Package: libgtk-4-1
Version: 4.18.6+ds-2
Severity: normal
Tags: patch upstream

Dear Maintainer,


When using COSMIC Dekstop on Debian 13, I found that all apps crash after compiling a version after the following:

https://github.com/pop-os/cosmic-
comp/commit/091583ac84abac02967ae358cf9570ddfef63b31 (backend: Support wl-dmabuf v6)

Debugging showed that the gtk-4 version included in Debian 13 (4.18.6) announced support for versions higher than 5 while it does not seem to implement what is needed for proper v6 support.

patching gtk4 to only announce v5 support fixes the problem.

A patch is attached.


-- System Information:
Debian Release: 13.6
  APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 7.1.3+deb13-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages libgtk-4-1 depends on:
ii  adwaita-icon-theme            48.1-1
ii  hicolor-icon-theme            0.18-2
ii  libc6                         2.41-12+deb13u3
ii  libcairo-gobject2             1.18.4-1+b1
ii  libcairo-script-interpreter2  1.18.4-1+b1
ii  libcairo2                     1.18.4-1+b1
ii  libcloudproviders0            0.3.6-2
ii  libcolord2                    1.4.7-3
ii  libcups2t64                   2.4.10-3+deb13u2
ii  libepoxy0                     1.5.10-2
ii  libfontconfig1                2.15.0-2.3
ii  libfribidi0                   1.0.16-1
ii  libgdk-pixbuf-2.0-0           2.42.12+dfsg-4+deb13u1
ii  libgles2                      1.7.0-1+b2
ii  libglib2.0-0t64               2.84.4-3~deb13u3
ii  libgraphene-1.0-0             1.10.8-5
ii  libgtk-4-common               4.18.6+ds-2
ii  libharfbuzz-subset0           10.2.0-1+deb13u1
ii  libharfbuzz0b                 10.2.0-1+deb13u1
ii  libjpeg62-turbo               1:2.1.5-4
ii  libpango-1.0-0                1.56.3-1
ii  libpangocairo-1.0-0           1.56.3-1
ii  libpangoft2-1.0-0             1.56.3-1
ii  libpng16-16t64                1.6.48-1+deb13u5
ii  libtiff6                      4.7.0-3+deb13u3
ii  libvulkan1                    1.4.309.0-1
ii  libwayland-client0            1.23.1-3
ii  libwayland-egl1               1.23.1-3
ii  libx11-6                      2:1.8.12-1
ii  libxcursor1                   1:1.2.3-1
ii  libxdamage1                   1:1.1.6-1+b2
ii  libxext6                      2:1.3.4-1+b3
ii  libxfixes3                    1:6.0.0-2+b4
ii  libxi6                        2:1.8.2-1
ii  libxinerama1                  2:1.1.4-3+b4
ii  libxkbcommon0                 1.7.0-2
ii  libxrandr2                    2:1.5.4-1+b3
ii  shared-mime-info              2.4-5+b2

Versions of packages libgtk-4-1 recommends:
ii  iso-codes                 4.18.0-1
ii  libgtk-4-bin              4.18.6+ds-2
ii  libgtk-4-media-gstreamer  4.18.6+ds-2
ii  librsvg2-common           2.60.0+dfsg-1

Versions of packages libgtk-4-1 suggests:
ii  gvfs  1.57.2-2+deb13u1

Versions of packages libgtk-4-1 is related to:
ii  fcitx5-frontend-gtk4  5.1.3-3
ii  ibus-gtk4             1.5.32-2
pn  scim-gtk-immodule     <none>

-- no debconf information
--- gtk4-4.18.6+ds.orig/gdk/wayland/gdkdisplay-wayland.c
+++ gtk4-4.18.6+ds/gdk/wayland/gdkdisplay-wayland.c
@@ -367,7 +367,7 @@ gdk_registry_handle_global (void
       struct zwp_linux_dmabuf_feedback_v1 *feedback;
 
       display_wayland->linux_dmabuf =
-        wl_registry_bind (display_wayland->wl_registry, id, &zwp_linux_dmabuf_v1_interface, version);
+        wl_registry_bind (display_wayland->wl_registry, id, &zwp_linux_dmabuf_v1_interface, MIN (version, 5));
       feedback = zwp_linux_dmabuf_v1_get_default_feedback (display_wayland->linux_dmabuf);
       display_wayland->dmabuf_formats_info = dmabuf_formats_info_new (GDK_DISPLAY (display_wayland),
                                                                       "default",

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