I have tried this Ubuntu 14.04 stuck on shutdown
But it did not help. The GRUB_CMDLINE_LINUX_DEFAULT
setting actually wasn't there for me so I added it. Now I get the 'splash' screen (server style) on shutdown but still the computer does not power off.
When I run sudo shutdown now
Ubuntu stops all services and goes into a single user mode with a root
user prompt on the screen, but does not power off the machine.
This is a Mac Pro 2008 machine (EFI).
It is a new installation from this iso ubuntu-14.04.5-desktop-amd64+mac.iso
Thanks.
sudo shutdown -h now
) where -h means halt-power after shutdown. shutdown strictly means the OS itself shuts down, not the hardware (unless you add -h or --poweroff) – guiverc Jun 09 '18 at 00:37