Black screen on Tensorflow

[ife497]

After having problems on connecing to GPUs in Julia, I decided to give a trial in updating Ubuntu and Lambda stack, folloiwng the instructions given here:

https://docs.lambdalabs.com/linux/upgrade-ubuntu-and-lambda-stack/

Unfortunately, after the command
sudo do-release-upgrade,
The computer restarted and a black screen with a small white “-” on the left top of the screen appear, and apparently it does not respond to any command.

I would like to ask advices on how to solve this problem.

[markd]

This likely means that the GUI terminal session is in use.

1. Hit one of the combinations ‘Control-Alt-F2’ to ‘Control-Alt-F5’
   • This will go to a command line session
2. Login
3. Clean up and reconfirm install
   • One reason is some commands create a xorg.conf
     $ sudo rm /etc/X11/xorg.conf
   • Check if apt is up to date or if there is a issue.
     $ sudo apt update
     $ sudo apt upgrade
     If you get errors like ‘–fix-missing’ and/or ‘–configure’
     $ sudo apt install --fix-missing
     or
     $ sudo dpkg --configure

And you may need to clean up:

 /etc/apt/sources.list
 /etc/apt/sources.list.d/*