February 2026: Strengthened Wayland support in JetBrainsRuntime by delivering stability improvements and a new popup positioning mechanism. Key fixes ensure windows render reliably on Wayland and correct monitor sizing for transformed outputs, while a new client property standardizes popup behavior across Wayland sessions. These changes reduce UI glitches, improve user experience, and lay groundwork for future Wayland enhancements.

Month: 2026-01 • Repository: JetBrains/JetBrainsRuntime. This month delivered targeted Wayland improvements, stability fixes, and diagnostics enhancements to strengthen Linux desktop support and developer debugging capabilities. Key outcomes include delivering GNOME-specific Wayland modal dialogs, stabilizing undecorated windows, improving input handling, enhancing crash logs, and ensuring accurate display sizing under fractional scaling.

December 2025 (2025-12) — Focused stabilization of Wayland support in JetBrainsRuntime and delivery of a user-facing UI improvement to enhance Linux UX. The month yielded a major feature for unconstrained popup positioning and a comprehensive set of Wayland stability fixes, addressing crashes, assertion errors, and null-pointer issues across core components. These changes reduce crash surfaces, improve reliability for Linux users, and lay groundwork for platform parity with other runtimes. Business value: higher stability on Linux improves user satisfaction, reduces support/triage time, and strengthens confidence in JetBrainsRuntime as a cross-platform solution.

November 2025 monthly summary for JetBrainsRuntime focusing on Wayland stability, diagnostics, and contributor guidelines. Delivered auto-detection of Wayland at startup with selection of Wayland toolkit when available, server-side window decorations, improved focus/activation reliability for KDE Plasma and related Vulkan/SwingSet2 interactions, and targeted fixes including toFront() on KDE Plasma 6.5.2. Reverted a couple of changes to restore stability (JBR-9503, JBR-9301). Introduced verbose JVM crash diagnostics (JNI global references, OOME stack traces, classloader statistics) to accelerate debugging. Updated contributor guidance to submit changes via OpenJDK, aligning with governance. Impact: more reliable Wayland runtime, faster issue triage, and a clearer contribution path. Technologies demonstrated: Java/JVM internals, Wayland protocol integration, Linux window systems, diagnostics instrumentation, and technical documentation.

Month: 2025-10. Focused on stabilizing Wayland UI in JetBrainsRuntime and expanding Wayland AWT test coverage. Key improvements reduced user-facing issues and strengthened the test suite, delivering measurable business value through more robust Linux support and fewer regressions.

September 2025 monthly performance summary focusing on cross-repo delivery of KDE integration, Wayland stability, and input enhancements across JetBrainsRuntime and IntelliJ Community. Key outcomes include KDE-native look alignment by enabling builtin window decorations and KDE-style visuals; stabilization of KDE-themed behavior with regression tests to prevent theme-related failures; Wayland window management improvements to prevent title-bar painting when too small, refine minimum decoration sizes, and fix focus/ungrab issues; a new user-configurable option to disable shadows on Wayland; integration of the Relative Pointer Protocol for more accurate mouse input; and an IntelliJ Community improvement to ensure popups stay active on window deactivation, enhancing usability on Wayland.

Month: 2025-08 — Delivered a focused set of features and bug fixes in JetBrainsRuntime that improve observability, GC control, desktop integration, and UI reliability. Implemented enhanced OOME crash reporting with tests, introduced an explicit GC trigger API for cross-G1/ZGC scenarios, added region-based screenshot capabilities, aligned Fedora GTK theme behavior with the system theme, and cleaned up dead code by removing an unimplemented WLDialogPeer stub. Also fixed window-hiding logic to avoid hiding never-shown surfaces.

July 2025 (2025-07) JetBrainsRuntime monthly summary: Delivered across Unix-like environments a HiDPI surface rendering strategy and improved Wayland focus/input handling. Implemented the HiDPIInfoProvider API for Unix-like systems to expose display scaling and resolution details, enabling correct UI rendering on HiDPI displays. Improved Wayland back-end reliability by refactoring surface-to-peer mapping to correctly associate surfaces with window peers and by adding synthetic focus handling for popups to ensure proper focus when parent windows regain focus. These changes reduce UI misrendering and focus glitches on Linux desktops, improving end-user experience and developer maintainability. Summary of commits includes: e2eaf29085e5ce9c12b29d5042bfde4c8becaf7a; 5419e50d4ef3fda94bc59aa86c456a6ae720a4f0; 81b91d477ffb7314a6f501557fc6ffb59cecce83.

