I recently upgraded to Plasma 6.0.5 running on Wayland, and am now experiencing issues with my dual monitor setup. Previously, both monitors (one connected via HDMI and the other via DisplayPort) functioned perfectly. However, after the upgrade, I’ve encountered a problem.
Both monitors display the login screen (SDDM) without any issues, but once I enter my password, the monitor connected via HDMI shows “no signal”. Interestingly, when I switch to a tty terminal, both monitors work fine.
I think it may have something to do with the nvidia:
NVIDIA-SMI 550.90.07
Driver Version: 550.90.07
CUDA Version: 12.4