SUMMARY

Pointer speed in KDE is resetting every time I reboot. I set the mouse speed in the System Settings → Input Devices → Pointer speed to the value I want (6th bar) → Hit “Apply” and everything is great.

After reboot, the mouse is much faster. When I go into the settings, they don’t seem to be changed. Pointer speed is still on the 6th bar. To fix it, I have to move it to a different value, hit apply, move it back to the one I want and hit apply again.

Mouse used:  

1. Razer Viper Ultimate (wireless mouse with its own USB dongle). 
2. Logitech M185: budget wireless mouse (also with its own dongle)
2. Steelseries Sensei 310: regular wired mouse

The bug occurs with all models above, specifically on the wireless ones, but it happens randomly on the wired mouse (when it does, first both left and right mouse buttons stop working. After unplug and plugging the mouse, the buttons works again, but pointer speed has been altered to some default speed.


STEPS TO REPRODUCE
1.  Set desired pointer speed
2.  Reboot the system
3.  Check if speed has been altered.  

OBSERVED RESULT

Pointer speed is altered even though the selected value (6th bar, for instance) hasn't changed, apparently. 


EXPECTED RESULT

Pointer speed should remain the same after boot or reboot

SOFTWARE/OS VERSIONS

Linux/KDE Plasma:  Manjaro. Kernel version: 5.15.41-1 (LTS)
KDE Plasma Version: 5.24.5
KDE Frameworks Version: 5.94.0
Qt Version: 5.15.4

ADDITIONAL INFORMATION

Hardware info:
CPU: Ryzen 9 3900X
MoBo: Asus Rog Strix B550-F
RAM: 2x8GB G.Skill TridentZ 3600MHz
Storage device: Samsung 970 EVO Plus 500GB NVMe
GPU: Nvidia RTX 3080