Scrolling down on tray icon: volume goes down only very slowly

[harryharryharry]

When I try to lower the volume by scrolling downwards on the tray icon (in xfce) the volume goes down only slightly and only when I scroll real fast. This issue is not apparent when scrolling up on the tray icon and scrolling on the volume icon in sonata itself works both ways.
(I'm on fedora 28 and cloned the master branch)

[multani]

This might be related to https://bugzilla.gnome.org/show_bug.cgi?id=693664

[harryharryharry]

Thanks for the fast reply! That looks like a pretty old bug that (to my layman's eyes) has yet to be addressed. It is a pretty small hindrance to me, but is there something I can do to test if it is indeed due to this bug?

[multani]

There's a test script in the bug report (which needs either pygtk or python3 gobject-introspection) that shows the problem.
Let me know what you get!

[harryharryharry]

Oops must've overlooked the test script, sorry.
I'm getting:

Using GObject Introspection
./test.py:7: PyGIWarning: Gtk was imported without specifying a version first. Use gi.require_version('Gtk', '3.0') before import to ensure that the right version gets loaded.
  from gi.repository import Gtk

The script doesn't quit after this warning. I've tried adding:

import gi
gi.require_version('Gtk', '3.0') 

But that only hides the warning. Nothing appears in the system tray when running the script. I'm not really familiar with python, but shouldn't the script show a test tray icon to scroll over ?

[multani]

You can add a icon by replacing Gtk.StatusIcon() by something like Gtk.StatusIcon.new_from_icon_name("stock_folder") I suppose.

[harryharryharry]

Scrolling upwards on the test icon gives me:

<enum GDK_SCROLL_UP of type Gdk.ScrollDirection>
<enum GDK_SCROLL_UP of type Gdk.ScrollDirection>

Scrolling downwards gives me:

<enum GDK_SCROLL_UP of type Gdk.ScrollDirection>
<enum GDK_SCROLL_DOWN of type Gdk.ScrollDirection>