Comment # 11 on bug 1220821 from Giacomo Comes

I'm reopening this bug report because the problem still exists.
Background:
Do a fresh leap 15.6 beta installation. Choose the plasma or gnome role.
Complete the installation and then run:
zypper in musescore, result:

Problem: the to be installed musescore-4.2.1-bp156.1.2.x86_64 requires
'(pipewire-alsa if pipewire)', but this requirement cannot be provided
  not installable providers: pipewire-alsa-1.0.4-150600.1.6.x86_64[disk_v_oss]
                  
pipewire-alsa-1.0.4-150600.2.pm.29.x86_64[packman_disk_Essentials]
 Solution 1: Following actions will be done:
  deinstallation of pipewire-1.0.4-150600.1.6.x86_64
  deinstallation of pipewire-lang-1.0.4-150600.1.6.noarch
  deinstallation of plasma5-session-wayland-5.27.11-bp156.1.4.x86_64
  deinstallation of wireplumber-0.5.1-150600.1.1.x86_64
  deinstallation of wireplumber-lang-0.5.1-150600.1.1.noarch
 Solution 2: Following actions will be done:
  deinstallation of alsa-plugins-pulse-1.2.7.1-150500.1.1.x86_64
  deinstallation of pulseaudio-17.0-150600.2.2.x86_64
  deinstallation of pulseaudio-lang-17.0-150600.2.2.noarch
  deinstallation of pulseaudio-module-bluetooth-17.0-150600.2.2.x86_64
  deinstallation of pulseaudio-module-gsettings-17.0-150600.2.2.x86_64
  deinstallation of pulseaudio-module-x11-17.0-150600.2.2.x86_64
  deinstallation of pulseaudio-module-zeroconf-17.0-150600.2.2.x86_64
 Solution 3: do not install musescore-4.2.1-bp156.1.2.x86_64
 Solution 4: break musescore-4.2.1-bp156.1.2.x86_64 by ignoring some of its
dependencies

The musescore specfile contains:
Requires:       ( alsa-plugins-pulse if pulseaudio )
Requires:       ( pipewire-alsa      if pipewire )

So
if pulseaudio is installed, install alsa-plugins-pulse
if pipewire is installed, install pipewire-alsa
It is assumed that both pulseaudio and pipewire are not installed at the same
time otherwise both alsa-plugins-pulse and pipewire-alsa would be installed
which is not possible because they conflict with each other.

That's exactly what is happening with the fresh installation:
You got installed pulseaudio, alsa-plugins-pulse and pipewire.
musescore then wants to install pipewire-alsa causing the resolution dilemma.

In tumbleweed this does not happens because after a fresh installation you
have:
pipewire and pipewire-alsa installed but not pulseaudio.

The problem with leap 15.6 seems to be that you end up with both pulseaudio and
pipewire installed. Is that configuration allowed?