After login to Plasma5-session (at desktop), even though mouse is set for left-handed, Plasma5 doesn't recogonize until I go into KCM_mouse and reset the setting by selecting right, apply, select left apply. Reproducible: Always Steps to Reproduce: 1. Set Mouse to left-handed (or make sure it's set) 2. Reboot 3. Login to Plasma5 4. Workspace thinks the mouse is right-handed event though the setting shows left Actual Results: Mouse is acting right-handed Expected Results: Mouse should be acting left-handed The setting in KCM_mouse seems to be remembered, it's just not being honored by the desktop.
I just tested and it worked for me. Could you debug a few things for me. Could you attach your .config/kcminputsrc file after changing tell me if running kapplymousetheme from a command line swaps the mouse back.
Duplicate of/related to bug 341706.