debcrafters-packages team mailing list archive

[Reuben Firmin <2115334@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

  After system boot, USB audio devices using the C-Media Electronics USB Audio Device (vendor ID 0d8c, product ID 0012) are detected by
  the kernel and appear in /proc/asound/cards and arecord -l output, but fail to function for audio recording. The device reports
  "Sample format non available" errors when attempting to record, despite showing correct hardware parameters.

  The issue is resolved by physically unplugging and replugging the USB device, after which recording works normally with the same
  hardware parameters.

  Steps to reproduce:
  1. Connect C-Media USB Audio Device (ID 0d8c:0012)
  2. Boot system
  3. Run: arecord -D hw:X,0 -d 2 -f S16_LE -c 1 -r 44100 test.wav (where X is the device card number)
  4. Observe "Sample format non available" error
  5. Unplug and replug USB device
  6. Repeat step 3 - recording now works

  Expected behavior: USB audio device should be fully functional
immediately after boot without requiring physical reset.

  System: Ubuntu 25.04, kernel appears to properly detect device but USB
audio driver initialization fails on first boot.

ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: alsa-utils 1.2.13-1ubuntu1
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
CasperMD5CheckResult: pass
CurrentDesktop: KDE
Date: Wed Jun 25 05:02:12 2025
InstallationDate: Installed on 2022-10-12 (987 days ago)
InstallationMedia: Kubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
SourcePackage: alsa-utils
UpgradeStatus: Upgraded to plucky on 2025-05-13 (43 days ago)

** Affects: alsa-utils (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug plucky wayland-session

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https://bugs.launchpad.net/bugs/2115334

Title:
   USB Audio Device (C-Media 0d8c:0012) requires unplug/replug cycle
  after boot to function properly

Status in alsa-utils package in Ubuntu:
  New

Bug description:
    After system boot, USB audio devices using the C-Media Electronics USB Audio Device (vendor ID 0d8c, product ID 0012) are detected by
    the kernel and appear in /proc/asound/cards and arecord -l output, but fail to function for audio recording. The device reports
    "Sample format non available" errors when attempting to record, despite showing correct hardware parameters.

    The issue is resolved by physically unplugging and replugging the USB device, after which recording works normally with the same
    hardware parameters.

    Steps to reproduce:
    1. Connect C-Media USB Audio Device (ID 0d8c:0012)
    2. Boot system
    3. Run: arecord -D hw:X,0 -d 2 -f S16_LE -c 1 -r 44100 test.wav (where X is the device card number)
    4. Observe "Sample format non available" error
    5. Unplug and replug USB device
    6. Repeat step 3 - recording now works

    Expected behavior: USB audio device should be fully functional
  immediately after boot without requiring physical reset.

    System: Ubuntu 25.04, kernel appears to properly detect device but
  USB audio driver initialization fails on first boot.

  ProblemType: Bug
  DistroRelease: Ubuntu 25.04
  Package: alsa-utils 1.2.13-1ubuntu1
  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
  CasperMD5CheckResult: pass
  CurrentDesktop: KDE
  Date: Wed Jun 25 05:02:12 2025
  InstallationDate: Installed on 2022-10-12 (987 days ago)
  InstallationMedia: Kubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1)
  SourcePackage: alsa-utils
  UpgradeStatus: Upgraded to plucky on 2025-05-13 (43 days ago)

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