can't type a word in the ide of ubuntu14.04

I am using ubuntu 14.04, and I have installed arduino ide 1:1.0.5+dfsg2-2, but I found out that I can't type any words in it, any solution to it ?

I am not using Linux, but you most probably have "use external editor" checked in the IDE settings

Try to run the IDE with sudo

olf2012: I am not using Linux, but you most probably have "use external editor" checked in the IDE settings

No, i don't have that checked

HugoPT: Try to run the IDE with sudo

Thx it works, but why does it happen? i can't type anything if i run the ide by clicking the icon from the desktop