions of people ran without ever learning his name.

What it means for upgraders

Ubuntu 25.10 users will see the upgrade prompt now. Ubuntu 24.04 LTS users will not — direct 24.04 → 26.04 upgrades are gated behind the 26.04.1 point release, scheduled for August 4. That is the standard cadence: Canonical waits for the first round of regression fixes before opening the LTS-to-LTS path.

For most production fleets, that August window is the realistic upgrade target. Five years of standard support takes the release to April 2031; an Ubuntu Pro subscription extends ESM to 2036.