I set the pointer speed in System Setting as low as possible and it is still way too fast. It is a logitech M185 and I am running Ubuntu 12.04. I have the same mouse with my Mac Mini and it isn't crazy fast like the one on my Ubuntu computer.
I just found the solution in this external page.
It seems that you have to modify the
Device Accel Constant Deceleration. The original value is
1, I tried a few settings and it seems that it works perfectly with
2.8 for me.
I used the following command, where
10 is the device id, so you should change the
value with the corresponding for you:
xinput --set-prop 10 "Device Accel Constant Deceleration" 2.8
How to know your
id device? With this command you will see the list of your device and the
xinput --list --short
It's a Linux version of Logitech's Setpoint software that can act as a configuration tool with various options, including sensitivity control.