.
Thread 4 (Thread 0x7f5dbcdc9700 (LWP 1053)):
#0  0x00007f5dbe949733 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = 0
        result = <optimized out>
#1  0x00007f5dbf4a6bf6 in g_main_context_poll (n_fds=3, fds=0x7f5db80017c0, timeout=-1, context=0xf5c470, priority=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3415
        poll_func = 0x7f5dbf4b3b60 <g_poll>
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0xf5c470, self=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3116
        timeout = -1
        some_ready = <optimized out>
        fds = 0x7f5db80017c0
        max_priority = 2147483647
        nfds = 3
        allocated_nfds = <optimized out>
#3  g_main_context_iterate (context=0xf5c470, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3058
        some_ready = -1207953472
#4  0x00007f5dbf4a705a in g_main_loop_run (loop=0xf5c420) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3315
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#5  0x00007f5dbfc654c6 in gdbus_shared_thread_func (user_data=0xf5c440) at /build/buildd/glib2.0-2.31.2/./gio/gdbusprivate.c:276
        data = 0xf5c440
#6  0x00007f5dbf4c80a5 in g_thread_proxy (data=0xf54ed0) at /build/buildd/glib2.0-2.31.2/./glib/gthread.c:801
        thread = 0xf54ed0
#7  0x00007f5dbec1aefc in start_thread (arg=0x7f5dbcdc9700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7f5dbcdc9700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 3993781760236384094, 140040585649104, 140040577259968, 0, 3, -3902445077549355170, -3902440706352418978}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007f5dbe95585d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (Thread 0x7f5dbd5ca700 (LWP 1051)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:216
No locals.
#1  0x00007f5dbf4e1e85 in g_cond_wait_until (cond=0xf50838, mutex=<optimized out>, end_time=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gthread-posix.c:870
        ts = {tv_sec = 32, tv_nsec = 864744000}
        status = <optimized out>
#2  0x00007f5dbf47d69e in g_async_queue_pop_intern_unlocked (queue=0xf50830, wait=1, end_time=0x7f5dbd5c9dd0) at /build/buildd/glib2.0-2.31.2/./glib/gasyncqueue.c:418
        retval = <optimized out>
        __PRETTY_FUNCTION__ = "g_async_queue_pop_intern_unlocked"
#3  0x00007f5dbf47dcae in g_async_queue_timed_pop (queue=0xf50830, end_time=0x7f5dbd5c9dd0) at /build/buildd/glib2.0-2.31.2/./glib/gasyncqueue.c:542
        retval = <optimized out>
        __PRETTY_FUNCTION__ = "g_async_queue_timed_pop"
#4  0x00007f5dbf4c8837 in g_thread_pool_wait_for_new_pool () at /build/buildd/glib2.0-2.31.2/./glib/gthreadpool.c:174
        end_time = {tv_sec = 1323573957, tv_usec = 389667}
        pool = <optimized out>
        local_max_idle_time = 15000
        local_wakeup_thread_serial = <optimized out>
        local_max_unused_threads = 2
        last_wakeup_thread_serial = 0
        have_relayed_thread_marker = 0
#5  g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gthreadpool.c:374
        free_pool = <optimized out>
        task = 0x2
        pool = <optimized out>
#6  0x00007f5dbf4c80a5 in g_thread_proxy (data=0xf4a5e0) at /build/buildd/glib2.0-2.31.2/./glib/gthread.c:801
        thread = 0xf4a5e0
#7  0x00007f5dbec1aefc in start_thread (arg=0x7f5dbd5ca700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7f5dbd5ca700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 3993781760236384094, 140734199513440, 140040585652672, 0, 3, -3902446176524112034, -3902440706352418978}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007f5dbe95585d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 0x7f5db7fff700 (LWP 1057)):
#0  0x00007f5dbe949733 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = 0
        result = <optimized out>
#1  0x00007f5dbf4a6bf6 in g_main_context_poll (n_fds=1, fds=0xf5f340, timeout=-1, context=0xf63c00, priority=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3415
        poll_func = 0x7f5dbf4b3b60 <g_poll>
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0xf63c00, self=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3116
        timeout = -1
        some_ready = <optimized out>
        fds = 0xf5f340
        max_priority = 2147483647
        nfds = 1
        allocated_nfds = <optimized out>
#3  g_main_context_iterate (context=0xf63c00, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3058
        some_ready = 16118592
#4  0x00007f5dbf4a6d24 in g_main_context_iteration (context=0xf63c00, may_block=1) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3182
        retval = <optimized out>
#5  0x00007f5dbf4a6d71 in glib_worker_main (data=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:4854
No locals.
