I'm still new to linux and having this annoying bug. Whenever I keep an arrow key pressed for longer than a second, my laptop stops scrolling through the line and starts to write the corresponding number on the numpad (2 for down, 4 for left, ...), until I press exactly that number myself. Does anyone have an idea how to fix this? I'm using ubuntu 16.04 on a Lenovo Thinkpad E560.
Thanks in advance for all replies.