https://bugs.kde.org/show_bug.cgi?id=483163
--- Comment #41 from nurali <nurali...@foxmail.com> --- This can be fixed by restarting the monitor in a screen-locked (black screen) state. After restarting the monitor, the lockscreen's background image will return and it will not go black again when locking the screen, no matter how or when, until the system is rebooted. (In my case) -- You are receiving this mail because: You are watching all bug changes.