#6  0x00007f5dbf4c80a5 in g_thread_proxy (data=0xf4a680) at /build/buildd/glib2.0-2.31.2/./glib/gthread.c:801
        thread = 0xf4a680
#7  0x00007f5dbec1aefc in start_thread (arg=0x7f5db7fff700) at pthread_create.c:304
        __res = <optimized out>
        pd = 0x7f5db7fff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 3993781760236384094, 140734199511968, 140040495692224, 0, 3, -3902460723041472674, -3902440706352418978}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007f5dbe95585d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 0x7f5dc00e77c0 (LWP 958)):
#0  check_stopped (seat=0xf51a40) at seat.c:415
No locals.
#1  0x00007f5dbf962154 in g_closure_invoke (closure=0xf5f0f0, return_value=0x0, n_param_values=1, param_values=0xf62740, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.31.2/./gobject/gclosure.c:774
        marshal = 0x405510 <g_cclosure_marshal_VOID__VOID@plt>
        marshal_data = <optimized out>
        in_marshal = <optimized out>
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#2  0x00007f5dbf971ea5 in signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x0, instance_and_params=0xf62740) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3302
        tmp = <optimized out>
        handler = 0xf48090
        accumulator = 0x0
        emission = {next = 0x7fff3bf83b30, instance = 0x7f5db8008500, ihint = {signal_id = 24, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        class_closure = 0xf5dab0
        hlist = 0xf5f318
        handler_list = 0xf48090
        return_accu = 0x0
        accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}}
        signal_id = 24
        max_sequential_handler_number = 25
        return_value_altered = 0
#3  0x00007f5dbf97987b in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=0x7fff3bf83938) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3033
        instance_and_params = 0xf62740
        signal_return_type = 4
        param_values = 0xf62758
        node = 0xf5bda0
        i = <optimized out>
        n_params = 0
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#4  0x00007f5dbf979a42 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3090
        var_args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fff3bf83a10, reg_save_area = 0x7fff3bf83950}}
#5  0x00007f5dbf962154 in g_closure_invoke (closure=0xf5f3c0, return_value=0x0, n_param_values=1, param_values=0xf62840, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.31.2/./gobject/gclosure.c:774
        marshal = 0x405510 <g_cclosure_marshal_VOID__VOID@plt>
        marshal_data = <optimized out>
        in_marshal = <optimized out>
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#6  0x00007f5dbf971ea5 in signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x0, instance_and_params=0xf62840) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3302
        tmp = <optimized out>
        handler = 0xf480f0
        accumulator = 0x0
        emission = {next = 0x7fff3bf83f50, instance = 0xf57020, ihint = {signal_id = 14, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        class_closure = 0xf49d10
        hlist = 0xf5f418
        handler_list = 0xf480f0
        return_accu = 0x0
        accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}}
        signal_id = 14
        max_sequential_handler_number = 25
        return_value_altered = 0
#7  0x00007f5dbf97987b in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=0x7fff3bf83d28) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3033
        instance_and_params = 0xf62840
        signal_return_type = 4
        param_values = 0xf62858
        node = 0xf49d80
        i = <optimized out>
        n_params = 0
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#8  0x00007f5dbf979a42 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3090
        var_args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fff3bf83e00, reg_save_area = 0x7fff3bf83d40}}
#9  0x0000000000418d69 in stopped_cb (process=<optimized out>, server=0xf57020) at xserver-local.c:354
No locals.
