When you’re going to shutdown/reboot your Ubuntu, it goes through all the motions as if it will shut down, but then it stays on.
I found a solution that fix Ubuntu stays or cannot fully shutdown problem, it may or may not work for everyone, keep reading if you wanna give a try.

Getting Start:

  • Open terminal from the dash home, or press Ctrl+Alt+T, execute this command to edit /etc/default/grub
    gksudo gedit /etc/default/grub
  • Fint out this line:
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
  • Change it into following and save the file.
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi=force"
  • Finally update grub with this command:
    sudo update-grub

It won’t help until after you reboot!