[Wayland-bugs] [Bug 792889] New: GTK3 applications started on kwin_wayland with GDK_BACKEND=wayland are not preferring server-side decorations like they should be

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=792889

            Bug ID: 792889
           Summary: GTK3 applications started on kwin_wayland with
                    GDK_BACKEND=wayland are not preferring server-side
                    decorations like they should be
    Classification: Platform
           Product: gtk+
           Version: 3.22.x
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: Backend: Wayland
          Assignee: gtk-bugs at gtk.org
          Reporter: kyle.devir at mykolab.com
        QA Contact: gtk-bugs at gtk.org
                CC: rob at robster.org.uk, wayland-bugs at lists.freedesktop.org
     GNOME version: ---

With the added support for GTK3 applications to prefer server-side decorations
when detecting that they're running on KWin on Wayland, the expected behaviour
is that they should be using server-side decorations, as per this commit and
related, resolved bug report:

https://github.com/GNOME/gtk/commit/1b279e3d4ac33ebd9a3925d1a388c28bd96232d5

https://bugzilla.gnome.org/show_bug.cgi?id=781909

However, the detection doesn't seem to be working.

On the KDE side, I've made a bug report here:

https://bugs.kde.org/show_bug.cgi?id=389361

According to the feedback from Martin, and my own subsequent testing, GTK3
applications are always asking for CSD, suggesting they're not seeing KWin
being used as the Wayland environment.

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