(gdb) thread apply all bt Thread 55 (Thread 1075272288 (LWP 17120)): #0 0x00000032bbac4a36 in poll () from /lib64/libc.so.6 #1 0x00002aaaaade9ff2 in ARDOUR::Session::midi_thread_work (this=0x2aaac4fd52a0) at libs/ardour/session_midi.cc:1208 #2 0x00002aaaaadea50b in ARDOUR::Session::_midi_thread_work (arg=0x2aaac4fd52a0) at libs/ardour/session_midi.cc:1129 #3 0x00000032bc606305 in start_thread () from /lib64/libpthread.so.0 #4 0x00000032bbacd50d in clone () from /lib64/libc.so.6 #5 0x0000000000000000 in ?? () Thread 54 (Thread 1075776096 (LWP 17119)): #0 0x00000032bbac4a36 in poll () from /lib64/libc.so.6 #1 0x00002aaaaadccaeb in ARDOUR::Session::butler_thread_work (this=0x2aaac4fd52a0) at libs/ardour/session_butler.cc:175 #2 0x00002aaaaadcd827 in ARDOUR::Session::_butler_thread_work (arg=0x2aaac4fd52a0) at libs/ardour/session_butler.cc:156 #3 0x00000032bc606305 in start_thread () from /lib64/libpthread.so.0 #4 0x00000032bbacd50d in clone () from /lib64/libc.so.6 #5 0x0000000000000000 in ?? () Thread 13 (Thread 1179642464 (LWP 17065)): #0 0x00000032bbac4a36 in poll () from /lib64/libc.so.6 #1 0x00002aaaaacc602d in ARDOUR::AudioSource::peak_thread_work (arg=0x0) at libs/ardour/audiosource.cc:140 #2 0x00000032bc606305 in start_thread () from /lib64/libpthread.so.0 #3 0x00000032bbacd50d in clone () from /lib64/libc.so.6 #4 0x0000000000000000 in ?? () Thread 2 (Thread 1074240096 (LWP 17051)): #0 0x00000032bc60d4a1 in nanosleep () from /lib64/libpthread.so.0 #1 0x0000003c7464b2b8 in g_usleep () from /lib64/libglib-2.0.so.0 #2 0x00002aaaac6665c1 in Glib::usleep (microseconds=10000) at libs/glibmm2/glibmm/timer.cc:68 #3 0x00002aaaaaca8b10 in ARDOUR::AudioEngine::meter_thread (this=0x122ab30) at libs/ardour/audioengine.cc:413 #4 0x00002aaaaacabb67 in sigc::bound_mem_functor0::operator() (this=0x112ebb8) at libs/sigc++2/sigc++/functors/mem_fun.h:1781 #5 0x00002aaaaacabb83 in sigc::adaptor_functor >::operator() (this=0x112ebb0) at libs/sigc++2/sigc++/adaptors/adaptor_trait.h:251 #6 0x00002aaaaacabba7 in sigc::internal::slot_call0, void>::call_it (rep=0x112eb80) at libs/sigc++2/sigc++/functors/slot.h:103 #7 0x000000000074cdf7 in sigc::slot0::operator() (this=0x11239b0) at libs/sigc++2/sigc++/functors/slot.h:440 #8 0x00002aaaac65c540 in call_thread_entry_slot (data=0x11239b0) at libs/glibmm2/glibmm/thread.cc:43 #9 0x0000003c746490f4 in g_thread_create_full () from /lib64/libglib-2.0.so.0 #10 0x00000032bc606305 in start_thread () from /lib64/libpthread.so.0 #11 0x00000032bbacd50d in clone () from /lib64/libc.so.6 #12 0x0000000000000000 in ?? () Thread 1 (Thread 46912543427280 (LWP 17050)): #0 0x00000032c5008f30 in jack_port_get_connections () from /usr/lib64/libjack.so.0 #1 0x0000000000774145 in ARDOUR::Port::get_connections (this=0x2aaac4f81af0) at libs/ardour/ardour/port.h:87 #2 0x00002aaaaad26fd3 in ARDOUR::IO::state (this=0x2aaac4cb6eb0, full_state=true) at libs/ardour/io.cc:1531 #3 0x00002aaaaad7c3a0 in ARDOUR::Route::state (this=0x2aaac4cb6eb0, full_state=true) at libs/ardour/route.cc:1407 #4 0x00002aaaaaca02ed in ARDOUR::AudioTrack::state (this=0x2aaac4cb6eb0, full_state=true) at libs/ardour/audio_track.cc:302 #5 0x00002aaaaac9a4d1 in ARDOUR::Track::get_state (this=0x2aaac4cb6eb0) at libs/ardour/track.cc:74 #6 0x00002aaaaadfca20 in ARDOUR::Session::state (this=0x2aaac4fd52a0, full_state=true) at libs/ardour/session_state.cc:968 #7 0x00002aaaaadfd536 in ARDOUR::Session::get_state (this=0x2aaac4fd52a0) at libs/ardour/session_state.cc:804 #8 0x00002aaaaadfe075 in ARDOUR::Session::save_state (this=0x2aaac4fd52a0, snapshot_name=@0x7fff4dfb7b60, pending=false) ---Type to continue, or q to quit--- at libs/ardour/session_state.cc:592 #9 0x000000000075f7a8 in ARDOUR_UI::save_state_canfail (this=0xebf190, name=@0x7fff4dfb7bb0) at gtk2_ardour/ardour_ui.cc:1531 #10 0x000000000075f82d in ARDOUR_UI::save_state (this=0xebf190, name=@0x14f2f38) at gtk2_ardour/ardour_ui.cc:1518 #11 0x000000000079b97d in sigc::bound_mem_functor1::operator() (this=0x14f2f20, _A_a1=@0x14f2f38) at libs/sigc++2/sigc++/functors/mem_fun.h:1838 #12 0x000000000079b9a1 in sigc::adaptor_functor >::operator() (this=0x14f2f18, _A_arg1=@0x14f2f38) at libs/sigc++2/sigc++/adaptors/adaptor_trait.h:84 #13 0x000000000079b9c5 in sigc::bind_functor<-1, sigc::bound_mem_functor1, std::string, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>::operator() (this=0x14f2f10) at libs/sigc++2/sigc++/adaptors/bind.h:1269 #14 0x000000000079b9e9 in sigc::internal::slot_call0, std::string, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>, void>::call_it (rep=0x14f2ee0) at libs/sigc++2/sigc++/functors/slot.h:103 #15 0x000000000074cdf7 in sigc::slot0::operator() (this=0x14f2e58) at libs/sigc++2/sigc++/functors/slot.h:440 #16 0x00002aaaac654373 in Glib::SignalProxyNormal::slot0_void_callback (self=0x14eab80, data=0x14f2e50) at libs/glibmm2/glibmm/signalproxy.cc:95 #17 0x0000003c74a0af19 in g_closure_invoke () from /lib64/libgobject-2.0.so.0 #18 0x0000003c74a1aa3a in g_signal_chain_from_overridden () from /lib64/libgobject-2.0.so.0 #19 0x0000003c74a1bbd4 in g_signal_emit_valist () from /lib64/libgobject-2.0.so.0 #20 0x0000003c74a1bda3 in g_signal_emit () from /lib64/libgobject-2.0.so.0 #21 0x0000003c75e64963 in gtk_widget_get_action () from /usr/lib64/libgtk-x11-2.0.so.0 #22 0x0000003c74a0af19 in g_closure_invoke () from /lib64/libgobject-2.0.so.0 #23 0x0000003c74a1a788 in g_signal_chain_from_overridden () from /lib64/libgobject-2.0.so.0 #24 0x0000003c74a1bbd4 in g_signal_emit_valist () from /lib64/libgobject-2.0.so.0 #25 0x0000003c74a1bda3 in g_signal_emit () from /lib64/libgobject-2.0.so.0 #26 0x0000003c7603407a in gtk_widget_activate () from /usr/lib64/libgtk-x11-2.0.so.0 #27 0x0000003c75f3e470 in gtk_menu_shell_activate_item () from /usr/lib64/libgtk-x11-2.0.so.0 #28 0x0000003c75f3f920 in gtk_menu_shell_append () from /usr/lib64/libgtk-x11-2.0.so.0 #29 0x0000003c75f3266d in gtk_marshal_BOOLEAN__VOID () from /usr/lib64/libgtk-x11-2.0.so.0 #30 0x0000003c74a0af19 in g_closure_invoke () from /lib64/libgobject-2.0.so.0 #31 0x0000003c74a1ad98 in g_signal_chain_from_overridden () from /lib64/libgobject-2.0.so.0 #32 0x0000003c74a1b99d in g_signal_emit_valist () from /lib64/libgobject-2.0.so.0 #33 0x0000003c74a1bda3 in g_signal_emit () from /lib64/libgobject-2.0.so.0 #34 0x0000003c760303ae in gtk_widget_get_default_style () from /usr/lib64/libgtk-x11-2.0.so.0 #35 0x0000003c75f2bc7d in gtk_propagate_event () from /usr/lib64/libgtk-x11-2.0.so.0 #36 0x0000003c75f2cc91 in gtk_main_do_event () from /usr/lib64/libgtk-x11-2.0.so.0 #37 0x0000003c75a467ec in gdk_add_client_message_filter () from /usr/lib64/libgdk-x11-2.0.so.0 #38 0x0000003c7462cf64 in g_main_context_dispatch () from /lib64/libglib-2.0.so.0 #39 0x0000003c7462fd9d in g_main_context_check () from /lib64/libglib-2.0.so.0 #40 0x0000003c746300aa in g_main_loop_run () from /lib64/libglib-2.0.so.0 #41 0x0000003c75f2d023 in gtk_main () from /usr/lib64/libgtk-x11-2.0.so.0 #42 0x00002aaaabdaabb5 in Gtk::Main::run_impl (this=0xebef60) at libs/gtkmm2/gtk/gtkmm/main.cc:503 #43 0x00002aaaabdaaa42 in Gtk::Main::run () at libs/gtkmm2/gtk/gtkmm/main.cc:450 #44 0x00002aaaab3b38f9 in Gtkmm2ext::UI::run (this=0xebf190, old_receiver=@0xe8bf60) at libs/gtkmm2ext/gtk_ui.cc:214 #45 0x00000000009b3182 in main (argc=1, argv=0x7fff4dfb93f8) at gtk2_ardour/main.cc:460 (gdb)