#1153237 linux-image-6.12.115+deb13-amd64: snd-usb-audio - total loss of audio output to focusrite scarlett 18i20

Package:
src:linux
Source:
src:linux
Submitter:
Rob.U.
Date:
2026-11-07 17:21:10 UTC
Severity:
normal
Tags:
#1153237#5
Date:
2026-11-06 15:16:41 UTC
From:
To:
Dear Maintainer,

- Problem
  - Loss of audio output after upgrade to kernel 6.12.115. Audio input still works.

- Hardware
  - AMD 9900X / AMD RX9070 / 64GB
  - Focusrite Scarlett 18i20 Gen 3 USB.

- Troubleshooting
  - Attempted to send audio directly to the card using aplay and speaker-test but without success. Checked Pipewire/Wireplumber config, found no issues. After resolution (below), the diagnostic commands worked as expected.

- Resolution
  - Revert to kernel 6.12.113, audio playback is immediately restored.

- Expected outcome
 - Audio output after upgrade to 6.12.115

#1153237#10
Date:
2026-11-06 17:00:30 UTC
From:
To:
Hi Rob,

Please check existing reports before filling, this avoids much
dedublication work. This is #1152888, I'm merging both reports.

Regards,
Salvatore

#1153237#29
Date:
2026-11-06 21:12:09 UTC
From:
To:
Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
I upgraded Debian and the kernel version 115 blocked the sound on my UR22 soundcard to work properly
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
I switched the output of the audio to another source (like my bluetooth headset) and the sound was back. I also used GRUP to reboot on the older version of the kernel ad the sound was back

   * What was the outcome of this action?
Sound was working again
   * What outcome did you expect instead?

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