#10 0x00007f5dbf962154 in g_closure_invoke (closure=0xf5f4c0, return_value=0x0, n_param_values=1, param_values=0xf628c0, invocation_hint=<optimized out>) at /build/buildd/glib2.0-2.31.2/./gobject/gclosure.c:774
        marshal = 0x405510 <g_cclosure_marshal_VOID__VOID@plt>
        marshal_data = <optimized out>
        in_marshal = <optimized out>
        __PRETTY_FUNCTION__ = "g_closure_invoke"
#11 0x00007f5dbf971ea5 in signal_emit_unlocked_R (node=<optimized out>, detail=0, instance=<optimized out>, emission_return=0x0, instance_and_params=0xf628c0) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3302
        tmp = <optimized out>
        handler = 0xf48180
        accumulator = 0x0
        emission = {next = 0x0, instance = 0xf4a630, ihint = {signal_id = 5, detail = 0, run_type = G_SIGNAL_RUN_FIRST}, state = EMISSION_RUN, chain_type = 4}
        class_closure = 0xf49620
        hlist = 0xf5f568
        handler_list = 0xf48180
        return_accu = 0x0
        accu = {g_type = 0, data = {{v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}, {v_int = 0, v_uint = 0, v_long = 0, v_ulong = 0, v_int64 = 0, v_uint64 = 0, v_float = 0, v_double = 0, v_pointer = 0x0}}}
        signal_id = 5
        max_sequential_handler_number = 25
        return_value_altered = 0
#12 0x00007f5dbf97987b in g_signal_emit_valist (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>, var_args=0x7fff3bf84148) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3033
        instance_and_params = 0xf628c0
        signal_return_type = 4
        param_values = 0xf628d8
        node = 0xf43cb0
        i = <optimized out>
        n_params = 0
        __PRETTY_FUNCTION__ = "g_signal_emit_valist"
#13 0x00007f5dbf979a42 in g_signal_emit (instance=<optimized out>, signal_id=<optimized out>, detail=<optimized out>) at /build/buildd/glib2.0-2.31.2/./gobject/gsignal.c:3090
        var_args = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7fff3bf84220, reg_save_area = 0x7fff3bf84160}}
#14 0x00007f5dbf4a4514 in g_child_watch_dispatch (source=<optimized out>, callback=<optimized out>, user_data=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:4433
        child_watch_source = <optimized out>
        child_watch_callback = <optimized out>
#15 0x00007f5dbf4a689a in g_main_dispatch (context=0xf46f70) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:2513
        dispatch = 0x7f5dbf4a4500 <g_child_watch_dispatch>
        was_in_call = 0
        user_data = 0xf4a630
        callback = 0x410050 <process_watch_cb>
        cb_funcs = 0x7f5dbf74f9a0
        cb_data = 0xf63e20
        current_source_link = {data = 0xf63280, next = 0x0}
        need_destroy = <optimized out>
        source = 0xf63280
        current = 0xf45690
        i = <optimized out>
#16 g_main_context_dispatch (context=0xf46f70) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3050
No locals.
