I have a freshly 12.1-RELEASE installed and trying to run KDE5. I am using the latest nvidia drivers but sddm doesn't seem to load. if I run
service sddm onstart
I get a blank screen with a frozen cursor. If I run sddm-greeter --test-mode
I get could not connect to display, could not load the QT platform plugin "xcb" in "" even though it was found
. I have tried reinstalling sddm and qt5-gui to no avail.