running elementary_test and selecting GlViewManyGears results in the following backtrace:
/usr/lib64/libeina.so.1 | ??/??: 0 @ _eina_semaphore_free() /usr/lib64/libeina.so.1 | ??/??: 0 @ eina_log_print_cb_stdout() /usr/lib64/libeina.so.1 | ??/??: 0 @ eina_log_print() /usr/lib64/libelementary.so.1 | ??/??: 0 @ elm_glview_render_func_set() /usr/lib64/libeo.so.1 | ??/??: 0 @ efl_finalize() /usr/lib64/libeo.so.1 | ??/??: 0 @ _efl_add_end() /usr/bin/elementary_test | ??/??: 0 @ efl_main() /usr/lib64/libeo.so.1 | ??/??: 0 @ efl_composite_part_is() /usr/lib64/libeo.so.1 | ??/??: 0 @ efl_event_callback_legacy_call() /usr/lib64/libeo.so.1 | ??/??: 0 @ efl_event_callback_legacy_call() /usr/lib64/libedje.so.1 | ??/??: 0 @ edje_shutdown() /usr/lib64/libedje.so.1 | ??/??: 0 @ edje_object_signal_callback_del_full() /usr/lib64/libedje.so.1 | ??/??: 0 @ edje_shutdown() /usr/lib64/libedje.so.1 | ??/??: 0 @ edje_obj_message_signal_process() /usr/lib64/libelementary.so.1 | ??/??: 0 @ elm_layout_signal_emit() /usr/lib64/libelementary.so.1 | ??/??: 0 @ elm_obj_widget_on_focus() /usr/lib64/libelementary.so.1 | ??/??: 0 @ elm_widget_content_part_unset() /usr/lib64/libelementary.so.1 | ??/??: 0 @ efl_ui_focus_object_focus_set() /usr/lib64/libelementary.so.1 | ??/??: 0 @ efl_ui_focus_manager_logical_end() /usr/lib64/libelementary.so.1 | ??/??: 0 @ efl_ui_focus_manager_focus() /usr/lib64/libelementary.so.1 | ??/??: 0 @ elm_interface_scrollable_mixin_get() /usr/lib64/libelementary.so.1 | ??/??: 0 @ efl_ui_focus_manager_focus() /usr/lib64/libelementary.so.1 | ??/??: 0 @ elm_obj_widget_focus_mouse_up_handle() /usr/lib64/libelementary.so.1 | ??/??: 0 @ elm_widget_content_part_unset() /usr/lib64/libevas.so.1 | ??/??: 0 @ efl_ui_zoom_interface_get() /usr/lib64/libeo.so.1 | ??/??: 0 @ efl_composite_part_is() /usr/lib64/libeo.so.1 | ??/??: 0 @ efl_event_callback_legacy_call() /usr/lib64/libeo.so.1 | ??/??: 0 @ efl_event_callback_legacy_call() /usr/lib64/libevas.so.1 | ??/??: 0 @ efl_ui_zoom_interface_get() /usr/lib64/libevas.so.1 | ??/??: 0 @ efl_ui_zoom_interface_get() /usr/lib64/libevas.so.1 | ??/??: 0 @ efl_ui_zoom_interface_get() /usr/lib64/libevas.so.1 | ??/??: 0 @ evas_event_feed_axis_update() /usr/lib64/libevas.so.1 | ??/??: 0 @ evas_event_feed_mouse_cancel() /usr/lib64/libeo.so.1 | ??/??: 0 @ efl_composite_part_is() /usr/lib64/libeo.so.1 | ??/??: 0 @ efl_event_callback_legacy_call() /usr/lib64/libecore_evas.so.1 | ??/??: 0 @ _ecore_evas_mouse_multi_up_process() /usr/lib64/libecore_evas.so.1 | ??/??: 0 @ _ecore_evas_input_direct_cb() /usr/lib64/libecore_input_evas.so.1| ??/??: 0 @ ecore_event_evas_mouse_move() /usr/lib64/libecore.so.1 | ??/??: 0 @ ecore_event_add() /usr/lib64/libecore.so.1 | ??/??: 0 @ ecore_main_fd_handler_add() /usr/lib64/libecore.so.1 | ??/??: 0 @ ecore_main_loop_begin() /usr/lib64/libecore.so.1 | ??/??: 0 @ ecore_main_loop_begin() /usr/lib64/libecore.so.1 | ??/??: 0 @ efl_loop_begin() /usr/bin/elementary_test | / : 0 @ () /lib64/libc.so.6 | ??/??: 0 @ __libc_start_main() /usr/bin/elementary_test | ??/??: 0 @ _start()
Also getting a "GL backend engine is not suppored" message although GLViewGears and GLView GL ES 3.x both work.