→ http://gimx.fr/wiki/index.php?title=Mouse_tweaks#For_Linux.2FUbuntu
gksudo gedit /etc/modules
-r usbhid
usbhid mousepoll=4
reboot et vérifier que al valeura bien été prise en compte :
cat /sys/module/usbhid/parameters/mousepoll

→ http://askubuntu.com/a/686497/469476
##vim /usr/local/bin/touchpad_toggle.sh


#!/bin/bash
declare -i ID
ID=`xinput list | grep -Eio 'touchpad\s*id\=[0-9]{1,2}' | grep -Eo '[0-9]{1,2}'`
declare -i STATE
STATE=`xinput list-props $ID|grep 'Device Enabled'|awk '{print $4}'`
if [ $STATE -eq 1 ]
then

  xinput disable $ID
  # echo "Touchpad disabled."
  # notify-send 'Touchpad' 'Disabled' -i /usr/share/icons/Adwaita/48x48/devices/input-touchpad.png

else

  xinput enable $ID
  # echo "Touchpad enabled."
  # notify-send 'Touchpad' 'Enabled' -i /usr/share/icons/Adwaita/48x48/devices/input-touchpad.png

fi##