After playing around with gconf, dconf, xfconf for a long time I ended up getting my 16.04 system to reproduce this problem, which is not really what I expected at all. I'm still not 100% sure what is going on but I think I am comfortable with recommending to set the /Net/FallbackIconTheme key by default to "gnome", for the following reason.
I found this commit: https://github.com/GNOME/gtk/commit/a093cd2a22173369424878eb6d8c38124e7aa1f9 This is the commit I mentioned above which hard codes a (undocumented) check to "gnome" icon theme in Gtk+3. Note what the comment says: "This is what we used to get through the Net/FallbackIcontheme setting. Nobody has ever set this setting to a different value, and people have come to rely on GTK+ applications getting their icons this way." Well, currently, Xubuntu does set this differently - by not setting it at all. I have looked everywhere and this seems to be the only setting that controls the fallback icon theme in Gtk+2. Note that Gtk+3 apps don't just have this setting by default. They are hard coded to check "gnome" regardless of the value of this setting. So by setting it we would make our Gtk+2 apps behave a tiny bit more like Gtk+3 apps. (And I won't have broken icons in my menus. :) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1756187 Title: Some icon themes have missing icons due to missing fallback setting. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xubuntu-meta/+bug/1756187/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
