Created attachment 410316 [details] Screencast 1. Set ephy hardware policy to always: `gsettings set org.gnome.Epiphany.web:/org/gnome/epiphany/web/ hardware-acceleration-policy 'always'` 2. Run ephy 3. Go to open.gl 4. Click PDF link. See the video. Happens with current Technology Preview as well. #0 0x00007ffff03240a3 in wl_client_flush () at /lib64/libwayland-server.so.0 #1 0x00007ffff10b1bed in wpe_view_backend_exportable_fdo_dispatch_frame_complete () at /lib64/libWPEBackend-fdo-1.0.so.1 #2 0x00007ffff442bf0d in WebKit::AcceleratedBackingStoreWayland::tryEnsureTexture(unsigned int&, WebCore::IntSize&) () at /lib64/libwebkit2gtk-4.0.so.37 #3 0x00007ffff442c257 in WebKit::AcceleratedBackingStoreWayland::paint(_cairo*, WebCore::IntRect const&) () at /lib64/libwebkit2gtk-4.0.so.37 #4 0x00007ffff439c16d in webkitWebViewBaseDraw(_GtkWidget*, _cairo*) () at /lib64/libwebkit2gtk-4.0.so.37 #5 0x00007ffff794d664 in gtk_widget_draw_internal () at /lib64/libgtk-3.so.0 #6 0x00007ffff772dd65 in gtk_container_propagate_draw () at /lib64/libgtk-3.so.0 #7 0x00007ffff772df5d in gtk_container_draw.lto_priv () at /lib64/libgtk-3.so.0 #8 0x00007ffff794d664 in gtk_widget_draw_internal () at /lib64/libgtk-3.so.0 #9 0x00007ffff772dd65 in gtk_container_propagate_draw () at /lib64/libgtk-3.so.0 #10 0x00007ffff7838f14 in gtk_paned_render () at /lib64/libgtk-3.so.0 #11 0x00007ffff77256fd in gtk_css_custom_gadget_draw () at /lib64/libgtk-3.so.0 #12 0x00007ffff773913b in gtk_css_gadget_draw () at /lib64/libgtk-3.so.0 #13 0x00007ffff7834551 in gtk_paned_draw.lto_priv () at /lib64/libgtk-3.so.0 #14 0x00007ffff794d664 in gtk_widget_draw_internal () at /lib64/libgtk-3.so.0 #15 0x00007ffff772dd65 in gtk_container_propagate_draw () at /lib64/libgtk-3.so.0 #16 0x00007ffff772df5d in gtk_container_draw.lto_priv () at /lib64/libgtk-3.so.0 #17 0x00007ffff76d910d in gtk_box_draw_contents () at /lib64/libgtk-3.so.0 #18 0x00007ffff77256fd in gtk_css_custom_gadget_draw () at /lib64/libgtk-3.so.0 #19 0x00007ffff773913b in gtk_css_gadget_draw () at /lib64/libgtk-3.so.0 --Type <RET> for more, q to quit, c to continue without paging-- #20 0x00007ffff76d9191 in gtk_box_draw.lto_priv () at /lib64/libgtk-3.so.0 #21 0x00007ffff794d664 in gtk_widget_draw_internal () at /lib64/libgtk-3.so.0 #22 0x00007ffff772dd65 in gtk_container_propagate_draw () at /lib64/libgtk-3.so.0 #23 0x00007ffff7825b3e in gtk_notebook_draw_stack () at /lib64/libgtk-3.so.0 #24 0x00007ffff77256fd in gtk_css_custom_gadget_draw () at /lib64/libgtk-3.so.0 #25 0x00007ffff773913b in gtk_css_gadget_draw () at /lib64/libgtk-3.so.0 #26 0x00007ffff76e0cf8 in gtk_box_gadget_draw () at /lib64/libgtk-3.so.0 #27 0x00007ffff773913b in gtk_css_gadget_draw () at /lib64/libgtk-3.so.0 #28 0x00007ffff782175c in gtk_notebook_draw () at /lib64/libgtk-3.so.0 #29 0x00007ffff794d664 in gtk_widget_draw_internal () at /lib64/libgtk-3.so.0 #30 0x00007ffff772dd65 in gtk_container_propagate_draw () at /lib64/libgtk-3.so.0 #31 