When I boot this thing up in the morning, my wallpaper will not load up. I am a new Linux user still trying to figure this thing out. But I am perplexed that I get a black screen instead of a particular photo I programmed to be wallpaper. On 2 occasions it has loaded up at startup, but all other occasions it has not. Is there a setting I need to be aware of? I am using Linux Mint 19. Thank you. And I am thrilled I found this forum.