keyboard sound buttons, volume up/down/off don't work

[Tecromatica]

Upgraded from 22.04 to 23.04, bluetooth keyboard and mouse connect ok. However, the sound buttons which previously worked no longer work.

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: alsa-base 1.0.25+dfsg-0ubuntu7
ProcVersionSignature: Ubuntu 6.2.0-27.28-generic 6.2.15
Uname: Linux 6.2.0-27-generic x86_64
ApportVersion: 2.26.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: jeffmira 1735 F.... wireplumber
 /dev/snd/seq: jeffmira 1733 F.... pipewire
CasperMD5CheckResult: pass
CurrentDesktop: XFCE
Date: Sat Aug 12 22:55:33 2023
InstallationDate: Installed on 2023-01-29 (195 days ago)
InstallationMedia: Xubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
UpgradeStatus: Upgraded to lunar on 2023-08-13 (0 days ago)
dmi.bios.date: 06/14/2023
dmi.bios.release: 1.50
dmi.bios.vendor: LENOVO
dmi.bios.version: N1WET71W (1.50 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20JTS0G900
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.22
dmi.modalias: dmi:bvnLENOVO:bvrN1WET71W(1.50):bd06/14/2023:br1.50:efr1.22:svnLENOVO:pn20JTS0G900:pvrThinkPadT470sW10DG:rvnLENOVO:rn20JTS0G900:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20JT_BU_Think_FM_ThinkPadT470sW10DG:
dmi.product.family: ThinkPad T470s W10DG
dmi.product.name: 20JTS0G900
dmi.product.sku: LENOVO_MT_20JT_BU_Think_FM_ThinkPad T470s W10DG
dmi.product.version: ThinkPad T470s W10DG
dmi.sys.vendor: LENOVO