In openQA, we have a test where we check the volume icon at the top right in GNOME correctly reflects changes to the volume levels. The test works by running commands like this:

amixer -D pipewire sset Master 0%

and then checking the volume icon changed as expected.

This worked fine until Fedora-Rawhide-20260402.n.0 , where it stopped working. The only relevant package I can see in the changelog for that compose is wireplumber:

Package:      wireplumber-0.5.14-1.fc45
Old package:  wireplumber-0.5.13-1.fc44

so I'm filing against that.

When the test worked, the output of the command looked like this:

Simple mixer control 'Master',0
  Capabilities: pvolume pswitch pswitch-joined
  Playback channels: Front Left - Front Right
  Limits: Playback 0 - 65536
  Mono:
  Front Left: Playback 0 [0%] [on]
  Front Right: Playback 0 [0%] [on]

and the icon changed to a speaker with an 'x' next to it, as expected.

Now the test is failing, the output of the command looks slightly different:

Simple mixer control 'Master',0
  Capabilities: pvolume pvolume-joined pswitch pswitch-joined
  Playback channels: Mono
  Limits: Playback 0 - 65536
  Mono: Playback 0 [0%] [on]

and the panel icon does not change, it continues to show an 'active' speaker icon indicating about 50% volume.

Is this a bug in wireplumber? Bug in GNOME? Do we need to change the command openQA runs? Thanks!