SonicDE has become one of the most talked-about names when it comes to keeping the desktop alive in X11 within the KDE ecosystemWhile much of the Linux world is rushing towards Wayland, this project The community has decided to take over from the classic Plasma and KWin code to offer an optimized, polished alternative with a very clear philosophy: prioritizing stability, performance, and user freedom of choice.
Far from being a simple clone, SonicDE is structured as a set of well-defined components: sonic-win as an X11 window managerSonic-workspace as a Plasma-derived workspace, silver-sddm as a login theme, and distribution-specific packages. All of this with a roadmap that includes maintaining and improving X11 support, debugging the legacy KDE code, and offering a cohesive environment that works well on both modest machines and more demanding setups, including gaming and content creation scenarios, with support for Steam-Audio.
What is SonicDE and where did it come from?
SonicDE was born as a direct fork of key parts of KDE PlasmaSpecifically, the workspace and window manager KWin for X11. Its origin is closely linked to KDE's decision to orient Plasma 6.8 and later versions towards a virtually exclusive Wayland model, gradually removing support for X11 sessions. Faced with this change, a group of developers and users who still trusted X11 decided to rescue, clean, and expand the code oriented to this classic protocol.
Initially, the project was called "KDE-Lite," but over time it adopted its current name to better reflect its own identity as standalone desktop environment, although derived from KDESonicDE is not looking to compete with Plasma in the Wayland arena, but rather to offer a solid option for those who need or prefer to continue using X11 for compatibility, performance, or simply personal preference.
Main components of the SonicDE ecosystem
The heart of SonicDE rests on several projects that are developed in a coordinated manner. Each one covers a specific part of the desktop, but they all share the same philosophy: maintainable, reproducible, and X11-centric code.
sonic-workspace: the Plasma-based workspace
The sonic-workspace package is, in essence, a Plasma Workspace fork Original, with all the necessary pieces to build a Plasma-like environment but fine-tuned for X11 sessions. Includes panels, widgets, activity management, backgrounds, notifications and other elements that define the everyday desktop experience.
Within this fork, the developers have been removing parts of the code that focused solely on Wayland, while also modernizing Obsolete items or items marked as deprecated in the original tree. This not only keeps the X11 support alive, but also makes the project sustainable in the medium and long term without carrying unnecessary baggage.
One of the advantages of this modular approach is that certain functions tied to Wayland have been moved to optional components, such as the package sonic-workspace-waylandThis allows for flexible scenarios, for example on devices like Steam Deck, where the user can continue using X11 as usual and activate Wayland only when they need HDR or specific Gamescope integrations, avoiding installing or loading components that they will not use regularly.
sonic-win: X11 window manager and compositor
The other major pillar of the project is sonic-win, a Window manager and compositor for X11 Derived directly from KWin/X11, its main function is to manage windows and graphical effects in conjunction with a desktop shell (such as Sonic Desktop), always with the aim of being as unobtrusive as possible. If everything goes well, the user should hardly notice they are using this particular window manager: its presence should be seamless in everyday use.
Despite this discreet approach, sonic-win integrates a set of advanced features designed for demanding usersprovided they don't conflict with the priority of offering a stable and simple experience. It's not geared towards a very specific user niche, but rather follows the same target audience as the desktop shell that uses it, making it suitable for both lightweight environments and more complete installations.
It is important to emphasize that Sonic-Win is not intended to be a universal replacement for all window managers. It is not a direct alternative to minimalist standalone managers like i3 or openboxNor is it a replacement for managers closely tied to third-party shells (e.g., GNOME Shell). It also doesn't aim to be as spartan as possible or to do away with the default compositor, although it is technically possible to disable compositing or take advantage of X11's network transparency when needed.
silver-sddm and other elements of the environment
In addition to the workspace and the compositor, SonicDE relies on other components that round out the experience. A clear example is silver-sddmA theme for the SDDM login manager designed to visually integrate with the Sonic environment and Plasma 6. This theme is part of a set of packages that provide visual coherence to the system.
