Translations:Install Desktop Environments/100/en
From Manjaro
Install and use LightDM, the recommended display manager for LXQt
sudo pacman -S lightdm lightdm-slick-greeter lightdm-settings light-locker systemctl enable lightdm.service --force
edit /etc/lightdm/lightdm.conf, under [Seat:*] replace the greeter-session setting with greeter-session=lightdm-slick-greeter