Update: Bug fixed in Plasma 6.3.1
Just posting this since I spent over an hour trying to figure out why I couldn’t open my desktop today… After booting and logging in I got a black screen. Switched to a terminal but did not see any obvious errors in the logs.
Not fixed for Fedora 41 KDE yet, so I installed plasma-workspace-x11 to use in the meanwhile. Anyone who hasn’t updated to 6.3 yet could probably change their display settings to not use ICC profiles to avoid it.___
I had something similar happen in Plasma 6.1 and 6.2. After I turned off the dccutils support in powerdevil, I have not had the issue since. My desktop is not a laptop, so it’s always powered, same with screen, so I don’t need fancy power profiles.