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[Marek <2114760@xxxxxxxxxxxxxxxxxx>]

I have generated and uploaded a complete ALSA diagnostic report using
alsa-info.sh. Here is the link: http://alsa-
project.org/db/?f=b8e3f740d83d2fa6948504aafcafb3045397e919

I’m running Zorin OS 17.3 (based on Ubuntu 22.04) with Wayland on an
iMac 27" (2017) with the Cirrus Logic CS8409 audio chip. Audio is
currently not detected by ALSA — only Dummy Output is available — and no
audio devices appear in aplay -l or arecord -l.

Let me know if any additional logs or testing would be helpful. I'm
happy to assist in debugging and validating any changes.

Thanks again for your time and work!

-- 
You received this bug notification because you are a member of
Debcrafters packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/2114760

Title:
  Missing drivers for Cirrus Logic CS8409 and AMDGPU on iMac 27" (2017)
  5K

Status in alsa-driver package in Ubuntu:
  New
Status in alsa-ucm-conf package in Ubuntu:
  New

Bug description:
  Subject: Missing drivers for Cirrus Logic CS8409 and AMDGPU on iMac
  27" (2017) 5K

  Dear Ubuntu OS Team,

  I am using Ubuntu 24.04.02 on an iMac 27" (2017) 5K and have
  encountered issues with the Cirrus Logic CS8409 audio chip. Alsa,
  PulseAudio, and Pipewire are unable to properly utilize it. I found a
  driver on GitHub (github.com/egorenar/snd-hda-codec-cs8409), but it
  requires outdated headers, making it impossible to install.

  AMDGPU Issues: During system installation, the display appears in a
  tiny interface. While it works fine after changing the resolution,
  navigating such an interface is extremely difficult. It is unclear
  which resolution is correct for this iMac model.

  Audio Issues:

  There is no sound during installation, after installation, or even
  after system updates.

  The sound settings only show "Dummy Output", with no available audio
  devices.

  When I attempt to install the driver using:

  sudo apt install linux-headers-generic  
  sudo apt install build-essential git gcc-12  
  the driver gets uninstalled after a system update, or the sound stops working entirely—forcing me to repeat the process from scratch. It seems that PulseAudio, ALSA, and Pipewire conflict with the Cirrus Logic CS8409 chip.

  I would like to ask if there is a solution to this issue or whether a
  fix could be included in an upcoming Ubuntu OS update or package
  release.

  Thank you for your help and for the great work on Ubuntu!

  Best regards, Marek

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu7
  ProcVersionSignature: Ubuntu 6.8.0-60.63~22.04.1-generic 6.8.12
  Uname: Linux 6.8.0-60-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.8
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/seq:        mahav      1315 F.... pipewire
   /dev/snd/controlC1:  mahav      1317 F.... wireplumber
   /dev/snd/controlC0:  mahav      1317 F.... wireplumber
  CasperMD5CheckResult: pass
  CurrentDesktop: zorin:GNOME
  Date: Mon Jun 16 20:08:10 2025
  InstallationDate: Installed on 2025-06-01 (15 days ago)
  InstallationMedia: Zorin-OS 17.3 Core 64bit
  PackageArchitecture: all
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  SourcePackage: alsa-driver
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/23/2024
  dmi.bios.release: 0.1
  dmi.bios.vendor: Apple Inc.
  dmi.bios.version: 529.140.2.0.0
  dmi.board.name: Mac-BE088AF8C5EB4FA2
  dmi.board.vendor: Apple Inc.
  dmi.board.version: iMac18,3
  dmi.chassis.type: 9
  dmi.chassis.vendor: Apple Inc.
  dmi.chassis.version: Mac-BE088AF8C5EB4FA2
  dmi.modalias: dmi:bvnAppleInc.:bvr529.140.2.0.0:bd06/23/2024:br0.1:svnAppleInc.:pniMac18,3:pvr1.0:rvnAppleInc.:rnMac-BE088AF8C5EB4FA2:rvriMac18,3:cvnAppleInc.:ct9:cvrMac-BE088AF8C5EB4FA2:sku:
  dmi.product.family: iMac
  dmi.product.name: iMac18,3
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Inc.

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