From owner-freebsd-hackers@freebsd.org  Thu Jul 25 21:30:51 2019
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Subject: Re: 11.2-RELEASE-p11 hang on shutdown
To: Eugene Grosbein <eugen@grosbein.net>,
 FreeBSD Hackers <freebsd-hackers@freebsd.org>
References: <28a4a088-922f-4f95-9d8c-e75250883dd2@freebsd.org>
 <25843b14-dbd9-3464-1382-ca36e5395ee6@grosbein.net>
From: Craig Leres <leres@freebsd.org>
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Date: Thu, 25 Jul 2019 14:30:47 -0700
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On 2019-07-25 01:08, Eugene Grosbein wrote:
> Most probably there is some incompatibility between your BIOS/UEFI code and FreeBSD code.
> First you need to make sure you have lastest firmware flashed and update it if yours staled.

I started with 3.0a and had upgraded to 3.1 and retested before posting 
to freebsd-hackers.

> If that won't help, you could play with sysctl hw.acpi.handle_reboot and/or hw.acpi.disable_on_reboot
> changing their values (0 or 1) one time per try and trying reboot.

Changing hw.acpi.handle_reboot from 1 to 0 didn't help but changing 
hw.acpi.disable_on_reboot from 0 to 1 did.

I fired off a message to supermicro support to see they can fix the bios.

Thank you!

		Craig