https://bugzilla.kernel.org/show_bug.cgi?id=208877
Bug ID: 208877
Summary: power-off delay/hang related to ACPI thermal zone
polling
Product: ACPI
Version: 2.5
Kernel Version: v5.1 starting with commit 6d25be57
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Power-Off
Assignee: acpi_power-...@kernel-bugs.osdl.org
Reporter: stephen.ber...@gmx.net
Regression: No
I'm experiencing a delay or hang in powering off my computer after `shutdown -h
now' and I've bisected it to this commit in the mainline tree:
commit 6d25be5782e482eb93e3de0c94d0a517879377d0
Author: Thomas Gleixner <t...@linutronix.de>
Date: Wed Mar 13 17:55:48 2019 +0100
sched/core, workqueues: Distangle worker accounting from rq lock
I'm filing this bug report at the request of Sebastian Andrzej Siewior, with
whom I've had an exchange on the kernel mailing list about this issue, which
points to ACPI induced polling of the thermal zone causing a buildup of
workers, resulting in the hang/delay; see the thread beginning at
https://lore.kernel.org/lkml/87bln7ves7....@gmx.net/ for details. A workaround
to avoid the power-off delay is to add 'thermal.tzp=300' to the kernal command
line on booting.
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