Enter these commands in your terminal to prevent the log in screen after boot to disappear too quickly:
gsettings set org.gnome.settings-daemon.plugins.power idle-brightness 900
gsettings set org.gnome.desktop.session idle-delay "uint32 900"
gsettings set org.gnome.desktop.screensaver lock-delay "uint32 900"
You can always see the current settings fx for "idle", or anything with this command:
gsettings list-recursively | grep idle
NOTE: If you install Anaconda it might install its own version of glib, taking over gsettings, which might result in the error: "GLib-GIO-Message: Using the 'memory' GSettings backend. Your settings will not be saved or shared with other applications." when trying to use gsettings. A work around is to use "/usr/bin/gsettings" to access the original gsettings.
https://askubuntu.com/questions/916334/ubuntu-16-04-glib-gio-message-using-the-memory-gsettings-backend-your-settin/959346#959346