Along with the login theme, packages such as sonic-silver-themeThis includes window decorations, application styles, and a highly customizable global theme tailored to the SonicDE aesthetic. The goal is to offer a desktop environment that not only functions well but also boasts a polished and consistent visual identity, while maintaining compatibility with the KDE ecosystem.
Advantages of continuing to use X11 with SonicDE
One of the central arguments of the project is that X11 continues to offer practical advantages. In many real-world scenarios, beyond the theoretical debate between protocols, SonicDE has focused precisely on refining those details that make the difference for the end user.
Polished user experience and features that “just work”
Among the standout features of sonic-win in the X11 environment are the Locally Integrated Menus (LIMs), which allow for a very smooth experience with both classic and modern applications. Furthermore, a very fine inertial displacement implementation, which even under Wine offers a smooth response.
The scrolling behavior in applications like LibreOffice or Qt-based programs results noticeably smoother under X11 SonicDE performs better than certain Wayland environments, based on collected data. In the case of Chromium and its derivatives, some features like drag and drop show greater reliability in a well-configured X11 environment.
The global hotkeys These are another of its strengths: shortcuts like push-to-talk in Telegram or the recording switch in OBS Studio work more predictably in this environment. Similarly, windows are restored to their original positions when closed, both within a session and between sessions, enhancing the sense of continuity.
There are also notable improvements in multi-screen management: apps, including many games, correctly identify which is the home screen and adjust accordingly without any strange behavior. On the other hand, the screen recording and sharing Through tools like TeamViewer or remote desktop solutions, it feels very natural, something that in Wayland still depends on additional layers and specific portals.
KWin/X11 legacy and continuous improvement
KWin for X11 was for years maintained directly by the KDE developersHowever, with the project's shift towards Wayland, that part of the code lost priority. Prior to SonicDE, there were individual efforts such as the guiodic's kwin-x11-improved repository, where patches were applied in 2025 to improve the Plasma experience on X11.
SonicDE picks up that mantle with the intention of going even further: unify improvements, correct errors, and add your own optimizations. based on KWin/X11. Additionally, a Vulkan-based backend for sonic-win is being explored, similar to initiatives such as DXVK 2.1This opens the door to more efficient compositions, lower latency, and better use of modern graphics hardware, something especially interesting for gamers and users who work with intensive multimedia content.
Distributions, packages, and ecosystem around SonicDE
One of the clearest signs of a desktop project's maturity is its inclusion in the repositories of major distributions. In this regard, SonicDE has been gaining ground with Specific packages in Arch Linux, XLibre and OpenMandriva, among other initiatives.
Packages and versions in XLibre
Within the XLibre ecosystem, several key packages related to SonicDE can be found, showcasing both the project's modular structure and its evolution over time. Among these, the following stand out: sonic-win, sonic-workspace and sonic-x11-session, in addition to the Silver themes.
The sonic-win package is distributed as a lighter KWin fork Focused exclusively on X11, in recent versions of the 6.5.x branch, sonic-workspace provides the necessary components to set up a Plasma-like workspace, including fixes and improvements specifically designed for X11 sessions. Complementing these elements, sonic-x11-session provides the ready-to-use desktop session for XLibre, with settings tailored to that environment.
Alongside these functional packages are sonic-silver-sddm and sonic-silver-theme, which respectively provide a theme for SDDM adapted to Plasma 6 and a set of window decorations, app style, and overall theme Highly customizable. All of this forms a fairly coherent whole, both visually and functionally.
Integration with OpenMandriva and improvements in the build chain
A significant milestone in the consolidation of the project has been the arrival of the first Sonic-Win and Sonic-Workspace pull requests to the OpenMandriva infrastructureThis integration has not been limited to simply packaging the code as is, but has involved in-depth work on how dependencies, patches, and compilation processes are defined.
The new build recipes have been designed with a high level of rigor: every dependency is explicitly setAll hashes are validated, each patch has clear documentation, and the compilation steps have been made as deterministic as possible. This attention to detail makes it easier for more developers and maintainers to collaborate without needing to know every intricacy of the code from day one.
The practical result is that SonicDE ceases to depend on a few experts and becomes a more mainstream project open to the community and industrializableAny interested distribution can use these recipes as a basis, trusting that the result will be reproducible and understandable, two key factors for a desktop environment to gain real adoption.
