Can't slow down the pointer speed enough

I have changed my mouse, bought a new set but still no use - it's too fast for a designer.

And in the new version (12.04) I don't even know how to find the xorg.conf, or anything would help

Is not there any application for this to adjust mouse sensivity more than the default options like Logitech applications for Windows?

Keyboard and mouse model: Logitech mk520 wireless laser mouse & keyboard set.
Mouse model: m310 (laser, wireless)

Solution 1:

If above method doesn't work, try with the xset command. It allows you to change quite a few aspects of your desktop, including mouse acceleration.

xset m 1 1

The first number is the acceleration, the second is threshold. Don't give any value as zero.

Linked Question: How can I increase the mouse pointer speed beyond the limits set by the Mouse preferences dialog?

this script could help:

https://github.com/rubo77/mouse-speed

you only have to configure the identifier of your mouse in the head of the script using
xinput --list --short

the script sets
xinput --set-prop