Dear Maintainer, on a fresh install of debian with only lxqt the session can't start and X restart if you install xfce4 + lxqt you can connet with lxqt session if you purge light-locker you can't connect anymore It seems that i got problem (core dump) when lxqt-screensaver start and if light-locker is installed is first autostart and block lxqt-screensaver. so my solution is to install both xfce4 ans lxqt and use lightm and not sddm.
Hi Bertrand, Thank you for your information. May I know if you did the fresh installed debian with D-I image or Debian Live image or something else? Would you mind to provide more details on the steps? Best regards, -Andrew