Using a second screen but Kubuntu asks me to choose what to show on the screen but the screen says “no signal”

[SoftwareCreator]

Hello,
Just as the title says... I am connecting the screen via HDMI cable and kubuntu asks me wheter I want to mirror my main screen or extend to the right or left and so on and no matter what I choose the screen gets no signal. The wierd thing is, that if I disconnect the HDMI cable kubuntu also asks me what I want the second screen to show.

I hope there are some nice people on here that can help me... I am getting a little desperate with this problem

Greetings SoftwareCreator

 

[JulienCC]

Hello,

How are those screens plugged ?

Random guess : you are on a laptop. Check that there is not "screen switch" on your keyboard, like Fn+Screen Icon.