June 2025 monthly performance summary for JetBrainsRuntime focusing on Wayland improvements, stability, and test coverage. Delivered core Wayland-focused features to enhance rendering fidelity and window management, while stabilizing the backend and test pipeline to reduce flakiness. This month’s efforts improved business value by enabling faster release validation and a smoother developer/QA experience on Linux desktops.

May 2025 focused on stabilizing Wayland runtime behavior in JetBrainsRuntime and strengthening test infrastructure. Delivered two critical bug fixes that improve runtime stability, reliability of test executions, and overall user experience on Wayland, with clear business value in reduced risk for deployment and faster feedback loops.

April 2025 monthly summary: Key features delivered and critical fixes across Wayland UI, testing infrastructure, and AWT loading robustness. Wayland improvements deliver stable UI visuals and consistent theming; testing infrastructure updates reduce flakiness and improve cross-environment reliability; AWT loading robustness ensures clearer error reporting and safer native loading across Linux variants. This results in improved user experience, lower maintenance costs, and more reliable CI. Technologies demonstrated include Wayland protocol integration, GTK LaF coordination, AWT/Swing native loading, Alpine/Linux build considerations, and comprehensive test hygiene.

March 2025 (2025-03) delivered platform-ready features for JetBrains Runtime focused on Wayland/GNOME integration, code modernization, and clearer release guidance. This month’s work improves desktop parity on Wayland, enhances maintainability, and clarifies distribution options for users and partners.

February 2025 monthly summary for JetBrainsRuntime focusing on cross-platform stability, performance improvements, and reliability enhancements across Wayland, Windows, and multiscreen scenarios.

January 2025: Focused on Wayland UX and stability with three linked streams: (1) Wayland windowing improvements with RoundedCornersManager API and test coverage for NestedFocusablePopupTest; (2) Wayland stability and IO fixes addressing drag-and-drop crash, clipboard handling, and pixel capture reliability; (3) Initialization robustness for FileSystems preventing NPE via pre-loading providers and added tests. These efforts deliver improved UI fidelity, stability, and startup robustness across Linux environments, reducing runtime surprises for end users and enabling more predictable performance in JetBrainsRuntime-based products.

December 2024 monthly summary for JetBrainsRuntime focused on Wayland UI stability improvements. Delivered targeted bug fixes addressing menu placement across multi-monitor configurations, popup sizing and scaling under fractional UI scaling, and robust focus handling. These fixes improve user experience on Linux Wayland, reduce user-reported issues, and enhance overall IDE stability for developers relying on Wayland. Demonstrated proficiency in low-level UI behavior, multi-monitor support, UI scaling, and regression test reliability, contributing to faster issue resolution and higher developer productivity.

November 2024 Monthly Summary — Wayland UX enhancements in JetBrainsRuntime. Implemented a bug fix for popup positioning under fractional scale when the window is maximized using xdg-output to obtain accurate logical dimensions; improved Wayland cursor handling to reduce UI lag and expand cursor icon mappings. These changes deliver smoother UX on Linux Wayland, reduce visual glitches in popups and settings, and demonstrate proficiency with Wayland protocol, WLToolkit, and performance-oriented UI updates.

October 2024 efforts concentrated on delivering high-value improvements to JetBrainsRuntime with a focus on cross-platform stability and Wayland enhancements, along with reliability improvements in tests and JNI error handling. Key outcomes include substantial Wayland protocol integration and rendering improvements, robust data transfer charset handling, and targeted UI stability fixes across X11 and Linux environments.

September 2024 monthly performance summary for JetBrainsRuntime focused on delivering cross-environment improvements, performance optimizations, and enhanced error diagnostics. The team anchored on reliable user experiences on Wayland, improved crash reporting, and flexible I/O pathways to adapt to varying system properties and workloads.

2024-08 monthly summary for JetBrainsRuntime focusing on Wayland stabilization and runtime observability. Delivered key features and critical fixes that improve stability, performance, and developer experience across Linux/Wayland and WSL environments.

July 2024 – JetBrainsRuntime Wayland startup robustness improvements focused on reducing startup crashes in headless/Wayland environments. Implemented validation of non-optional Wayland interfaces and improved exception messaging to aid diagnosis. Delivery enabled by two commits: af31038ba5327d6837928858486ac287ba1f7089 and 4f8347f0e4f01814853dd529342b9fe91169a52e. This work improves cross-product reliability (notably CLion 2024.2-EAP with Miriway) and enhances observability for faster triage. Business value: higher startup reliability, reduced support overhead, and better user experience in headless and GUI workflows. Technologies/skills: Wayland protocol handling, robust interface validation, improved exception handling, cross-team collaboration, and integration/testing against CLion EAP pipelines.

