Comment 10 for bug 1176035

Until this bug is fixed, see below a workaround to configure and persist the mouse speed setting:

- Open Terminal, then:
xinput --list --short
- Find the id of your mouse and use below:
xinput --set-prop <device_id> "Device Accel Constant Deceleration" <value>
- For instance:
xinput --set-prop 12 "Device Accel Constant Deceleration" 4.8
- Play with the value 4.8 until you find the good one for your mouse. Higher values slowdown the mouse speed.

- To make this setting persist after reboot:
sudo vi /usr/local/bin/xinput.sh
(add your xinput line and save)
sudo chmod 755 /usr/local/bin/xinput.sh
- Press Super to go to Dash, search for "Startup Applications" and click on it to open. Click Add:
  Name: xinput
  Command: /usr/local/bin/xinput.sh
  Comment: xinput settings
- Save and reboot