Hi Yves-Alexis, Yes good hunch, I had:
$ dpkg -l xfce4-screensaver light-locker (header) ii light-locker 1.8.0-3+b1 amd64 simple screen locker for lightDM display manager un xfce4-screensaver <none> <none> (no description available) $ aptitude install xfce4-screensaver $ aptitude purge light-locker updating to 1.33.0-1: $ dpkg -l "*lightdm*" (header) ii liblightdm-gobject-1-0:amd64 1.33.0-1 amd64 simple display manager (GObject libr> ii lightdm 1.33.0-1 amd64 simple display manager un lightdm-greeter <none> <none> (no description available) ii lightdm-gtk-greeter 2.0.9-1 amd64 simple display manager (GTK+ greeter) Rebooting. As a consequence, after locking the screen (ctrl-alt-del), I can now unlock & re-enter Xorg again. Thank you. However no change for: $ dm-tool switch-to-greeter Unable to switch to greeter: GDBus.Error:org.freedesktop.DBus.Error.Failed: Failed to switch to greeter Same error occurs if I use xfce gui 'Switch User' So Agustin uses Wayland, I use Xorg, but same error. [ Some (useless?) info ] # lightdm --show-config [Seat:*] A greeter-session=lightdm-greeter B greeter-hide-users=false A session-wrapper=/etc/X11/Xsession Sources: A /usr/share/lightdm/lightdm.conf.d/01_debian.conf B /etc/lightdm/lightdm.conf.d/10_fr_changes_lightdm.conf C /etc/lightdm/lightdm.conf Kind regards, Franck
