Hi Paul,
Let's have a look.
ubuntu-noble$ git log --grep "thermal: core: Change PM notifier priority to the
minimum" origin/master-next
commit 80123fe6fcc3f72ee6fbe7bc6c64043b9e4c91e1
Author: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Date: Fri Jun 14 17:26:00 2024 +0200
thermal: core: Change PM notifier priority to the minimum
BugLink: https://bugs.launchpad.net/bugs/2075154
commit 494c7d055081da066424706b28faa9a4c719d852 upstream.
It is reported that commit 5a5efdaffda5 ("thermal: core: Resume thermal
zones asynchronously") causes battery data in sysfs on Thinkpad P1 Gen2
to become invalid after a resume from S3 (and it is necessary to reboot
the machine to restore correct battery data). Some investigation into
the problem indicated that it happened because, after the commit in
question, the ACPI battery PM notifier ran in parallel with
thermal_zone_device_resume() for one of the thermal zones which
apparently confused the platform firmware on the affected system.
While the exact reason for the firmware confusion remains unclear, it
is arguably not particularly relevant, and the expected behavior of the
affected system can be restored by making the thermal PM notifier run
at the lowest priority which avoids interference between work items
spawned by it and the other PM notifiers (that will run before those
work items now).
Fixes: 5a5efdaffda5 ("thermal: core: Resume thermal zones asynchronously")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218881
Reported-by: fhort...@yahoo.de
Tested-by: fhort...@yahoo.de
Cc: 6.8+ <sta...@vger.kernel.org> # 6.8+
Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Manuel Diewald <manuel.diew...@canonical.com>
Signed-off-by: Stefan Bader <stefan.ba...@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicole...@canonical.com>
matthew@ThinkPad-X1:~/Work/kernel/ubuntu-noble$ git describe --contains
80123fe6fcc3f72ee6fbe7bc6c64043b9e4c91e1
Ubuntu-6.8.0-44.44~1
You should be good with 6.8.0-44-generic which came out this week for
24.04.
Looking at https://kernel.ubuntu.com/reports/kernel-stable-board/ still shows
6.8.0-44-generic still in -proposed for 22.04.... maybe the Kernel Team will
release early next week.
Thanks,
Matthew
** Bug watch added: Linux Kernel Bug Tracker #218881
https://bugzilla.kernel.org/show_bug.cgi?id=218881
** Changed in: linux-hwe-6.8 (Ubuntu)
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/2080635
Title:
Wrong Battery Reading after Wake from S3 Sleep
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