[Pkg-alsa-devel] Bug#1110637: alsa-ucm-conf: Focusrite Scarlett 18i20 support breaks in alsa-ucm-conf 1.2.14 (shipped with Trixie)

[Esther Weidauer]

Reverting the changes introduce with commit 7283759 in alsa-ucm-conf 
(https://github.com/alsa-project/alsa-ucm-conf/commit/7283759a381ca1fc2589da213daa05f9d3b84aac) 
on my system has restored function to the audio interface, including the 
correct pipewire graph.

It really just seems to be that one commit causing this problem.

I don't know how to produce patched deb packages so I could only do it 
manually for now.

Cheers

Esther Weidauer
esther at selfawaresoup.com

pronouns: she/her
languages: english/german

On 8/9/25 14:23, Esther Weidauer wrote:
> Package: alsa-ucm-conf
> Version: 1.2.14-1
> Severity: important
>
> Dear Maintainer,
>
> alsa-ucm-conf 1.2.14 introduced an issue where support for the Focusrite
> Scarlett 18i20 audio interface was broken. The issue is described 
> here: https://github.com/alsa-project/alsa-ucm-conf/issues/559
>
> alsa-ucm-conf 1.2.14 ships with Debian Trixie, breaking those audio 
> interfaces
> after the upgrade from Bookworm to Trixie.
>
> Currently the audio interface is not correctly recognized and audio
> playback impossible. I did not test recording but I assume that's
> affected too.
>
> Best regards
>
> -- System Information:
> Debian Release: 13.0
> APT prefers testing-security
> APT policy: (500, 'testing-security'), (500, 'testing')
> Architecture: amd64 (x86_64)
> Foreign Architectures: i386
>
> Kernel: Linux 6.12.38+deb13-amd64 (SMP w/24 CPU threads; PREEMPT)
> Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) 
> (ignored: LC_ALL set to en_US.UTF-8), LANGUAGE=en
> Shell: /bin/sh linked to /usr/bin/dash
> Init: systemd (via /run/systemd/system)
> LSM: AppArmor: enabled
>
> Versions of packages alsa-ucm-conf depends on:
> ii libasound2t64 1.2.14-1
>
> alsa-ucm-conf recommends no packages.
>
> alsa-ucm-conf suggests no packages.
>
> -- no debconf information
>