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Bug#1152888:

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Hello,

I would like to report that the same regression also affects my MOTU
M2 USB audio interface on Debian 13 stable.

My MOTU M2 works correctly with kernel:

	*
6.12.111+deb13-amd64

But audio playback fails with:

	*
6.12.115+deb13.1-amd64

The issue persists when using a different USB port.

The device is detected correctly by USB and ALSA:

	*
USB ID: 07fd:000b

	*
ALSA identifies the device as M2 USB-Audio.

With PipeWire stopped, running:

speaker-test -D hw:3,0 -c 2 -r 48000 -F S32_LE -t sine -f 440 -l 5

fails with:

Write error: -5, Input/output error

No sound is produced and the interface's level meters show no
activity.

Booting again with kernel 6.12.111 restores normal audio playback.

This suggests that the regression also affects the MOTU M2, not only
the M4.

Thank you.

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Thread

Bug#1152888: Regression: MOTU M4 USB audio playback fails with EIO on Linux 6.12.115 (works on 6.12.113) Benjamin Scherrer <benjamin@wagnerbrutal.de> - 2026-11-02 22:20 +0100
  Processed: Re: Bug#1152888: Regression: MOTU M4 USB audio  playback fails with EIO on Linux 6.12.115 (works on 6.12.113) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-11-03 17:20 +0100
  Bug#1152888: Regression: MOTU M4 USB audio playback fails with EIO on Linux 6.12.115 (works on 6.12.113) Salvatore Bonaccorso <carnil@debian.org> - 2026-11-03 17:20 +0100
    Bug#1152888: Regression: MOTU M4 USB audio playback fails with EIO on Linux 6.12.115 (works on 6.12.113) Benjamin Scherrer <benjamin@wagnerbrutal.de> - 2026-11-03 23:50 +0100
  Bug#1152888: Regression: MOTU M4 USB audio playback fails with EIO on Linux 6.12.115 (works on 6.12.113) Sebastian Kiesel <sebastian-debian-reportbug@skiesel.de> - 2026-11-03 17:40 +0100
  Bug#1152888:  Michele Zelioli <michele.zelioli@ik.me> - 2026-11-03 21:50 +0100
  Bug#1152888: MOTU M2 also affected by 6.12.115 USB audio regression Christopher Ludwin <cjludwin@pm.me> - 2026-11-03 23:10 +0100
  Bug#1152888: Regression: MOTU M4 USB audio playback fails with  EIO on Linux 6.12.115 (works on 6.12.113) "smg" <smgdream@foxmail.com> - 2026-11-04 04:20 +0100
  Processed: Re: Bug#1152888: Regression: MOTU M4 USB audio  playback fails with EIO on Linux 6.12.115 (works on 6.12.113) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-11-04 06:00 +0100
  Bug#1152888: Regression: MOTU M4 USB audio playback fails with  EIO on Linux 6.12.115 (works on 6.12.113) "smg" <smgdream@foxmail.com> - 2026-11-04 16:20 +0100
  Bug#1152888: Regression: MOTU M4 USB audio playback fails with EIO on Linux 6.12.115 (works on 6.12.113) Benjamin Scherrer <benjamin@wagnerbrutal.de> - 2026-11-04 17:30 +0100
  Bug#1152888: Regression: MOTU M4 USB audio playback fails with EIO on Linux 6.12.115 (works on 6.12.113) Sebastian Kiesel <sebastian-debian-reportbug@skiesel.de> - 2026-11-04 18:50 +0100
  Processed: Re: Bug#1152888: Regression: MOTU M4 USB audio  playback fails with EIO on Linux 6.12.115 (works on 6.12.113) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-11-05 07:50 +0100

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