Bug#846278: light-locker fails to unlock

Package: light-locker Version: 1.8.0-1 Followup-For: Bug #846278 Dear Maintainer, on a Debian stable v9 with Xfce over X server "nouveau" (for Nvidia graphic cards), I've noticed for several months this rather painful bug : once the session is locked, either directly or after a suspend, I see

Bug#846278: light-locker is counterproductive

Hello Tomas. What you describe/understand as "magic" about F7/F8 is simple (I don't know if it's a but or a feature) : 1/ once you're logged with lightdm, and you have your X session, only ONE Xorg server is running : user@system:~$ ps a | grep Xorg   675 tty7 Ssl+   0:37