After log out I cannot disable my laptop touchpad

I have Lenovo Z580 with Ubuntu 14.04 LTS. Windows Usually both in 7 or Убунту I хан just press FN + F6 to disable touchpad. However, for Ubuntu afterI logged out the operating system and then logged back in прессинг FN + F6 button does nothing.

How хан I disable my touchpad without restarting my computer?