sudo systemctl start sddm.service I can see the login screen and choose various options, but trying any of the Plasma options still results in the above symptoms. The most concerning log entry that seems to occur right when the symptoms occur is: fedora systemd-coredump[4906]: Process 4903 (kwin_wayland_wr) of user 1000 dumped core.home.mount, which systemd will automatically generate. However, the generated home.mount will fail, since /home already exists as a symlink to /var/home on Fedora Atomic./etc/systemd/system/home.mount that overrides the generated mount file, and now everything appears to work.