I've taken a look at this. The icon name in gnome-volume-control-
settings is set here in gnome-volume-control/src/gvc-mixer-control.c:
static void
set_icon_name_from_proplist (GvcMixerStream *stream,
pa_proplist *l,
const char *default_icon_name)
{
const char *t;
if ((t = pa_proplist_gets (l, PA_PROP_MEDIA_ICON_NAME))) {
goto finish;
}
if ((t = pa_proplist_gets (l, PA_PROP_WINDOW_ICON_NAME))) {
goto finish;
}
if ((t = pa_proplist_gets (l, PA_PROP_APPLICATION_ICON_NAME))) {
goto finish;
}
if ((t = pa_proplist_gets (l, PA_PROP_MEDIA_ROLE))) {
if (strcmp (t, "video") == 0 ||
strcmp (t, "phone") == 0) {
goto finish;
}
if (strcmp (t, "music") == 0) {
t = "audio";
goto finish;
}
if (strcmp (t, "game") == 0) {
t = "applications-games";
goto finish;
}
if (strcmp (t, "event") == 0) {
t = "dialog-information";
goto finish;
}
}
t = default_icon_name;
finish:
gvc_mixer_stream_set_icon_name (stream, t);
}
I tried reducing the priority of PA_PROP_MEDIA_ICON_NAME below
PA_PROP_WINDOW_ICON_NAME and PA_PROP_APPLICATION_ICON_NAME, thinking
that was where the current icon name for the stream was coming from, but
that didn't work.
I then built it with some g_debug's in to try and work out what was
going on, and it seems that PA_PROP_MEDIA_ICON_NAME,
PA_PROP_WINDOW_ICON_NAME and PA_PROP_APPLICATION_ICON_NAME are always
empty for every stream, and the icon always comes from
PA_PROP_MEDIA_ROLE. According to the Pusleaudio documentaion,
PA_PROP_MEDIA_ROLE will only be one of the following values: "video",
"music", "game", "event", "phone", "animation", "production", "a11y".
So, I think that as a temporary solution the icon theme should be
modified to contain these icons. Suitable icons likely already exist in
the theme. Other than that, I think this is more likely a bug (or
limitation) of Pulseaudio.
What do you think Sebastien?
--
gnome-volume-control-settings: no application icon
https://bugs.launchpad.net/bugs/347005
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