Armbian by default boots up with user auto login. However, after sudo apt upgrade, I lost the auto login and have to enter password at every boot up.
( Armbian_21.08.0-trunk_Aw-h6-tv_focal_current_5.10.53_xfce_desktop.img)
For those who are interested, this is the solution I made to make it auto login again.
edit /etc/lightdm/lightdm.conf.d/10-slick-greeter.conf, and add these two commands below
autologin-user=yourloginusername
autologin-user-timeout=0
save and reboot