Mageia forum

Okay, for starters, a personal confession: I think Plasma 5's default Breeze theme is gawdawful, so within minutes after logging into Mageia 6 for the first time I wanted to go straight back to cheery old Oxygen. For KDE apps inside Plasma 5 itself, that was no problem, but getting my various GTK2 tools to look right proved a bit more of an uphill battle. Despite having the oxygen-gtk package installed and the GUI and menus looking correct for the most part, the icons refused to switch from anything but Adwaita — regardless of what I selected on the Widget Style of GNOME/GTK Applications panel in System Settings.

It took some time, but by pure fluke, I found a completely bizarro workaround, so here it is:

1. Make sure you've installed oxygen-gtk-1.4.6-3.mga6
2. As root navigate to /usr/share/themes/oxygen-gtk/gtk-2.0/
3. Move or rename the icons4 file somewhere else or to something else (I renamed mine to icons4.broken) — I suppose you could even delete it outright...
4. Create a new, emtpy (touch will do) icons4 file

That's it. You're done. Now you can set whatever icons you like for your GTK2 Oxygen theme in System Settings. I have no idea why this works, but I'm guessing all that code in the original icons4 file overrides setting the theme correctly.

Credit goes to Renan for discovering this back in 2013 (while, ironically in his case, trying to prevent Oxygen from locking itself as the default icon style). Here's his original Unix StackExchange thread.

Thanks for sharing
You may want to report that so that either it can be fixed for oxygen-gtk or for adwaita itself, if that's possible.
Then please report that as a bug, after searching if it hasn't been reported yet already: https://wiki.mageia.org/en/How_to_report_a_bug_properly
For completeness's sake and also to allow others to follow up on that bug report, please also post the link to it here in the thread, thanks.

Is there an Oxygen style for GTK 3 too? I have the same misgivings about Breeze, but the latest versions of Firefox and LibreOffice seem to use GTK 3, and the Oxygen style for GTK 2 makes no difference.