lxqt auto login with sddm
From thelinuxwiki
Problem
An automatic login is desired after unlocking and encrpyted root drive to boot the system. Thus avoiding having to enter a seconds password.
Versions
lxqt 0.10.0 sddm 0.13.0-r4
solution
create file /etc/sddm.conf via root or sudo and add the following lines. Substitute user john with the username of your choice.
[Autologin] User=john Session=lxqt.desktop
reboot