.
Thread 6 (LWP 1855):
#0  0x00007f192d03dddd in ?? () from /tmp/apport_sandbox_dY_SRM/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 5 (LWP 1762):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
No locals.
#1  0x00007f192d5c2cf5 in g_cond_wait_until (cond=cond@entry=0x139ab48, mutex=mutex@entry=0x139ab40, end_time=end_time@entry=21524212) at /build/buildd/glib2.0-2.39.92/./glib/gthread-posix.c:898
        ts = {tv_sec = 21, tv_nsec = 524212000}
        status = <optimized out>
#2  0x00007f192d5571c1 in g_async_queue_pop_intern_unlocked (queue=0x139ab40, wait=wait@entry=1, end_time=21524212) at /build/buildd/glib2.0-2.39.92/./glib/gasyncqueue.c:422
        retval = <optimized out>
        __FUNCTION__ = "g_async_queue_pop_intern_unlocked"
#3  0x00007f192d557788 in g_async_queue_timeout_pop_unlocked (queue=<optimized out>, timeout=timeout@entry=500000) at /build/buildd/glib2.0-2.39.92/./glib/gasyncqueue.c:570
        end_time = <optimized out>
#4  0x00007f192d5a6872 in g_thread_pool_wait_for_new_task (pool=0x13435f0) at /build/buildd/glib2.0-2.39.92/./glib/gthreadpool.c:262
        task = <optimized out>
#5  g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.39.92/./glib/gthreadpool.c:296
        task = 0x139d2b0
        pool = 0x13435f0
#6  0x00007f192d5a5f15 in g_thread_proxy (data=0x13d4c50) at /build/buildd/glib2.0-2.39.92/./glib/gthread.c:764
        thread = 0x13d4c50
#7  0x00007f192d320182 in start_thread (arg=0x7f191d45f700) at pthread_create.c:312
        __res = <optimized out>
        pd = 0x7f191d45f700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139745842034432, 3527974610487633532, 0, 0, 139745842035136, 139745842034432, -3546627877351561604, -3546663513429875076}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007f192d04b12d in __qecvt_r (value=<optimized out>, ndigit=0, decpt=0x0, sign=0x0, buf=0x7f191d45f9c0 "\300y\272\037\031\177", len=139745842034432) at efgcvt_r.c:235
        exponent = 491124480
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 4 (LWP 1579):
#0  0x00007f192d03dddd in ?? () from /tmp/apport_sandbox_dY_SRM/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (LWP 1580):
#0  0x00007f192d03dddd in ?? () from /tmp/apport_sandbox_dY_SRM/lib/x86_64-linux-gnu/libc.so.6
No symbol table info available.
#1  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (LWP 1578):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
No locals.
#1  0x00007f192d5c2cf5 in g_cond_wait_until (cond=cond@entry=0x139ab48, mutex=mutex@entry=0x139ab40, end_time=end_time@entry=21702934) at /build/buildd/glib2.0-2.39.92/./glib/gthread-posix.c:898
        ts = {tv_sec = 21, tv_nsec = 702934000}
        status = <optimized out>
#2  0x00007f192d5571c1 in g_async_queue_pop_intern_unlocked (queue=0x139ab40, wait=wait@entry=1, end_time=21702934) at /build/buildd/glib2.0-2.39.92/./glib/gasyncqueue.c:422
        retval = <optimized out>
        __FUNCTION__ = "g_async_queue_pop_intern_unlocked"
#3  0x00007f192d557788 in g_async_queue_timeout_pop_unlocked (queue=<optimized out>, timeout=timeout@entry=500000) at /build/buildd/glib2.0-2.39.92/./glib/gasyncqueue.c:570
        end_time = <optimized out>
#4  0x00007f192d5a6872 in g_thread_pool_wait_for_new_task (pool=0x13435f0) at /build/buildd/glib2.0-2.39.92/./glib/gthreadpool.c:262
        task = <optimized out>
#5  g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.39.92/./glib/gthreadpool.c:296
        task = 0x139d5f0
        pool = 0x13435f0
#6  0x00007f192d5a5f15 in g_thread_proxy (data=0x1354b20) at /build/buildd/glib2.0-2.39.92/./glib/gthread.c:764
        thread = 0x1354b20
#7  0x00007f192d320182 in start_thread (arg=0x7f192604f700) at pthread_create.c:312
        __res = <optimized out>
