Hi,

I did not find anyone else with my problem.

Desktop Settings -> Mouse Actions -> Vertical Scroll set to Application Launcher does not work; if I use the mouse wheel on the desktop nothing happens.
It is only this combination.
Application Launcher with mouse middle click works
Vertical Desktop Change with mouse wheel works

My mouse wheel works in all other situations like expected

new User: same problem, and i have no own xorg.conf. It' a USB HOLTEK Laser Gaming Mouse.

any idea thx