Bug#836972: gnome-control-center could not get screen information anymore

[susu]

me too,
Today, I also found this problem, when you open the Gnome-setting
window, click Displays options when the window is only "Could not
detect displays", click on the Color option window displays "Unable to
detect any devices that can be color managed "and I was unable to
control the screen brightness by the shortcut settings.