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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?

  • Check /var/crash for a record of gnome-shell or X-server desktop crashes. – user535733 Feb 14 at 13:13
  • Thank @user535733 I looked in the folder and I found gnome-terminal crash report all I could find was ' GLib.GError: g-io-error-quark: Cannot autolaunch D-Bus without X11 $DISPLAY (0)' It comes after messages around VNC Server (by RealVNC), I wonder if that is what is causing a problem. – Jonathan R Feb 14 at 20:33
  • My suspicion is that something is crashing the X stack, which loses all unsaved work and returns you to gdm (the login screen). That would require you to login despite having auto-login enabled. The report you found smells more like a symptom than a cause, since "without X11 $DISPLAY" indicates no X server running -- perhaps an attempted connection after X has already crashed. – user535733 Feb 14 at 20:45
  • Thanks @user535733 I think that the problem is that if the monitor is off it will not login, but if it is on then it will. Perhaps X server only starts if there's a display? I have tried looking in my xorg.conf file but it doesn't exist. I tried switching to lightdm to see if that made a difference but that didn't work, wouldn't even boot into Ubuntu. – Jonathan R Feb 18 at 10:47

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