Expanded compatibility with other X11 desktops
One of the most striking aspects of the work on Sonic-Win is that its benefits are not limited to SonicDE itself. Many lightweight environments such as XFCE, LXQt, and other desktops that reuse KWin_X11 Indirectly, users can benefit from the improvements simply by installing sonic-win, without any special configurations.
Users have started reporting Improved frame rate smoothness, reduced RAM usage and more stable behavior in gaming or graphically demanding situations, even when not using the SonicDE session itself. This positive side effect reinforces the idea that the effort invested in optimizing X11 still has room to grow and can benefit a wide range of desktop environments.
Project philosophy and relationship with Wayland, systemd and other platforms
SonicDE is defined not only by its code, but also by the philosophy behind it. Its starting point is a clear stance in favor of... freedom of choice within free software, both at a technical level and in terms of supported platforms.
Position on Wayland and the change of direction of KDE
KDE's commitment to Wayland led to sacrificing some compatibility with X11 and less widespread platforms. Decisions such as Remove FreeBSD support from Plasma Login Manager or abandoning certain alternative paths has been perceived as a way of narrowing the playing field, especially for those who do not quite fit into the most popular desktop model or dominant distributions.
In response to this context, SonicDE presents itself as a way for those who do not want to or cannot yet migrate to Wayland to continue enjoying a modern environment. Furthermore, there is an explicit interest in the project being adaptable to less common platforms, in the style of what XLibre does, opening the door to architectures and systems beyond mainstream Linux.
Cross-platform packaging initiatives and support for other init
The SonicDE community has garnered attention from developers working on projects like Ravenports, a packaging framework that serves systems such as DragonFly BSD, FreeBSD, Linux with glibc, MidnightBSD, NetBSD, and illumos. Thanks to their previous work with KDE Frameworks libraries, these contributors plan to extend its coverage to... SonicDE desktop environment to the extent that compatibility allows.
A recurring point in these conversations is the role of systemd versus other init systemsWhile some parts of the KDE world have adopted a certain reliance on systemd by default, SonicDE is viewed with interest as a project that could continue to function correctly on systems that prefer other init schemes. The intention, from the perspective of the community that supports it, is to provide support for both systemd-based distributions and those that have opted for alternatives, truly upholding that promise of optionality.
Ravenports, by functioning as secondary package manager in a separate prefixIt offers a particularly useful model for young projects like SonicDE that are not yet widely packaged everywhere. This would allow SonicDE to be installed alongside the base system packages, facilitating testing, gradual adoption, and contributions from more environments.
SonicDE community, contribution and participation channels
As a community project, SonicDE relies heavily on the participation of users and developers interested in keeping the Plasma experience alive on X11. The main repository is hosted on GitHub, where you can explore both the source code for sonic-win and sonic-workspace such as the different modules that make up the desktop.
For those who want to contribute code, contribution documentation has been prepared explaining how to get started, how to submit patches, and what the expected workflow is. Bug reports are centralized in the sonic-win bug tracker within GitHubwhere you can open incidents detailing the problem, the environment and the steps to reproduce it.
Beyond the technical aspects, the project maintains a presence on various communication channels: Bluesky, Discord, Mastodon, Matrix, OFTC IRC, Telegram and X (Twitter)These spaces serve both to offer help to end users (always combined with the support provided by each distribution) and to discuss the direction of the project, coordinate tasks or simply share experiences.
Third-party resources are also recommended, such as Improved Plasma X11 guide by guiodicThis includes optimizations designed primarily for Intel graphics cards, and the critical analysis comparing X11 and Wayland prepared by probonopd. These materials help contextualize SonicDE's role in the broader debate about the evolution of the graphical desktop in Linux and other systems.
Overall, SonicDE represents a serious effort to Maintain and modernize KDE's legacy X11 desktopCombining rigorous engineering (reproducible builds, controlled dependencies, true modularity) with a philosophy that prioritizes user and distribution freedom, Wayland is becoming an increasingly attractive and mature option for those not yet convinced to make the definitive leap to Wayland, or who simply want a finely tuned and well-maintained X11 environment.
