zwp_linux_dmabuf_v1 support not working?
I see that zwp_linux_dmabuf_v1 support was added in b7b5fb29.
gstreamer's waylandsink reports: ** (lt-gtkwaylandsink:4595): WARNING **: 20:36:59.758: Could not bind to zwp_linux_dmabuf_v1
This seems to be reported if either the registry handler is never called with interface of zwp_linux_dmabuf_v1, or wl_registry_bind() fails somehow. (See https://github.com/GStreamer/gst-plugins-bad/blob/master/ext/wayland/wldisplay.c#L234)
I am using mutter 3.28.2 on Fedora 28.