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[Ebuntu <2116083@xxxxxxxxxxxxxxxxxx>]

Hi. Nothing happens in the log as the bug is reproduced. I've attached the full output regardless. 
I reproduced the bug several times today on Jul 09, though as you can see, the last log entry is from jul 08 15:05:05.

** Attachment added: "audiobug_journal.txt"
   https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/2116083/+attachment/5888751/+files/audiobug_journal.txt

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https://bugs.launchpad.net/bugs/2116083

Title:
  Audio volume is reset to 100% every time external monitor is plugged
  in

Status in alsa-driver package in Ubuntu:
  Incomplete
Status in pipewire package in Ubuntu:
  Incomplete

Bug description:
  Steps to reproduce:
  1. Connect an external monitor. I've tried on 3 different monitors, both HDMI and USB-C, all trigger the same bug.

  Expected behaviour:
  1. Audio volume remains at same level as before

  Actual behaviour:
  1. Audio volume is set to 100%

  
  This problem started after upgrading to Ubuntu 25.04, on Ubuntu 24.04 there was no such issue.

  ProblemType: Bug
  DistroRelease: Ubuntu 25.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu8
  ProcVersionSignature: Ubuntu 6.14.0-22.22-generic 6.14.5
  Uname: Linux 6.14.0-22-generic x86_64
  ApportVersion: 2.32.0-0ubuntu5.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  erik       3705 F.... pipewire
                        erik       3713 F.... wireplumber
   /dev/snd/seq:        erik       3705 F.... pipewire
  CasperMD5CheckResult: pass
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Jul  7 12:46:48 2025
  InstallationDate: Installed on 2024-07-02 (370 days ago)
  InstallationMedia: Ubuntu 24.04 LTS "Noble Numbat" - Release amd64 (20240424)
  MachineType: LENOVO 20WLS6TT00
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  UpgradeStatus: Upgraded to plucky on 2025-06-19 (18 days ago)
  dmi.bios.date: 02/07/2025
  dmi.bios.release: 1.61
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N35ET61W (1.61 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20WLS6TT00
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.ec.firmware.release: 1.44
  dmi.modalias: dmi:bvnLENOVO:bvrN35ET61W(1.61):bd02/07/2025:br1.61:efr1.44:svnLENOVO:pn20WLS6TT00:pvrThinkPadX13Gen2i:rvnLENOVO:rn20WLS6TT00:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20WL_BU_Think_FM_ThinkPadX13Gen2i:
  dmi.product.family: ThinkPad X13 Gen 2i
  dmi.product.name: 20WLS6TT00
  dmi.product.sku: LENOVO_MT_20WL_BU_Think_FM_ThinkPad X13 Gen 2i
  dmi.product.version: ThinkPad X13 Gen 2i
  dmi.sys.vendor: LENOVO

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