0x00007ffff772df5d in gtk_container_draw.lto_priv () at /lib64/libgtk-3.so.0 #32 0x00007ffff76d910d in gtk_box_draw_contents () at /lib64/libgtk-3.so.0 #33 0x00007ffff77256fd in gtk_css_custom_gadget_draw () at /lib64/libgtk-3.so.0 #34 0x00007ffff773913b in gtk_css_gadget_draw () at /lib64/libgtk-3.so.0 #35 0x00007ffff76d9191 in gtk_box_draw.lto_priv () at /lib64/libgtk-3.so.0 #36 0x00007ffff794d664 in gtk_widget_draw_internal () at /lib64/libgtk-3.so.0 #37 0x00007ffff772dd65 in gtk_container_propagate_draw () at /lib64/libgtk-3.so.0 #38 0x00007ffff21373eb in hdy_stackable_box_draw () at /lib64/libhandy-1.so.0 #39 0x00007ffff794d664 in gtk_widget_draw_internal () at /lib64/libgtk-3.so.0 #40 0x00007ffff772dd65 in gtk_container_propagate_draw () at /lib64/libgtk-3.so.0 #41 0x00007ffff772df5d in gtk_container_draw.lto_priv () at /lib64/libgtk-3.so.0 #42 0x00007ffff794d664 in gtk_widget_draw_internal () at /lib64/libgtk-3.so.0 #43 0x00007ffff772dd65 in gtk_container_propagate_draw () at /lib64/libgtk-3.so.0 #44 0x00007ffff772df5d in gtk_container_draw.lto_priv () at /lib64/libgtk-3.so.0 #45 0x00007ffff796c236 in gtk_window_draw.lto_priv () at /lib64/libgtk-3.so.0 #46 0x00007ffff799559b in _gtk_marshal_BOOLEAN__BOXED () at /lib64/libgtk-3.so.0 #47 0x00007ffff793e8cf in gtk_widget_draw_marshaller () at /lib64/libgtk-3.so.0 #48 0x00007ffff7115632 in g_closure_invoke () at /lib64/libgobject-2.0.so.0 #49 0x00007ffff713da7e in signal_emit_unlocked_R.isra.0 () at /lib64/libgobject-2.0.so.0 #50 0x00007ffff7131cde in g_signal_emit_valist () at /lib64/libgobject-2.0.so.0 #51 0x00007ffff713237f in g_signal_emit () at /lib64/libgobject-2.0.so.0 #52 0x00007ffff794d87a in gtk_widget_draw_internal () at /lib64/libgtk-3.so.0 #53 0x00007ffff795aa00 in gtk_widget_render () at /lib64/libgtk-3.so.0 #54 0x00007ffff77ff899 in gtk_main_do_event () at /lib64/libgtk-3.so.0 #55 0x00007ffff74ee043 in _gdk_event_emit () at /lib64/libgdk-3.so.0 #56 0x00007ffff7500b61 in _gdk_window_process_updates_recurse_helper.lto_priv.0 () at /lib64/libgdk-3.so.0 #57 0x00007ffff7505701 in gdk_window_process_updates_internal () at /lib64/libgdk-3.so.0 #58 0x00007ffff75058f8 in gdk_window_process_updates_with_mode.lto_priv () at /lib64/libgdk-3.so.0 #59 0x00007ffff7132260 in g_signal_emit_valist () at /lib64/libgobject-2.0.so.0 #60 0x00007ffff713237f in g_signal_emit () at /lib64/libgobject-2.0.so.0 #61 0x00007ffff74fb39f in gdk_frame_clock_paint_idle () at /lib64/libgdk-3.so.0 #62 0x00007ffff74e80c9 in gdk_threads_dispatch () at /lib64/libgdk-3.so.0 #63 0x00007ffff702564d in g_timeout_dispatch () at /lib64/libglib-2.0.so.0 #64 0x00007ffff7024fd7 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0 #65 0x00007ffff7075ab8 in g_main_context_iterate.constprop () at /lib64/libglib-2.0.so.0 #66 0x00007ffff70223ff in g_main_context_iteration () at /lib64/libglib-2.0.so.0 #67 0x00007ffff72303e5 in g_application_run () at /lib64/libgio-2.0.so.0 #68 0x000055555556fc2b in main ()