@greypilgrim I had the same problem using Plasma w/Wayland. My PC suddenly had issues with sleep/suspend, and sometimes even shutdown. My PC would "wake up", but my monitor wouldn't display anything. And sometimes, I'd tell my PC to shutdown but while the monitor would shut off, my PC would keep running. With the former, I was sometimes able to reboot the PC by opening a terminal and typing reboot (all while looking at a black screen). With the latter, I'd have to manually shutdown.