June 2024 monthly summary for JetBrainsRuntime highlighting stability, modularity, and performance improvements across Wayland and X11 backends, with a focus on delivering business value through reliable UI interactions, improved project asset workflows, and cleaner architecture.

Month: 2024-05 — Focused on stabilizing and modernizing Wayland support in JetBrainsRuntime, delivering improved rendering fidelity, UI consistency, and robust stability across Wayland environments. Key improvements include viewport-based scaling for Wayland surfaces, comprehensive stability/UX fixes to rendering and dialog handling, modernized window decorations for dark/light themes, and maintenance updates to copyright headers. Business impact includes a smoother end-user experience on Wayland, reduced runtime issues and support overhead, and a cleaner, more maintainable codebase across the Wayland-related surface and UI components.

April 2024 monthly summary for JetBrainsRuntime: Delivered Linux/Wayland-focused UI and performance enhancements that improve user experience and provide actionable diagnostics. Key outcomes include: 1) Wayland UI rendering and window management improvements—correct popup positioning, font rendering, smoother window resizing, and proper window body rendering on multi-monitor setups (commits: 7823407e2988d4ea2fca834c01e9ee8192e608c9; 79d211bbc5a1f1c29d04593056963bfdca77f6b1; 675d974edde8052d1ec0c15741f485c18dc07de4; 344cf8152bf202ffee03448866eb62ea7eb4858d). 2) FPS monitoring and performance counters for Linux/Wayland—frame counting and FPS logging to monitor rendering performance (commits: f2753b0f1bf7751c2545f9c7a8799c12ed628248; c707a1de39bc37556f3ef1fe966453319065a57c). 3) Detect virtualization environment via new system property—enables hardware-aware performance and feature adjustments (commit: c4878f1d61adffb23ffe3bd9ecb62101e32718e7).

March 2024: Focused on stabilizing Wayland integration in JetBrainsRuntime and delivering UI scaling and window interaction enhancements. Key accomplishments include implementing UI scale property support and resizable cursors for maximized windows, along with fixes to critical Wayland stability and rendering issues. These changes improve high-DPI and multi-monitor experiences, reduce user-visible glitches, and strengthen cross-platform reliability.

February 2024 focused on stabilizing Wayland-based rendering in JetBrainsRuntime while optimizing build pipelines and expanding test coverage. Delivered key features and fixes that improve stability, performance, and developer productivity: Wayland stability and memory safety improvements, rendering enhancements, CDS archive generation optimization, expanded Wayland test framework coverage, and enhanced diagnostics for post-mortem debugging. These efforts reduce crash risk, improve rendering fidelity, speed up builds, and provide richer insights for debugging and maintenance.

January 2024 performance summary for JetBrainsRuntime: Delivered targeted Wayland performance and stability improvements, expanded GNOME integration for better UX, and hardened frame-callback handling. The work reduced rendering overhead, improved app icon behavior, and increased reliability of window state transitions on Linux desktops. Key outcomes include improved surface buffer handling, dynamic GNOME app icon support, and robust popup/window management under Wayland, aligning with business goals of smoother developer experiences on Linux platforms.

December 2023 — JetBrainsRuntime (JetBrains/JetBrainsRuntime) focused on stabilizing Wayland UI and boosting rendering performance for Linux users. Delivered two key updates: UI stability fixes for Wayland and a rendering performance optimization pass, with measurable improvements to frame timing and memory usage. This work enhances business value by delivering more reliable IDE behavior on Wayland and smoother UX in Wayland sessions across supported IDEs.

November 2023: JetBrainsRuntime focus on Wayland runtime stability and log efficiency. Delivered cross-desktop Wayland compatibility improvements, UI stability enhancements, and targeted logging optimizations to reduce noise while preserving essential diagnostics. Implemented a suite of fixes addressing Wayland interaction points including popup behavior, fullscreen handling, scaling, clipboard reliability, and mutex stability, alongside performance-driven logging reductions in WLToolkit.

