Dell laptop function keys stopped working between 5.10.46 and 5.13.9

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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@xxxxxxxxxxxxxxxx) (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@xxxxxxxxxxxxxxxx) (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



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