. Thread 3 (Thread 0x7f78db7fe700 (LWP 1759)): #0 0x00007f78e8eecdc3 in poll () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007f78e9427f26 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007f78e942838a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007f78e02c275b in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so No symbol table info available. #4 0x00007f78e94495c5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007f78e91cae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #6 0x00007f78e8ef877d in clone () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #7 0x0000000000000000 in ?? () No symbol table info available. . Thread 2 (Thread 0x7f78e14c7700 (LWP 1756)): #0 0x00007f78e8eecdc3 in poll () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007f78e9427f26 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007f78e942838a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007f78e99f2e46 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #4 0x00007f78e94495c5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007f78e91cae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #6 0x00007f78e8ef877d in clone () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #7 0x0000000000000000 in ?? () No symbol table info available. . Thread 1 (Thread 0x7f78eab59940 (LWP 1755)): #0 0x00007f78e942ef2b in g_logv () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #1 0x00007f78e942f102 in g_log () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007f78e8172623 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0 No symbol table info available. #3 0x00007f78e817f3a7 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0 No symbol table info available. #4 0x00007f78e86f02bf in _XError () from /usr/lib/x86_64-linux-gnu/libX11.so.6 No symbol table info available. #5 0x00007f78e86ed291 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6 No symbol table info available. #6 0x00007f78e86ed2d5 in ?? () from /usr/lib/x86_64-linux-gnu/libX11.so.6 No symbol table info available. #7 0x00007f78e86ee0e0 in _XReply () from /usr/lib/x86_64-linux-gnu/libX11.so.6 No symbol table info available. #8 0x00007f78e86e9a6d in XSync () from /usr/lib/x86_64-linux-gnu/libX11.so.6 No symbol table info available. #9 0x00007f78d8025050 in ?? () from /usr/lib/gnome-settings-daemon-3.0/libkeyboard.so No symbol table info available. #10 0x00007f78e96e2384 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #11 0x00007f78e96f2635 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #12 0x00007f78e96fa00b in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #13 0x00007f78e96fa1d2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #14 0x00007f78e99d0c81 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #15 0x00007f78e5f01a14 in ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6 No symbol table info available. #16 0x00007f78e5f01435 in ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6 No symbol table info available. #17 0x00007f78e96e28ab in g_cclosure_marshal_generic () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #18 0x00007f78e96e2384 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #19 0x00007f78e96f2c1a in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #20 0x00007f78e96f9eed in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #21 0x00007f78e96fa1d2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #22 0x00007f78e99d155e in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #23 0x00007f78e99cd2fa in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #24 0x00007f78e9428ef5 in g_main_context_invoke_full () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #25 0x00007f78e99cd3d4 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #26 0x00007f78e99cd7f1 in g_settings_backend_changed () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #27 0x00007f78e02c329b in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so No symbol table info available. #28 0x00007f78e99cdd82 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #29 0x00007f78e99d0d83 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #30 0x00007f78e99d22fa in g_settings_set_enum () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #31 0x00007f78d80251b3 in ?? () from /usr/lib/gnome-settings-daemon-3.0/libkeyboard.so No symbol table info available. #32 0x00007f78e817b901 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0 No symbol table info available. #33 0x00007f78e817ba90 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0 No symbol table info available. #34 0x00007f78e814e581 in gdk_display_get_event () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0 No symbol table info available. #35 0x00007f78e817b782 in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-3.so.0 No symbol table info available. #36 0x00007f78e9427bca in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #37 0x00007f78e9427f90 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #38 0x00007f78e942838a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #39 0x00007f78e9e051dd in gtk_main () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0 No symbol table info available. #40 0x000000000040374f in main () No symbol table info available.