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Date:   Tue, 11 Aug 2020 15:29:55 +0200
From:   Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To:     Stephen Berman <stephen.berman@gmx.net>
Cc:     "Rafael J. Wysocki" <rafael@kernel.org>,
        Zhang Rui <rui.zhang@intel.com>,
        Robert Moore <robert.moore@intel.com>,
        Erik Kaneda <erik.kaneda@intel.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Len Brown <lenb@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <peterz@infradead.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
        "open list:ACPI COMPONENT ARCHITECTURE (ACPICA)" <devel@acpica.org>
Subject: Re: power-off delay/hang due to commit 6d25be57 (mainline)
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On 2020-08-11 13:58:39 [+0200], Stephen Berman wrote:
> him about your workaround of adding 'thermal.tzp=300' to the kernel
> commandline, and he replied that this works for him too.  And it turns
> out we have similar motherboards: I have a Gigabyte Z390 M Gaming
> Rev. 1001 board and he has Gigabyte Z390 Designare rev 1.0.

Yes. Based on latest dmesg, the ACPI tables contain code which schedules
the worker and takes so long. It is possible / likely that his board
contains the same tables which leads to the same effect. After all those
two boards are very similar from the naming part :)
Would you mind to dump the ACPI tables and send them? There might be
some hints.

It might be possible that a BIOS update fixes the problem but I would
prefer very much to fix this in kernel to ensure that such a BIOS does
not lead to this problem again.

> Steve Berman

Sebastian