`shutdown -p now` fails to power off with VirtualBox UEFI boot

[Yasuhiro KIMURA]

From: Warner Losh <imp at bsdimp.com>
Subject: Re: `shutdown -p now` fails to power off with VirtualBox UEFI boot
Date: Mon, 22 Jun 2020 08:57:24 -0600

> Does setting the tunable hw.efi.poweroff=0 help you?

I add it to /boot/loader.conf and then `shutdown -p now` successfully
powers off system.

Does existence of this tunable mean that there are some UEFI
implementations that have problem with power off functionality?
(And VirtualBox is unfortunately one of such implementations?)

---
Yasuhiro KIMURA