[Bug 2092363] Re: No Audio Device Detected on HP EliteBook 840 G11 with pc-kernel Snap

[Lukas Mayer]

Having the same issue for quite a long while on a Lenovo E16 Gen2.

Of course the pc-kernel snap seems to be not very recommendable when it lacks hardware support that the apt-managed kernel provides. 
I know that the TPM-based encryption is being considered experimental, but of couse the snap-based kernel should aim for feature parity to a apt-managed kernel. Thus it should be as straight forward to have access to the proper firmware.

Regarding the question on how to include the firmware into the kernel, is this bug even reported at the right place for being percieved by the pc-kernel snap maintainers?
I was trying to look for the repository that the pc-kernel is built from and correspondig documentation to see how this is expected to work for other firmware, but did not find anything useful during a quick search.

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Title:
  No Audio Device Detected on HP EliteBook 840 G11 with pc-kernel Snap

Status in pc-kernel-snap:
  New
Status in apt package in Ubuntu:
  Confirmed
Status in boot-managed-by-snapd package in Ubuntu:
  Confirmed
Status in firmware-sof package in Ubuntu:
  New
Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I am encountering an issue with the pc-kernel snap on my HP EliteBook
  840 G11 laptop running Ubuntu 24.04.1 LTS with the new TPM+FDE
  feature. Despite testing multiple kernel channels, the system fails to
  detect any audio devices. However, when booting into a live session of
  Ubuntu 24.04.1 LTS, audio functions as expected. This suggests the
  issue may be related to the pc-kernel snap.

  Right now I'm on channel 24/stable (version: 6.8.0-50.51), but I have
  tried 24-hwe/stable and 24.10/stable as well.

  For reference, I have first tried to seek help in the support section over at Ubuntu Discourse, and I was encouraged to file a bug report here against the linux package on Discourse:
  https://discourse.ubuntu.com/t/no-audio-device-detected-on-hp-elitebook-840-14-g11-running-ubuntu-24-04/51498/7

  Details:

  OS: Ubuntu 24.04.1 LTS
  Setup: TPM-backed Full Disk Encryption (FDE) using pc-kernel snap
  Kernel Channels Tried: 24-hwe/stable, 24/stable, 24.10/stable
  Issue: aplay -l reports "no sound card found"; only "Dummy output" is listed in Audio settings.
  Observation: Audio works correctly in a live session of Ubuntu 24.04.1 LTS.

  Listing audio devices:

  $ aplay -l
  aplay: device_list:277: no soundcards found...

  Relevant lspci Output:

  00:1f.3 Multimedia audio controller [0401]: Intel Corporation Meteor Lake-P HD Audio Controller [8086:7e28] (rev 20)
  Subsystem: Hewlett-Packard Company Meteor Lake-P HD Audio Controller [103c:8c26]
  Kernel driver in use: sof-audio-pci-intel-mtl
  Kernel modules: snd_hda_intel, snd_sof_pci_intel_mtl

  Additional Notes:

  Could the issue be related to missing kernel drivers or modules, such as firmware-sof-signed?
  Reference: https://packages.ubuntu.com/noble/firmware-sof-signed

  Please let me know if additional details, logs, or steps are required.

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: linux-image-6.8.0-50-generic (not installed)
  ProcVersionSignature: Ubuntu 6.8.0-50.51-generic 6.8.12
  Uname: Linux 6.8.0-50-generic x86_64
  ApportVersion: 2.28.1-0ubuntu3.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/seq:        kihen      3216 F.... pipewire
  CRDA: N/A
  CasperMD5CheckResult: unknown
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Dec 22 20:09:17 2024
  MachineType: HP HP EliteBook 840 14 inch G11 Notebook PC
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=xterm-256color
   XDG_RUNTIME_DIR=<set>
  ProcFB:
   0 simpledrmdrmfb
   1 i915drmfb
  ProcKernelCmdLine: snapd_recovery_mode=run console=ttyS0,115200n8 console=tty1 panic=-1 quiet splash
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-6.8.0-50-generic N/A
   linux-backports-modules-6.8.0-50-generic  N/A
   linux-firmware                            N/A
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  WifiSyslog:
   
  dmi.bios.date: 06/20/2024
  dmi.bios.release: 2.6
  dmi.bios.vendor: HP
  dmi.bios.version: W70 Ver. 01.02.06
  dmi.board.name: 8C26
  dmi.board.vendor: HP
  dmi.board.version: KBC Version 02.43.50
  dmi.chassis.type: 10
  dmi.chassis.vendor: HP
  dmi.ec.firmware.release: 2.67
  dmi.modalias: dmi:bvnHP:bvrW70Ver.01.02.06:bd06/20/2024:br2.6:efr2.67:svnHP:pnHPEliteBook84014inchG11NotebookPC:pvrSBKPF:rvnHP:rn8C26:rvrKBCVersion02.43.50:cvnHP:ct10:cvr:sku8M4W7AV:
  dmi.product.family: 103C_5336AN HP EliteBook
  dmi.product.name: HP EliteBook 840 14 inch G11 Notebook PC
  dmi.product.sku: 8M4W7AV
  dmi.product.version: SBKPF
  dmi.sys.vendor: HP

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