WAYLAND_DISPLAY=wayland-1 WAYLAND_DEBUG=1 gst-launch-1.0 -v videotestsrc ! waylandsink
Setting pipeline to PAUSED ...                                         
[407025.102]  -> wl_display@1.get_registry(new id wl_registry@2)       
[407025.133]  -> wl_display@1.sync(new id wl_callback@3)               
[407025.272] wl_display@1.delete_id(3)                                 
[407025.295] wl_registry@2.global(1, "wl_drm", 2)                      
[407025.334] wl_registry@2.global(2, "wl_compositor", 4)               
[407025.349]  -> wl_registry@2.bind(2, "wl_compositor", 3, new id [unknown]@4)                                                                
[407025.368] wl_registry@2.global(3, "wl_shm", 1)                      
[407025.393]  -> wl_registry@2.bind(3, "wl_shm", 1, new id [unknown]@5)                                                                       
[407025.408] wl_registry@2.global(4, "wl_output", 2)                   
[407025.418] wl_registry@2.global(5, "wl_data_device_manager", 3)      
[407025.437] wl_registry@2.global(6, "gtk_primary_selection_device_manager", 1)                                                               
[407025.453] wl_registry@2.global(7, "zxdg_shell_v6", 1)               
[407025.471] wl_registry@2.global(8, "wl_shell", 1)                    
[407025.485]  -> wl_registry@2.bind(8, "wl_shell", 1, new id [unknown]@6)                                                                     
[407025.504] wl_registry@2.global(9, "gtk_shell1", 1)                  
[407025.525] wl_registry@2.global(10, "wl_subcompositor", 1)           
[407025.539]  -> wl_registry@2.bind(10, "wl_subcompositor", 1, new id [unknown]@7)                                                            
[407025.559] wl_registry@2.global(11, "zwp_pointer_gestures_v1", 1)    
[407025.573] wl_registry@2.global(12, "zwp_tablet_manager_v2", 1)      
[407025.585] wl_registry@2.global(13, "wl_seat", 5)                    
[407025.601] wl_registry@2.global(14, "zwp_pointer_constraints_v1", 1) 
[407025.616] wl_registry@2.global(15, "zxdg_exporter_v1", 1)           
[407025.632] wl_registry@2.global(16, "zxdg_importer_v1", 1)           
[407025.651] wl_registry@2.global(17, "zwp_linux_dmabuf_v1", 3)        
[407025.668]  -> wl_registry@2.bind(17, "zwp_linux_dmabuf_v1", 1, new id [unknown]@8)                                                         
[407025.693] wl_registry@2.global(18, "zwp_keyboard_shortcuts_inhibit_manager_v1", 1)                                                         
[407025.705] wl_callback@3.done(0)                                     
[407025.717]  -> wl_display@1.sync(new id wl_callback@3)               
[407025.820] wl_display@1.delete_id(3)                                 
[407025.835] wl_shm@5.format(0)                                        
[407025.844] wl_shm@5.format(1)                                        
[407025.861] zwp_linux_dmabuf_v1@8.modifier(875713089, 0, 0)           
listener function for opcode 1 of zwp_linux_dmabuf_v1 is NULL          
zsh: abort (core dumped)