        pd = 0x7f192604f700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139745988769536, 3527974610487633532, 0, 0, 139745988770240, 139745988769536, -3546674598005807492, -3546663513429875076}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007f192d04b12d in __qecvt_r (value=<optimized out>, ndigit=0, decpt=0x0, sign=0x0, buf=0x7f192604f9c0 "\220\022S-\031\177", len=139745988769536) at efgcvt_r.c:235
        exponent = 637859584
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (LWP 1577):
#0  0x00007f192cf86f79 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56
        resultvar = 0
        pid = 1577
        selftid = 1577
#1  0x00007f192cf8a388 in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x7f192e547a4c, sa_sigaction = 0x7f192e547a4c}, sa_mask = {__val = {20839648, 139746114532256, 139746136814935, 140733193388037, 0, 4294967296, 139746105191720, 21125536, 139746114532256, 130, 139746136843541, 0, 21123840, 0, 0, 139746109093728}}, sa_flags = 1824, sa_restorer = 0x710}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007f192d5a5175 in g_assertion_message (domain=domain@entry=0x7f192e545255 "GnomeDesktop", file=file@entry=0x7f192e547a4c "gnome-rr-config.c", line=line@entry=663, func=func@entry=0x7f192e547f50 <__FUNCTION__.34776> "gnome_rr_config_load_current", message=message@entry=0x1425950 "assertion failed: (gnome_rr_config_match (config, config))") at /build/buildd/glib2.0-2.39.92/./glib/gtestutils.c:2291
        lstr = "663\000\377\177\000\000\220*\205\361\377\177\000\000\000t?\001\000\000\000\000\250yT.\031\177\000"
        s = 0x14259a0 " SB\001"
#3  0x00007f192d5a520a in g_assertion_message_expr (domain=domain@entry=0x7f192e545255 "GnomeDesktop", file=file@entry=0x7f192e547a4c "gnome-rr-config.c", line=line@entry=663, func=func@entry=0x7f192e547f50 <__FUNCTION__.34776> "gnome_rr_config_load_current", expr=expr@entry=0x7f192e5479a8 "gnome_rr_config_match (config, config)") at /build/buildd/glib2.0-2.39.92/./glib/gtestutils.c:2306
        s = 0x1425950 "assertion failed: (gnome_rr_config_match (config, config))"
#4  0x00007f192e53d4be in gnome_rr_config_load_current (config=config@entry=0x13dfce0, error=error@entry=0x7ffff1852be8) at gnome-rr-config.c:663
        a = 0x13f7400
        rr_outputs = <optimized out>
        i = <optimized out>
        clone_width = <optimized out>
        clone_height = <optimized out>
        last_x = <optimized out>
        __FUNCTION__ = "gnome_rr_config_load_current"
#5  0x00007f192e53d625 in gnome_rr_config_new_current (screen=<optimized out>, error=error@entry=0x7ffff1852be8) at gnome-rr-config.c:739
        self = 0x13dfce0
#6  0x00007f192e53d711 in gnome_rr_config_load_filename (result=result@entry=0x13dfc60, filename=filename@entry=0x142e4f0 "/var/lib/lightdm/.config/monitors.xml.backup", error=error@entry=0x7ffff1852be8) at gnome-rr-config.c:679
        current = <optimized out>
        configs = <optimized out>
        found = 0
        __FUNCTION__ = "gnome_rr_config_load_filename"
#7  0x00007f191c0451f1 in apply_configuration_from_filename (manager=manager@entry=0x13dfbe0, filename=filename@entry=0x142e4f0 "/var/lib/lightdm/.config/monitors.xml.backup", no_matching_config_is_an_error=no_matching_config_is_an_error@entry=0, timestamp=timestamp@entry=0, error=error@entry=0x7ffff1852c30) at gsd-xrandr-manager.c:453
        priv = 0x13dfb80
        config = 0x13dfc60
        my_error = 0x0
        success = <optimized out>
        str = <optimized out>
#8  0x00007f191c047e31 in apply_stored_configuration_at_startup (timestamp=0, manager=0x13dfbe0) at gsd-xrandr-manager.c:1929
        success = <optimized out>
        intended_filename = 0x1402d80 "/var/lib/lightdm/.config/monitors.xml"
        pnp_ids = 0x7f192000e820
        my_error = 0x0
        backup_filename = 0x142e4f0 "/var/lib/lightdm/.config/monitors.xml.backup"
#9  gsd_xrandr_manager_start (manager=0x13dfbe0, error=error@entry=0x7ffff1852c88) at gsd-xrandr-manager.c:2070
No locals.
