title: Why Night Light not working in Ubuntu 20.04?
body: <p><strong>When I try to set it up the Night Light, nothing happens</strong>. Has anybody met such problem? Please, help with solving.</p>
  <p>Before I restarted my laptop it was working normally. But, after restarting, even I couldn't open the settings display. Then I tried these commands:
  &quot;sudo apt-get update
  sudo apt-get install --reinstall
  gnome-control-center&quot;, after what display settings opened. Unfortunately, there is no response to my setting from display.</p>
  <p>I tried to find the answer in askubuntu.com, but they're directing me to ask from ubuntu server: &quot;apport-collect 1880739&quot;</p>
  <p>P.S. Before restarting I had uninstalled MySql with the following commands:
  &quot;sudo systemctl stop mysql
  sudo apt-get purge mysql-server mysql-client mysql-common mysql-server-core-* mysql-client-core-*
  sudo rm -rf /etc/mysql /var/lib/mysql&quot;
  Might it be the cause of the problem?</p>