First in the home directory the file needs to be /.face not moi.face.icon and should be hidden, then there should also be a /.face.icon file that is a symlink to /.face. Your home folder, as well as the file would need to be viewable by SDDM.
In this case:
Both of these files should be what is created by user manager when you give it your graphic for your user, however these permissions are not set by default. KDM actually had the same issue way back when.
The other option would be to put the moi.face.icon file you created under /usr/share/sddm/faces/ which is the default directory for SDDM to look. As long as the file name matches the users name it will use this one by default.
In this case:
Code:
$ chmod o+x ~/
$ chmod o+r ~/.face.icon
The other option would be to put the moi.face.icon file you created under /usr/share/sddm/faces/ which is the default directory for SDDM to look. As long as the file name matches the users name it will use this one by default.