There is a New X11 Server, Written in Rust, With the Help of AI

If you have been keeping an eye on the display server situation on Linux, you know where things are headed. Wayland is taking over as distros are dropping X11 sessions one by one.

So naturally, someone went ahead and built a brand new X11 server from scratch. Developer Jos Dehaes recently went public with yserver, a new MIT-licensed X11 display server written entirely in Rust.

Now, this will either impress you or make you shout "Clanker!" but this project was built with significant help from Claude Code, Anthropic's AI coding agent. The repo has both a CLAUDE.md and an AGENTS.md file in plain sight, making this a proper vibe-coded project.

What is it?

Well, yserver isn't aiming to clone X.Org, rather it is meant to be a practical X11 server for modern Linux that focuses on what real desktop environments and applications actually need today.

Everything that has accumulated over decades and serves no purpose in today's computing environment has been dropped. That includes the DDX driver ABI, multiple X11 screen support, non-TrueColor legacy visuals, indirect GLX, and endian-swapped clients.

Under the hood, yserver drives hardware directly through DRM/KMS and Vulkan, skipping the usual middleware layers that sit between the display server and the GPU. This means a more direct path to the hardware with fewer moving parts sitting in the middle.

According to the project's documentation, yserver uses libseat for seat management, which ensures it can run without root and the core is deliberately single-threaded, resulting in predictable protocol behavior.

What can it do?

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Compiz running under yserver. Video courtesy of Jos Dehaes.

Currently, yserver can already boot into MATE, Xfce, and Cinnamon sessions, and it has also been tested with window managers like FVWM3, e16, and Window Maker. FreeBSD support is on the roadmap, but work on it has not started yet.

Hardware coverage is wider than you might expect. In testing, Jos has covered AMD Ryzen and Radeon setups, Intel Kaby Lake iGPU, NVIDIA with the proprietary driver, Snapdragon X1, and Apple M1 and M2 on Asahi Linux.

These were all tested on MATE, Xfce, and Cinnamon configurations, btw.

The obvious question

Major players in the Linux space like Ubuntu dropped the X11 session in 25.10, Fedora has done away with X11 on its flagship Workstation desktop edition, and KDE has already announced Plasma 6.8 will drop X11 support entirely.

So who is yserver for, exactly? Well, there is still a distinct group of users stuck on X11, whether because of legacy desktop environments, specific hardware setups, or workflows that just have not made the jump yet.

And the project itself is very early. There is one primary contributor, and the security model is incomplete, with the design documentation clearly stating that clients can currently read other clients' windows and global input.

Heck, even the name is a placeholder. 😅

So, yserver won't be replacing Wayland or X11 on your computer anytime soon, but it is a nice project to know about, and it also shows us how prevalent vibe coding has become, whether you like it or not.

Via: Phoronix

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