October 2023 monthly performance summary for JetBrainsRuntime focusing on Linux/Wayland reliability and test infrastructure improvements. Delivered core Wayland window management enhancements, stabilizing window resizing, popup behavior, and crash-resilient error handling. Stabilized graphical behavior outside Wayland with headless WLToolkit clipboard fixes and Linux X11 timeout protections. Strengthened the test pipeline with updated JBR-specific tests (JDK-8314823) and a new Java process builder pattern to boost test reliability. These efforts reduced crash surfaces, improved user experience for Linux Wayland users, and enhanced CI stability.

September 2023 Monthly Summary for JetBrainsRuntime (JetBrains/JetBrainsRuntime): Focused on stabilizing and expanding Wayland support, improving UI reliability, and broadening test coverage. Delivered new features, fixed critical bugs, and expanded cross-distro compatibility to support enterprise deployments.

Month 2023-08: Stabilized Wayland-based interactions and expanded window management capabilities in JetBrainsRuntime. Focused on reliability, cross-monitor behavior, and API integration to improve Linux user experience and developer ergonomics.

July 2023: Key reliability and platform groundwork contributions for JetBrainsRuntime. Delivered a test stability fix for JTable checkboxes and initiated Wayland support, including clipboard interoperability and essential UI input/mouse groundwork. These efforts improve release quality for CI and establish a solid foundation for Linux/Wayland-native experiences.

June 2023 monthly summary for JetBrainsRuntime focusing on memory stability and GUI robustness. Key outcomes include: (1) VM memory handling improvements to prevent crashes during OutOfMemoryError stack recording and during early VM initialization, with enhanced error reporting. (2) Robust window movement across non-default GraphicsEnvironment configurations, including environment and toolkit validation, explicit handling for unsupported configurations, and updated tests to verify behavior across graphical environments. These efforts increased stability, reliability, and cross-environment compatibility for memory-intensive and GUI-driven workloads.

May 2023 monthly summary for JetBrainsRuntime: Delivered key features and fixes across Wayland integration, Linux window management, and build reproducibility. Key outcomes include Wayland/WLToolkit stability and rendering enhancements (deadlock fix, correct scaling, immutable graphics config, multi-buffer support, headless mode operation, and improved heavy-weight popup rendering with Weston compatibility), Linux window movement via window manager protocols (mouse-driven movement with support checks), and build/packaging improvements for reproducible JDK 21 builds with a dedicated x64 Docker image workflow. These changes reduce startup deadlocks, improve rendering fidelity and UX on Wayland/Linux, and ensure deterministic, CI-friendly builds for shipping and testing.

April 2023 monthly summary for JetBrainsRuntime: Focused on reliability, cross-platform compatibility, and performance in core runtime tooling. Delivered four major areas: (1) Branchdiff improvements with enhanced error handling and performance, enabling precise commit differentiation and faster operation; (2) Cross-platform WatchService compatibility, including MacOSXWatchService refactor for non-Unix file systems via dynamic FS type detection and added tests for custom file system providers; (3) Wayland compatibility fixes across macOS and Linux, consolidating build fixes, excluding problematic libraries on macOS, and ensuring correct AWT initialization; (4) targeted build and runtime stability improvements across Wayland and platform-specific paths. Impact: Reduced debugging time, improved build and runtime stability, and expanded platform support, enabling faster and more reliable feature delivery for customers across macOS, Linux, and Wayland environments.

March 2023 monthly summary for JetBrainsRuntime focusing on delivering business value through clear feature communication, extended runtime interoperability, and improved diagnostics. Highlights include updated feature documentation, Unix Domain sockets support in a custom file system provider, enhanced Java debugging and crash reporting, and a robustness fix for JBR API version handling in development builds. These efforts reduce onboarding friction, enable broader system integration, improve issue triage, and stabilize development workflows.

October 2022 monthly summary for JetBrainsRuntime: key stability improvements, test reliability, and documentation consolidation, with direct impact on runtime safety, CI stability, and contributor onboarding.

In September 2022, the JetBrainsRuntime project delivered three key outcomes that collectively strengthen release governance, stability, and cross-platform safety.

Monthly work summary for 2022-08 focusing on stability, performance, and developer ergonomics in JetBrainsRuntime.

Month: 2022-07 — Delivered a key OpenGL rendering enhancement for JetBrainsRuntime by enabling the OpenGL pipeline by default for Wayland sessions under defined conditions, improving graphics performance and compatibility in virtualized environments. This change reduces manual configuration and supports smoother developer workflows, anchored by commit a9510e7d6ca30b582af9d40d73833fb5ada8a5b0.

June 2022 monthly summary for JetBrainsRuntime focusing on stability, diagnostics, and cross-platform reliability. Delivered core robustness improvements in Windows file streaming, enhanced crash diagnostics, and stabilized file attribute handling, supported by targeted tests and code fixes.

