Hi,
My problem is: my main monitor turns off after login. It works without problem on login screen and with other accounts but happens only in my main account. I'm sure it's problem with systemsettngs5, because the problem started after connecting second monitor for some tests. Now I don't need the second monitor but I HAVE TO plug it in to turn on my main monitor. How can I clear only the screen settings of systemsettings5? Or is there another solution?

EDIT:
Solved by removing ~/.locla/kscreen