Ubuntu
gnome-settings-daemon package

  1. Bug #1248368
  2. Comment #19

Comment 19 for bug 1248368

Revision history for this message
Russell King (rmk+ubuntu) wrote :

It seems that 64_micmute.patch is the culpret... this patch adds support for the microphone mute button, which is fine if you have an input stream. If you don't have an input stream, the side effect of this patch is to disable _all_ the buttons, including the ones affecting output volume - see this hunk:

@@ -1203,13 +1256,18 @@
                 stream = manager->priv->stream;
         if (stream == NULL)
                 return;
+ input_stream = manager->priv->input_stream;
+ if (input_stream == NULL)
+ return;

Fixing this resolves the issue for me.