Sometimes, when I am typing, I get only capitals. Caps lock is not on. When I log out and log in, the problem is over.
It does not seem a caps-lock problem. I get the characters as with SHIFT. So "2" becomes "@".
I hope I posted this in the right place.
Any suggestions? Thanks.

I have OpenSUSE Leap 42.2 and KDE Plasma 5.8.6.