Bug#1041484: kernel: hpet_acpi_add: no address or irqs in _CRS

From	Ben Hutchings <ben@decadent.org.uk>
Newsgroups	linux.debian.bugs.dist, linux.kernel, linux.debian.kernel
Subject	Bug#1041484: kernel: hpet_acpi_add: no address or irqs in _CRS
Date	2024-09-22 22:00 +0200
Message-ID	<JpAUp-e7Yp-1@gated-at.bofh.it> (permalink)
References	<GTgYp-1k7i-1@gated-at.bofh.it> <GTgYp-1k7i-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed, 2023-07-19 at 15:04 +0000, Al Ma wrote:

> Package: linux-image-6.1.0-10-amd64
> Version: 6.1.37-1
> In the journal of a laptop Lenovo ThinkPad T14s Gen1, connected to a docking station ThinkPad Thunderbolt 3 Dock Gen 2/Workstation Dock Gen 2 Type 40 AN (which is powered by a 135 W AC Adapter ADL135NCC3A) and to a monitor Philips 275B1 via a HMDI cable, we discovered the following warning (last line is yellow) generated at boot:
[...]

> Jul 19 16:20:34 AnonymizedLenovoThinkPadT14s kernel: hpet_acpi_add: no address or irqs in _CRS
[...]

This was also reported as appearing on Lenovo ThinkPad T14 gen 4
running Linux 6.10.  I searched for the warning on lore.kernel.org and
found that it also appeared on:

- Dell XPS 13 9360/0596KF, Linux 6.9-6.11
- Intel NUC12WSHi7/NUC12WSBi7, Linux 6.11
- Lenovo IdeaPad 82MG, Linux 6.1
- Lenovo ThinkPad T480, Linux 6.10
- System76 Pangolin, Linux 6.11

Is this likely to be a bug in the driver, or in the firmware?  If this
is a common case where the HPET isn't available and has an incomplete
description in the ACPI table, should the warning message be downgraded
to info level?

Ben.

-- 
Ben Hutchings
The two most common things in the universe are hydrogen and stupidity.

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Bug#1041484: kernel: hpet_acpi_add: no address or irqs in _CRS Ben Hutchings <ben@decadent.org.uk> - 2024-09-22 22:00 +0200

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