I hit "post" a bit too soon. Here is the backtrace from the core dump:
(gdb) bt #0 0x00007fc94980f330 in cairo_surface_get_type () from /usr/lib64/libcairo.so.2 #1 0x0000000000413893 in greeter_background_save_xroot () #2 0x000000000040e07a in ?? () #3 0x00007fc948fa20d4 in ?? () from /usr/lib64/libgobject-2.0.so.0 #4 0x00007fc948fbc5a7 in g_signal_emit_valist () from /usr/lib64/libgobject-2.0.so.0 #5 0x00007fc948fbcf1f in g_signal_emit () from /usr/lib64/libgobject-2.0.so.0 #6 0x00007fc948a6ab31 in ?? () from /usr/lib64/liblightdm-gobject-1.so.0 #7 0x00007fc948a6aeed in ?? () from /usr/lib64/liblightdm-gobject-1.so.0 #8 0x00007fc948cc84dd in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0 #9 0x00007fc948cc88b0 in ?? () from /usr/lib64/libglib-2.0.so.0 #10 0x00007fc948cc8bd2 in g_main_loop_run () from /usr/lib64/libglib-2.0.so.0 #11 0x00007fc949fb4645 in gtk_main () from /usr/lib64/libgtk-3.so.0 #12 0x000000000040c463 in main () (gdb) I cannot compare this to the error report, but "greeter_background_save_xroot" and "cairo_surface_get_type" from the title of this bug ring a bell. Here are some other similar bugs I found while searching for existing reports: https://bugzilla.redhat.com/show_bug.cgi?id=1478720 https://bugzilla.redhat.com/show_bug.cgi?id=1468864 https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter/+bug/1422794 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1677058 Title: /usr/sbin/lightdm-gtk- greeter:11:cairo_surface_get_type:set_surface_as_root:greeter_background_save_xroot:start_session:user_combo_key_press_cb To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm-gtk-greeter/+bug/1677058/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
