Since Update of Fedora today, 4/4/19, mouse scroll wheel is slow. It take between 7 an 8 "clicks" of the wheel to cause any page to scroll. It doesn't seem to be application specific, as I have this problem in Chrome and well and Konsole. Alll aps I've tested so far. Including PHPstorm, a Java app. STEPS TO REPRODUCE 1. Login into plasma desktop 2. Open the Chrome web browser 3. Roll mouse wheel OBSERVED RESULT Extremely slow scrolling. Note that grabbing the scroll bar does scroll as expected. It is only the mouse wheel that has this issue. Disabling the mouse detent click does not improve the scroll speed. EXPECTED RESULT Viewport to scroll one line or more per wheel detent click SOFTWARE/OS VERSIONS Operating System: Fedora 29 KDE Plasma Version: 5.14.5 Qt Version: 5.11.3 KDE Frameworks Version: 5.55.0 Kernel Version: 5.0.5-200.fc29.x86_64 OS Type: 64-bit Processors: 12 × AMD Ryzen 5 2600 Six-Core Processor Memory: 15.7 GiB of RAM ADDITIONAL INFORMATION WOrk perfectly prior to this morning's dnf upgrade
If it's happening in all apps including non-KDE ones, then issue is lower in the stack than anything we control. You should contact your distro to see if they switched input drivers on you or something. I wonder if this was the release in which they switched from evdev to libinput, maybe.