linux-kernel - acpi PNP0C14:02: duplicate WMI GUID 05901221-D566-11D1-B2F0-00A0C9062910

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Message-ID: <88716562-a1c3-c8e2-655c-e41cff5f8aec@trent.utfs.org>
Date:   Wed, 4 Nov 2020 00:41:26 +0100 (CET)
From:   Christian Kujau <lists@...dbynature.de>
To:     Mario Limonciello <mario.limonciello@...l.com>,
        Andy Lutomirski <luto@...nel.org>,
        platform-driver-x86@...r.kernel.org
cc:     linux-kernel@...r.kernel.org
Subject: acpi PNP0C14:02: duplicate WMI GUID
 05901221-D566-11D1-B2F0-00A0C9062910

Hi,

while looking through boot messages I came across the following on a 
Lenovo T470 laptop with Linux 5.8:

  acpi PNP0C14:02: duplicate WMI GUID 05901221-D566-11D1-B2F0-00A0C9062910 (first instance was on PNP0C14:01)
  acpi PNP0C14:03: duplicate WMI GUID 05901221-D566-11D1-B2F0-00A0C9062910 (first instance was on PNP0C14:01)

Searching the interwebs brought me to an old patch proposal:

 > https://lkml.org/lkml/2017/12/8/914
 > Fri, 8 Dec 2017 20:34:21 -0600
 > [PATCH 2/2] platform/x86: wmi: Allow creating WMI devices with the same GUID

The patch was proposed, but never made it into mainline. It's not really a 
big deal, booting continues and all devices appear to work, only these two 
messages get logged during boot. I'm just wondering if this needs to be 
fixed or if it's really just a cosmetic issue.

Full dmesg: https://pastebin.ubuntu.com/p/2pPv3hywPF/

Thanks,
Christian.
-- 
BOFH excuse #451:

astropneumatic oscillations in the water-cooling