#10 0x00007f191c044df3 in impl_activate (plugin=0x13e2ce0) at gsd-xrandr-plugin.c:29
        error = 0x0
        plugin_cast = <optimized out>
#11 0x00000000004052a0 in _activate_plugin (info=0x13a0610) at gnome-settings-plugin-info.c:437
        res = <optimized out>
#12 gnome_settings_plugin_info_activate (info=info@entry=0x13a0610) at gnome-settings-plugin-info.c:460
        __FUNCTION__ = "gnome_settings_plugin_info_activate"
#13 0x0000000000404135 in maybe_activate_plugin (info=0x13a0610, user_data=<optimized out>) at gnome-settings-manager.c:95
        res = <optimized out>
#14 0x00007f192d59d6b8 in g_slist_foreach (list=<optimized out>, func=func@entry=0x404120 <maybe_activate_plugin>, user_data=user_data@entry=0x0) at /build/buildd/glib2.0-2.39.92/./glib/gslist.c:877
        next = 0x13c6a50
#15 0x0000000000404582 in _load_all (manager=0x7f19180048a0) at gnome-settings-manager.c:321
No locals.
#16 gnome_settings_manager_start (manager=0x7f19180048a0, error=error@entry=0x7ffff1852d68) at gnome-settings-manager.c:408
        ret = 0
#17 0x0000000000403dc0 in start_settings_manager () at main.c:151
        res = <optimized out>
        error = 0x0
#18 name_acquired_handler (connection=<optimized out>, name=<optimized out>, user_data=<optimized out>) at main.c:355
        proxy = 0x137d1e0
#19 0x00007f192db69176 in do_call (client=0x138dff0, call_type=CALL_TYPE_NAME_ACQUIRED) at /build/buildd/glib2.0-2.39.92/./gio/gdbusnameowning.c:214
        current_context = 0x1362f40
#20 0x00007f192db69398 in request_name_cb (source_object=<optimized out>, res=<optimized out>, user_data=0x138dff0) at /build/buildd/glib2.0-2.39.92/./gio/gdbusnameowning.c:326
        client = 0x138dff0
        result = 0x7f1918005b20
        request_name_reply = 1
        subscribe = 0
#21 0x00007f192db08ef7 in g_simple_async_result_complete (simple=0x1380b30) at /build/buildd/glib2.0-2.39.92/./gio/gsimpleasyncresult.c:763
        current_source = 0x7f19180054c0
        current_context = 0x0
        __FUNCTION__ = "g_simple_async_result_complete"
#22 0x00007f192db6147a in g_dbus_connection_call_done (source=<optimized out>, result=<optimized out>, user_data=0x1398520) at /build/buildd/glib2.0-2.39.92/./gio/gdbusconnection.c:5498
        simple = 0x1380b30
        connection = <optimized out>
        state = 0x1398520
        error = 0x0
        reply = 0x7f192000d630
#23 0x00007f192db08ef7 in g_simple_async_result_complete (simple=0x139f410) at /build/buildd/glib2.0-2.39.92/./gio/gsimpleasyncresult.c:763
        current_source = 0x7f19180054c0
        current_context = 0x0
        __FUNCTION__ = "g_simple_async_result_complete"
#24 0x00007f192db08f59 in complete_in_idle_cb (data=<optimized out>) at /build/buildd/glib2.0-2.39.92/./gio/gsimpleasyncresult.c:775
        simple = <optimized out>
#25 0x00007f192d580ce5 in g_main_dispatch (context=0x1362f40) at /build/buildd/glib2.0-2.39.92/./glib/gmain.c:3064
        dispatch = 0x7f192d57dbc0 <g_idle_dispatch>
        prev_source = 0x0
        was_in_call = 0
        user_data = 0x139f410
        callback = 0x7f192db08f50 <complete_in_idle_cb>
        cb_funcs = 0x7f192d83e920 <g_source_callback_funcs>
        cb_data = 0x7f1918003c50
        need_destroy = <optimized out>
        source = 0x7f19180054c0
        current = 0x13839a0
        i = 0
#26 g_main_context_dispatch (context=context@entry=0x1362f40) at /build/buildd/glib2.0-2.39.92/./glib/gmain.c:3663
No locals.
#27 0x00007f192d581048 in g_main_context_iterate (context=0x1362f40, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.39.92/./glib/gmain.c:3734
        max_priority = 2147483647
        timeout = 16616
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = 3
        fds = 0x139bfc0
#28 0x00007f192d58130a in g_main_loop_run (loop=0x139bf80) at /build/buildd/glib2.0-2.39.92/./glib/gmain.c:3928
        __FUNCTION__ = "g_main_loop_run"
#29 0x00007f192dfb0b35 in gtk_main () at /build/buildd/gtk+3.0-3.10.7/./gtk/gtkmain.c:1158
        loop = 0x139bf80
#30 0x0000000000403714 in main (argc=1, argv=0x7ffff18530b8) at main.c:476
No locals.