I have Ubuntu 16.04 running on Virtualbox. I did install guest additions from the host. While I was troubleshooting a black screen of death, I had set it to boot to console.
Now. I don't remember how can I restore the boot to start
lightdm automatically. I currently have to run
$ sudo service lightdm start $ sudo killall Xorg
on a console before I can actually use it.
lightdm gives me a black screen on
tty7 until I kill
Xorg. I have no idea why that happens.