[ubuntu] I cannot re-enable touch-pad after disabling it - Acer Aspire 5536

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http://ubuntuforums.org – I have an Acer Aspire 3356. And it has a useful button which allows you to disable the touchpad. So when you are typing for example, if you rest you hand on the touchpad you don't click somewhere else on the screen and type there. When you press the button it glows orange and the touchpad is disabled. Then I press it again, the orange glow goes off. However, the touchpad remains disabled. Simply restarting gets it back again. And in windows is comes back normally. I was wondering if there was a way to get it working in Ubuntu. (Hardware)