Well, the first time I saw the problem I was scrolling down on a web-browser and all of the sudden the page zoomed-in, so, I thought it was related to my keyboard, after some time I noticed that the options bar on the browser was displaying, as if the alt-key was pressed, so, i tried to reproduce the error itself outside of the browser, and I unplugged the keyboard from the laptop, and then again, the problem was happening still, this time happened while using the konsole, the alt+s command got activated while I was typing on it .
Both the keyboards are working well. I think is something related to the way the laptop works with linux distributions. I was using ubuntu the first time this happened, I cound’t solve the issue, and so, I decided to move to a different distro, so I installed Opensuse, and the problem is still happening.