Mouse Sensitivity in Linux
From Free Knowledge Base- The DUCK Project: information for everyone
Whether you are talking about mouse speed, sensitivity, or acceleration in linux, adjustment is often difficult.
Mouse is very sensitive in most systems with wireless mouse. The mouse pointer sensitivity is too high and the controls in System Settings don't give the user enough control to reduce it to a useable level. The "Sensitivity" setting seems to do almost nothing. It used to be labeled "Threshold" and it seems to act in reverse of what you might be trying to accomplish.
xset method
This works in newer Mint and Ubuntu distributions, maybe.
xinput --list --short
look at the list output and find your mouse by name.
xinput method
Find the initial setting
xset -q | grep accel
Modify the acceleration
xset m 1/3