May 2022 – JetBrainsRuntime: Delivered three high-impact fixes that improve reliability, UI correctness, and build stability across Windows and Linux. Focused on business value: preventing file-deletion exceptions due to trailing spaces, stabilizing the jbr-dev build for touch input scenarios, and ensuring popups render on the correct screen after desktop-scale changes. Added tests to maintain regression safety and reduce support overhead.

Monthly summary for 2022-04 focusing on stability and reliability improvements in JetBrainsRuntime for Linux. Key activity centered on a critical Java AWT crash fix in the Linux environment, implemented via careful validation of display screen numbers and guarding Xlib calls to avoid uninitialized values, preventing crashes caused by garbage data.

February 2022 — JetBrainsRuntime monthly summary: Focused on improving Windows build determinism, security, and cross-platform reliability. Key features delivered: reproducible Windows builds with deterministic jar outputs. Major bugs fixed: Windows certificate store compatibility and trust root verification (Windows-ROOT support) with updated module paths and tests. Overall impact: enhanced Windows deployment reliability, security posture, and test coverage, contributing to reduced build churn and smoother Windows releases. Technologies demonstrated: build scripting automation for Windows, Windows module path management, Windows certificate store integration, and Windows-focused test development.

January 2022 monthly summary for JetBrainsRuntime: Focused on improving build reproducibility and cross-environment compatibility. Delivered two key items: an Independent Build Output Paths feature enabling builds to be independent of the build directory, and a NIO directory listing compatibility fix for Google Drive virtual volumes. These changes reduce environment-specific build failures and improve reliability for developers and CI pipelines when working with mounted Google Drive volumes. Demonstrated solid capabilities in build tooling, Java NIO, and compatibility engineering, contributing to business value through more reproducible builds, easier CI integration, and stable local development affected by external volumes.

December 2021 monthly summary for JetBrainsRuntime: delivered key feature and stability fixes across the repository, focusing on build attribution and runtime crash resilience. Business value delivered includes improved build traceability, faster issue isolation, and increased end-user reliability of Java apps built on JBR.

2021-11 JetBrains Runtime monthly summary focused on stability, reproducibility, and cross-architecture build improvements. Key outcomes include fixing a C1 compiler CFG cycle crash, aligning tests with obsolete JVM flag handling, hardening reproducible builds across Linux and macOS, and enabling AArch64 builds via Docker. These changes reduce runtime crashes, improve CI reliability, and expand platform support for customers and internal teams.

October 2021: Cross-platform platform and performance improvements in JetBrainsRuntime, with targeted bug fixes and maintenance for remote usage. Delivered native MacOS WatchService support via FSEvents, UI frame extents optimization, and a robust Ubuntu Swing dialog insets fix with test coverage. Maintenance included reverting remote X Server IDE performance changes to stabilize remote workflows, contributing to improved stability and developer productivity.

September 2021 monthly summary for JetBrainsRuntime. Focused on cross-platform compatibility, security hardening, and filesystem robustness to improve reliability and security for Java on a variety of Linux environments. Delivered features to support musl-based distributions, tightened security controls around privileged actions, and stabilized directory listing with internationalization support, including performance improvements from patched NIO code paths.

Monthly summary for 2021-08 (JetBrainsRuntime). Focused on delivering remote X keyboard input performance improvements, observability, and JNI stability. Key outcomes include performance optimizations in remote typing, enhanced diagnostics for X server communications, and safer native/JVM interop.

July 2021 monthly summary for JetBrainsRuntime – Focused on stabilizing CI/test reliability on XWayland and enabling proactive upstream alignment with OpenJDK. Delivered a targeted test environment fix and introduced a new synchronization tool to keep JBR in sync with OpenJDK, laying groundwork for faster bug fixes and more predictable releases across platforms.

May 2021: Performance-focused improvements for remote X11 image rendering in JetBrainsRuntime, addressing slow IDE UI when connected to a remote X Server from Windows. Implemented a client-side generated image workaround to speed up image rendering by bypassing slow XGetImage() calls. The workaround uses a derived background color and is exposed via a VM property for runtime control. This work enhances UI responsiveness in remote development scenarios and lays groundwork for further X11 remote-performance optimizations.

Monthly summary for 2021-04 focusing on business value and technical achievement for JetBrainsRuntime. Delivered two key changes improving Windows compatibility and ASAN build reliability.