linux-kernel - Re: Dell laptop function keys stopped working between 5.10.46 and 5.13.9

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Message-ID: <7857ead5-6ccf-3290-9e86-4f16d2bf360f@redhat.com>
Date:   Mon, 16 Aug 2021 12:34:06 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Paul Menzel <pmenzel@...gen.mpg.de>, Dell.Client.Kernel@...l.com,
        Matthew Garrett <mjg59@...f.ucam.org>,
        Pali Rohár <pali@...nel.org>
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Dell laptop function keys stopped working between 5.10.46 and
 5.13.9

Hi,

On 8/16/21 12:22 PM, Paul Menzel wrote:
> [attach Linux 5.13.9 messages (output of `dmesg`)]

Does "lsmod" output include any Dell modules like dell-laptop or
dell-wmi ?

How about on the 5.10 kernel?  It looks like the 5.13 kernel simply
does not have these modules enabled / loaded.

Regards,

Hans


> 
> Am 16.08.21 um 11:48 schrieb Paul Menzel:
>> Dear Linux folks,
>>
>>
>> On a Dell Latitude E7250, updating Linux from 5.10.46 to 5.13.9 (Debian sid/unstable) the two function keys to (un-)mute the microphone, and enable/disable Wifi stopped working. The other function keys continue to work. The `evtest` output did not change.
>>
>>      Linux version 5.10.0-8-amd64 (debian-kernel@...ts.debian.org) (gcc-10 (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2) #1 SMP Debian 5.10.46-4 (2021-08-03)
>>
>>      Event: time 1629104514.184947, type 4 (EV_MSC), code 4 (MSC_SCAN), value 88
>>      Event: time 1629104514.184947, type 1 (EV_KEY), code 240 (KEY_UNKNOWN), value 2
>>
>>      Linux version 5.13.0-trunk-amd64 (debian-kernel@...ts.debian.org) (gcc-10 (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2) #1 SMP Debian 5.13.9-1~exp2 (2021-08-10)
>>
>>      Event: time 1629103829.341409, type 4 (EV_MSC), code 4 (MSC_SCAN), value 88
>>      Event: time 1629103829.341409, type 1 (EV_KEY), code 240 (KEY_UNKNOWN), value 2
>>
>> The output of `acpi_listen` also did not change.
>>
>>      $ acpi_listen
>>       9DBB5994-A997- 000000d0 00000000
>>
>> Are you aware of such reports?
>>
>>
>> Kind regards,
>>
>> Paul