https://gitlab.freedesktop.org/pipewire/pipewire/-/commit/916f1cdfbfdc414d83031aef941a9909d1e603bd

From 916f1cdfbfdc414d83031aef941a9909d1e603bd Mon Sep 17 00:00:00 2001
From: Wim Taymans <wtaymans@redhat.com>
Date: Fri, 14 Apr 2023 16:32:18 +0200
Subject: [PATCH] Revert "alsa-mixer: allow to re-attach the mixer control
 element"

This reverts commit b554fc20e9ff97064721c89eb15b1b45870584e5.
--- a/spa/plugins/alsa/acp/alsa-util.c
+++ b/spa/plugins/alsa/acp/alsa-util.c
@@ -1648,20 +1648,12 @@ static int mixer_class_event(snd_mixer_class_t *class, unsigned int mask,
     } else if (mask & SND_CTL_EVENT_MASK_ADD) {
         snd_ctl_elem_iface_t iface = snd_hctl_elem_get_interface(helem);
         if (iface == SND_CTL_ELEM_IFACE_CARD || iface == SND_CTL_ELEM_IFACE_PCM) {
-            snd_mixer_t *mixer = snd_mixer_class_get_mixer(class);
-            snd_ctl_elem_iface_t iface = snd_hctl_elem_get_interface(helem);
-            const char *name = snd_hctl_elem_get_name(helem);
-            const int index = snd_hctl_elem_get_index(helem);
-            const int device = snd_hctl_elem_get_device(helem);
             snd_mixer_elem_t *new_melem;
 
-            new_melem = pa_alsa_mixer_find(mixer, iface, name, index, device);
-            if (!new_melem) {
-                /* Put the hctl pointer as our private data - it will be useful for callbacks */
-                if ((err = snd_mixer_elem_new(&new_melem, SND_MIXER_ELEM_PULSEAUDIO, 0, helem, NULL)) < 0) {
-                    pa_log_warn("snd_mixer_elem_new failed: %s", pa_alsa_strerror(err));
-                    return 0;
-                }
+            /* Put the hctl pointer as our private data - it will be useful for callbacks */
+            if ((err = snd_mixer_elem_new(&new_melem, SND_MIXER_ELEM_PULSEAUDIO, 0, helem, NULL)) < 0) {
+                pa_log_warn("snd_mixer_elem_new failed: %s", pa_alsa_strerror(err));
+                return 0;
             }
 
             if ((err = snd_mixer_elem_attach(new_melem, helem)) < 0) {
-- 
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