Problems running Python GTK

[AlanGriffiths]

I'm seeing errors that I don't see with GNOME:

  File "/home/alan/CLionProjects/mir-ci/frame/clients/drag_and_drop_demo.py", line 84, in add_item
    pixbuf = Gtk.IconTheme.get_default().load_icon(icon_name, 16, 0)
gi.repository.GLib.GError: gtk-icon-theme-error-quark: Icon 'help-about' not present in theme Adwaita (0)

[AlanGriffiths]

This has the feel of being about dbus activation. On GNOME I see the following activations:

$ dbus-run-session python clients/drag_and_drop_demo.py 
dbus-daemon[1471499]: [session uid=1000 pid=1471499] Activating service name='org.a11y.Bus' requested by ':1.1' (uid=1000 pid=1471500 comm="python clients/drag_and_drop_demo.py " label="snap.clion.clion (complain)")
dbus-daemon[1471499]: [session uid=1000 pid=1471499] Successfully activated service 'org.a11y.Bus'
dbus-daemon[1471499]: [session uid=1000 pid=1471499] Activating service name='org.gtk.vfs.Daemon' requested by ':1.0' (uid=1000 pid=1471500 comm="python clients/drag_and_drop_demo.py " label="snap.clion.clion (complain)")
dbus-daemon[1471499]: [session uid=1000 pid=1471499] Successfully activated service 'org.gtk.vfs.Daemon'
fusermount3: failed to access mountpoint /run/user/1000/gvfs: Permission denied
dbus-daemon[1471524]: Activating service name='org.a11y.atspi.Registry' requested by ':1.0' (uid=1000 pid=1471500 comm="python clients/drag_and_drop_demo.py " label="snap.clion.clion (complain)")
dbus-daemon[1471524]: Successfully activated service 'org.a11y.atspi.Registry'
SpiRegistry daemon is running with well-known name - org.a11y.atspi.Registry

On Miriway:

$ dbus-run-session python clients/drag_and_drop_demo.py 
dbus-daemon[1476576]: [session uid=1000 pid=1476576] Activating service name='org.gtk.vfs.Daemon' requested by ':1.0' (uid=1000 pid=1476577 comm="python clients/drag_and_drop_demo.py " label="snap.miriway.miriway (complain)")
dbus-daemon[1476576]: [session uid=1000 pid=1476576] Successfully activated service 'org.gtk.vfs.Daemon'
fusermount3: failed to access mountpoint /run/user/1000/gvfs: Permission denied

and then the stack trace

[AlanGriffiths]

On further investigation, NO_AT_BRIDGE=1 in the Miriway session is what causes the different activations. But that doesn't stop the app running on GNOME

[AlanGriffiths]

Hmm, "Adwaita" does indeed not contain "help-about", and nor does "hicolor" (which index.theme says it "Inherits").

So I understand why it doesn't work on Miriway. But not why it works running on GNOME.

[AlanGriffiths]

Of course! On GNOME the default theme is Yaru (which has the desired icon)

[AlanGriffiths]

So, there's a possible issue in my understanding of theme setting (e.g. GDK_THEME=Yaru python clients/drag_and_drop_demo.py doesn't work), but this specific problem isn't really something that Miriway should fix