Today's upgrade (20151002) brought upgrades to the glx-alternative-* packages, they are now at version 0.6.93
However, that failed to fix kdm, which still shows a lightdm screen. However, I think that I understand why this happens. This is the output of the latest systemctl status kdm.service -l:
● kdm.service - LSB: X display manager for KDE Loaded: loaded (/etc/init.d/kdm) Active: active (running) since Mon 2015-11-02 20:50:38 EST; 2min 53s ago Docs: man:systemd-sysv-generator(8) Process: 1195 ExecStart=/etc/init.d/kdm start (code=exited, status=0/SUCCESS) CGroup: /system.slice/kdm.service ├─1426 /usr/bin/kdm -config /var/run/kdm/kdmrc └─1441 /usr/lib/xorg/Xorg :0 vt7 -br -nolisten tcp -auth /var/run/xauth/A:0-GFx8Ya Nov 02 20:50:38 crosshair systemd[1]: Starting LSB: X display manager for KDE... Nov 02 20:50:38 crosshair kdm[1195]: Starting K Display Manager: kdm. Nov 02 20:50:38 crosshair systemd[1]: Started LSB: X display manager for KDE. Nov 02 20:50:40 crosshair kdm_greet[2069]: Cannot load /usr/share/kde4/apps/kdm/faces/.default.face: No such file or directory Nov 02 20:50:48 crosshair kdm[2066]: :0[2066]: pam_unix(kdm:session): session opened for user ckosloff by (uid=0) Please note the line before the last one: .default.face is missing. So, how fix? I already reinstalled kdm to no avail. ------------------------------------------------------------------------