The KDE team has released Plasma 6.6.4, the fourth bugfix update in the Plasma 6.6 series.
Much of the work in Plasma 6.6.4 focuses on KWin, KDE’s window manager, which received fixes for Wayland behavior, Xwayland scaling, pointer positioning, accessibility keyboard handling, startup feedback rendering, blur behavior, direct scanout, and various crashes and visual glitches.
The release also resolves several issues in Plasma Desktop and Plasma Workspace. Fixes include improvements to Kickoff and Kicker, desktop icon behavior during drag and drop, shortcut conflict handling, recent apps data, system tray context menu rendering, digital clock clipboard actions, wallpaper selection, panel-related crashes, and device notification handling.
Spectacle, KDE’s screenshot tool, receives a workaround for Qt 6.11-related behavior, and layer-shell-qt addresses a Spectacle crash. The Discover software center includes an improved internal transaction model, and the Dr Konqi crash handler updates coredump thread naming and backtrace generation.
On top of that, Print Manager receives crash fixes, and Plasma NetworkManager corrects the “Last used” refresh behavior after disconnecting.
KDE Plasma 6.6.4 also addresses scaling and visual consistency. Oxygen resolves pixelated window buttons, missing menu shadows, detached tooltip shadows on fractional scaling under Wayland, and panel theme issues. Breeze receives a fix for icon painting. Plasma Integration corrects Qt 6.11 font settings handling and resolves a system tray menu issue.
Lastly, the update includes fixes for the on-screen keyboard, browser integration, libplasma, libksysguard, libkscreen, kpipewire, qqc2-breeze-style, and Plasma Vault. These address predictive text handling, UTF-8 length issues, plugin loading, GPU graph scaling, an NVIDIA SMI process leak, recording behavior in kpipewire, and tooltip binding loops.
For more details, see the release announcement or check out the full changelog. The next update, Plasma 6.6.5, is scheduled for May 12.
