I have autologin enabled and it works when I make changes then hit reboot yet within a day or two I have to enter the password to login. As startup programs only open when I do this I know that it has not logged in rather than logged in and logged me out.
I have a Cron job to shut down each night and the BIOS powers it on in the morning.
I have enabled the autologin option in Settings and edited
/etc/gdm3/custom.conf as suggested in https://linuxconfig.org/how-to-enable-automatic-login-on-ubuntu-18-04-bionic-beaver-linux and other answers here but it resets within a day or two.
When editing custom.conf I have tried with and without spaces for
AutomaticLoginEnable = true and my username.
Are there any other suggestions?