64-bit if that matters. My mouse sensitivity slider does nothing, but my acceleration slider works. I'd like acceleration off and sensitivity how I like it, but it refuses to work. I have tested the option on two computers, and both do not change the sensitivity. Any help?
From what I've been able to gather in a short time dealing with this issue is that in Linux/Mac OS X the mouse velocity is mapped 1:1. This means that when you move the mouse one point, the cursor moves one pixel. Depending on how many DPI the mouse have this could be slow/normal/fast for you. The actual 'speed' is controlled via acceleration. Unfortunately it seems that there's no simple solution to disable acceleration and yet increase velocity (having 1:n mapping) like in Windows.
The best solution I could find so far is provided by the user aib on this page: http://superuser.com/questions/259216/disabling-mouse-acceleration-in-x-org-linux.
In short, you set the acceleration profile to
To permanently save this setting you need to edit a config file or create a script that will do that at startup.
Touchpad has been total crap in Mint. Maybe try gpointing-device-settings If not installed, install it, then type it as seen above in terminal. It wont work like it's supposed to, but that's Mint.