#17 0x00007f5dbf4a6c60 in g_main_context_iterate (dispatch=1, block=<optimized out>, context=0xf46f70, self=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3121
        timeout = -1
        some_ready = 1
        fds = <optimized out>
        max_priority = 2147483647
        nfds = 2
        allocated_nfds = <optimized out>
#18 g_main_context_iterate (context=0xf46f70, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3058
        some_ready = 1
#19 0x00007f5dbf4a705a in g_main_loop_run (loop=0xf470d0) at /build/buildd/glib2.0-2.31.2/./glib/gmain.c:3315
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#20 0x0000000000406da3 in main (argc=1, argv=0x7fff3bf84838) at lightdm.c:1305
        pid_file = <optimized out>
        option_context = <optimized out>
        result = <optimized out>
        groups = <optimized out>
        i = <optimized out>
        dir = <optimized out>
        n_seats = <optimized out>
        explicit_config = <optimized out>
        test_mode = 0
        pid_path = 0x41d0ec "/var/run/lightdm.pid"
        xserver_command = 0x0
        passwd_path = 0x0
        xsessions_dir = 0x0
        xgreeters_dir = 0x0
        greeter_session = 0x0
        user_session = 0x0
        session_wrapper = 0x0
        config_dir = <optimized out>
        log_dir = 0x0
        run_dir = 0x0
        cache_dir = 0x0
        default_log_dir = <optimized out>
        default_run_dir = <optimized out>
        default_cache_dir = <optimized out>
        minimum_vt = 0x0
        minimum_display_number = 0x0
        show_version = 0
        options = {{long_name = 0x41f4a9 "config", short_name = 99 'c', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x6279a8, description = 0x41d136 "Use configuration file", arg_description = 0x41d14d "FILE"}, {long_name = 0x41d152 "debug", short_name = 100 'd', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x6279b0, description = 0x41d158 "Print debugging messages", arg_description = 0x0}, {long_name = 0x41d171 "test-mode", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x7fff3bf84718, description = 0x41dec8 "Run as unprivileged user, skipping things that require root access", arg_description = 0x0}, {long_name = 0x41d17b "passwd-file", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846b0, description = 0x41df10 "Use the given password file for authentication (for testing, requires --no-root)", arg_description = 0x41d14d "FILE"}, {long_name = 0x41d187 "pid-file", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846a0, description = 0x41d190 "File to write PID into", arg_description = 0x41d14d "FILE"}, {long_name = 0x41d1a7 "xserver-command", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846a8, description = 0x41d1b7 "Command to run X servers", arg_description = 0x41d1d0 "COMMAND"}, {long_name = 0x41d1d8 "greeter-session", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846c8, description = 0x41d1e8 "Greeter session", arg_description = 0x41bd9d "SESSION"}, {long_name = 0x41d1f8 "user-session", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846d0, description = 0x41d205 "User session", arg_description = 0x41bd9d "SESSION"}, {long_name = 0x41d212 "session-wrapper", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846d8, description = 0x41d222 "Session wrapper", arg_description = 0x41bd9d "SESSION"}, {long_name = 0x41d232 "minimum-vt", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846f8, description = 0x41df68 "Minimum VT to use for X servers", arg_description = 0x41d23d "NUMBER"}, {long_name = 0x41d244 "minimum-display-number", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf84700, description = 0x41df88 "Minimum display number to use for X servers", arg_description = 0x41d23d "NUMBER"}, {long_name = 0x41d25b "xsessions-dir", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846b8, description = 0x41dfb8 "Directory to load X sessions from", arg_description = 0x41d269 "DIRECTORY"}, {long_name = 0x41d273 "xgreeters-dir", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846c0, description = 0x41dfe0 "Directory to load X greeters from", arg_description = 0x41d269 "DIRECTORY"}, {long_name = 0x41d281 "log-dir", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846e0, description = 0x41d289 "Directory to write logs to", arg_description = 0x41d269 "DIRECTORY"}, {long_name = 0x41d2a4 "run-dir", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846e8, description = 0x41e008 "Directory to store running state", arg_description = 0x41d269 "DIRECTORY"}, {long_name = 0x41d2ac "cache-dir", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_STRING, arg_data = 0x7fff3bf846f0, description = 0x41e030 "Directory to cached information", arg_description = 0x41d269 "DIRECTORY"}, {long_name = 0x41d2c3 "version", short_name = 118 'v', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x7fff3bf8471c, description = 0x41d2b6 "Show release version", arg_description = 0x0}, {long_name = 0x0, short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x0, description = 0x0, arg_description = 0x0}}
        error = 0x0