<description>Black screen and LightDM doesn&rsquo;t unlock Add this to your /etc/lightdm/lightdm.conf file:
[LightDM] logind-check-graphical=true Edit previous commands fc is a shell builtin to list and edit previous commands in an editor. In addition to editing a single line (which you can also do with C-x C-e), it also allows you to edit and run several lines at the same time.</description>