SUMMARY The scrolling speed within applications (using a touchpad) varies hugely. System settings, for example, has a very slow scroll speed. Whereas Firefox has a very fast scroll speed. STEPS TO REPRODUCE 1. Use a wayland session 2. Use a touchpad for scrolling 3. Try scrolling in different applications and observe the difference OBSERVED RESULT Scroll speed/sensitivity varies within applications EXPECTED RESULT Scroll speed to be the same in all applications SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Neon (available in About System) KDE Plasma Version: 5.22.0 KDE Frameworks Version: 5.82.0 Qt Version: 5.15.3 ADDITIONAL INFORMATION
Firefox does scrolling its own special way that only it controls; if you find it unpleasantly different from other apps, you'll need to go bug the Firefox people about it. Slow scrolling in QtQuick-based apps is actually the intended speed according to the Qt developers, and the fact that it's faster on X11 is a bug; see https://bugreports.qt.io/browse/QTBUG-56075. In the Plasma Wayland session, you can increase the scroll speed if you want, though.
So in order to get pleasant scrolling in Wayland on plasma, I'll have to accept that Firefox races through? That's too bad. Thanks for your reply, Nate!