Transparent Titlebars under XWayland Since Libadwaita Update

[LSeelig]

Prerequisites

• [X] I performed a cursory search of the issue tracker to avoid opening a duplicate issue.

Checklist to make sure the issue is not on your end

• [X] I have made sure that I do not have multiple versions of the theme installed. Only one version should be installed in either ~/.local/share/themes or /usr/share/themes or ~/.themes
• [X] The file ~/.config/gtk-3.0/gtk.css does not exist. (If it does, backup and remove it.)
• [X] I have logged out and in again.
• [ ] Dark theme only. I have enabled adw-gtk3-dark in gnome-tweaks AND set the appearance to dark in gnome-control-center
• [ ] The flatpak theme is installed org.gtk.Gtk3theme.adw-gtk3 and org.gtk.Gtk3theme.adw-gtk3-dark
• [ ] The app I'm having an issue with is an actual GTK3 app and is not coded using another toolkit like GTK2, GTK4, QT, etc.
• [ ] I have created a new user profile without any modifications except adw-gtk3.

Description

There is a regression from the latest commit 91aac01e4f4bfbbe233cf7f4bb7a8e4cff73bc5f that I pulled from git. On xwayland apps (or at least those requesting SSD), the titlebar becomes invisible, save for the text and the icons. I think this is caused by something in the new libadwaita release that the commit retrieved. Checking out the previous commit and reinstalling fixed the problem.

NOTE: I tested it with the original version, not my soft fork, though that is where I initially discovered it.

OS and version [e.g Fedora 37]

Fedora 40

Adw-gtk3 version. Also specify your installation source. [e.g tar.xz, AUR, git main branch]

git main branch

GNOME version

46

Application name and version (If the issue is with an app.)

Calibre, Bitwarden

[lassekongo83]

I assume it's because GTK 4.16 support new color variables which aren't supported in older versions. Unless you're on bleeding edge like Tumbleweed I'd advise against using the main branch.

[LSeelig]

I assume it's because GTK 4.16 support new color variables which aren't supported in older versions. Unless you're on bleeding edge like Tumbleweed I'd advise against using the main branch.

Understood; thank you.

[Lenni-builder]

I can replicate this with v5.5 and v5.4 from releases (the tar.gz file) on Ultramarine Linux 40 (Fedora 40):

The title bars are rendered fine on 5.3. Just stay on this version until Fedora updates to GTK 4.16 (It's currently on 4.14):

❯ rpm -qa | grep gtk4-4
gtk4-4.14.5-1.fc40.x86_64

The 5.4 release notes even state that you should only use it with GTK 4.16 and newer:

Avoid this release if your GTK version is older than GTK 4.16!