SUMMARY Since Plasma 6.3, the Window Action "Maximize/restore" behaves weirdly when using a touchpad, especially when trying to maximize. STEPS TO REPRODUCE 1. Use Wayland 2. Use a touchpad 3. Under Settings -> Window Management -> Window Behavior -> Window Actions, set "Mouse wheel" to "Maximize/restore" 4. Hover over a window that is not maximized 5. Hold the Meta key and scroll up (or down if Natural Scrolling is enabled) 6. Stop scrolling and release the Meta key OBSERVED RESULT When scrolling, the window jumps quickly between maximized and unmaximized. After stopping scrolling and releasing the Meta key, the window is either maximized or unmaximized. EXPECTED RESULT The window should be maximized and not change its state while scrolling. SOFTWARE/OS VERSIONS Operating System: NixOS 25.05 KDE Plasma Version: 6.3.0 KDE Frameworks Version: 6.10.0 Qt Version: 6.8.2 Kernel Version: 6.13.2 (64-bit) Graphics Platform: Wayland Processors: 8 × 11th Gen Intel® Core™ i5-1135G7 @ 2.40GHz Memory: 31.1 GiB of RAM Graphics Processor: Intel® Iris® Xe Graphics Manufacturer: Framework Product Name: Laptop System Version: AA ADDITIONAL INFORMATION - It worked in Plasma 6.2.5 - It only happens on Wayland, X11 works as expected - It also happens in the latest KDE Neon Unstable Edition Live Image (Plasma 6.3.80) - It also happens on another Laptop using the KDE Neon Live Image - A similar thing can be observed when using Mouse Wheel actions other than "Maximize/restore" - Similar to https://bugs.kde.org/show_bug.cgi?id=476047
Created attachment 178385 [details] Screen Recording of holding the Meta Key and scrolling up with the touchpad
6.2 has never had code to handle touchpad scrolling. https://invent.kde.org/plasma/kwin/-/blob/v6.2.5/src/input.cpp?ref_type=tags#L1780