Why can't Ubuntu 16.04 LTS shut down?
![Why can't Ubuntu 16.04 LTS shut down? /img/ubuntu-16-04-LTS-xenial-xerox-does-not-shut-down.jpg](http://freesoftware.zona-m.net//img/ubuntu-16-04-LTS-xenial-xerox-does-not-shut-down.jpg)
update 2016/07/01 6pm: SOLVED. Details here (but DO read anyway the whole post, because the cause of this problem on your computer may still be one of those below!)
update 2016/07/01 6pm: SOLVED. Details here (but DO read anyway the whole post, because the cause of this problem on your computer may still be one of those below!)