Comment 1 for bug 2013042

Confirmed in Ubuntu 23.04. The issue happens on my external monitor (2560x1440@60Hz) set as primary monitor and located above the laptop's internal FullHD display (both physically and virtually). Background with no elements on it is only displayed on my secondary monitor (laptop screen when external monitor is plugged in) when lock screen is displayed. If I unplug the external monitor, lock screen is correctly displayed on my internal laptop screen, together with the background.