How to remove a second unknown display in Ubuntu?

Question

linux

When installing Ubuntu, after the boot logo on a black background, wallpaper appeared without anything. RMB -> Display Settings, found that the default is Unknown Display (physically, there is only one monitor - LG (in the screenshot)). After setting my monitor as the default display, a window appeared with the first setting.

Now sometimes when you reboot a certain Unknown Display becomes the default. How to remove it?

Answer 1

There is such utility xrandr, try to dig in this direction. Most likely she should be able to do what you need.