*** If you're not sure this is actually a bug, instead post about it at https://discuss.kde.org If you're reporting a crash, attach a backtrace with debug symbols; see https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports Please remove this comment after reading and before submitting - thanks! *** SUMMARY I use an Elecom HUGE trackball and, in most of my OS setups, I map its Fn3 button (xinput button 12) to enable using the ball as a two-dimensional scroll wheel. However, there is no way to do this in a Wayland-based KDE setup. I can set the middle mouse button to enable ball scroll mode when held, but then it uses its usual function as the middle mouse button, which is a show-stopper for me. STEPS TO REPRODUCE 1. Attempt to run the xinput commands to set up button 12 as a ball scroll button 2. Look around in the System Settings menu for relevant options 3. Give up or sacrifice your middle mouse button to ball scroll mode OBSERVED RESULT The only way I can set up ball scroll mode in KDE under Wayland is to sacrifice my middle mouse button. EXPECTED RESULT There's a way to use any button I want as the ball scroll button in KDE under Wayland. SOFTWARE/OS VERSIONS Linux: 6.17.7-5 KDE Plasma Version: 6.5.2-1.1 KDE Frameworks Version: 6.19.0-1.1 Qt Version: 6.10.0-3 ADDITIONAL INFORMATION This could also be a boon to accessibility users, as a trackball is larger and easier to manipulate than a scroll wheel or its underlying middle mouse button.