Disable auto-lock screen on inactivity Ubuntu 18.04

Solution 1:

These things worked out for me.

commands applied for turning off auto-lock and keep display on are following

if below command gives false then set it to true

$ gsettings get org.gnome.desktop.lockdown disable-lock-screen
$ gsettings set org.gnome.desktop.lockdown disable-lock-screen 'true'

if below command returns true then set it false

$ gsettings get org.gnome.desktop.screensaver lock-enabled
$ gsettings set org.gnome.desktop.screensaver lock-enabled false

if below command returns true then set it false

$ gsettings get org.gnome.desktop.screensaver idle-activation-enabled
$ gsettings set org.gnome.desktop.screensaver idle-activation-enabled false