After latest updates (including libadwaita 1.4.0 rc) dark mode is not working anymore on my system, switching to dark mode doesn’t do anything and apps keeps the light mode, do you have any hints to triage this and help me to open a bug report to the relevant project?
I have also run into this. It seems to affect everything but the wallpaper, which changes to the dark mode wallpaper just fine, and GTK3 apps, which seem to follow the theme. Or maybe I messed up something, I don’t know.
Several apps are still completely bright in dark style, such as FileZilla, Gnote, Grsync, Rhythmbox, Sudoku. Some others have only dark title bars, such as Kigo, KolourPaint, Okular, qBittorrent, SciDAVis, TeXstudio.
I confirm that, since Fedora 39 and in Fedora 40 up to now, legacy apps like Rhythmbox and AisleRiot Solitaire are not styled in Dark when this style is selected in Gnome Settings.
In the meantime, as already mentioned previously in this thread, using adw-gtk3 in Tweaks solves the issue.
I am on Fedora workstation 39 and Rhythmbox is shown in dark theme.
BUT I have installed “gnome-themes-extra” and then I have selected “adwaita dark” from “gnome settings” (it is the legacy dark theme, not the dark version of the current gnome theme).