.
Thread 4 (Thread 0x7f17414b3700 (LWP 1838)):
#0  0x00007f176b5953dd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f17437d5041 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#2  0x00007f17437c684c in pa_mainloop_poll () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#3  0x00007f17437c6ede in pa_mainloop_iterate () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#4  0x00007f17437c6f90 in pa_mainloop_run () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#5  0x00007f17437d4ff3 in ?? () from /usr/lib/x86_64-linux-gnu/libpulse.so.0
No symbol table info available.
#6  0x00007f1742a24ee8 in ?? () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so
No symbol table info available.
#7  0x00007f176b876f6e in start_thread (arg=0x7f17414b3700) at pthread_create.c:311
        __res = <optimized out>
        pd = 0x7f17414b3700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139737856423680, -2794618189255352322, 0, 139738615992416, 139738565052192, 4096, 2817290765900111870, 2817373884296781822}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007f176b5a1e2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.
.
Thread 3 (Thread 0x7f1763460700 (LWP 1433)):
#0  0x00007f176b5953dd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f176c83f6b4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f176c83f7bc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f1763467a9d in ?? () from /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
No symbol table info available.
#4  0x00007f176c864345 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f176b876f6e in start_thread (arg=0x7f1763460700) at pthread_create.c:311
        __res = <optimized out>
        pd = 0x7f1763460700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139738426509056, -2794618189255352322, 0, 139738615992416, 140737431519808, 4096, 2817356828402704382, 2817373884296781822}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f176b5a1e2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.
.
Thread 2 (Thread 0x7f1764072700 (LWP 1399)):
#0  0x00007f176b5953dd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007f176c83f6b4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#2  0x00007f176c83fb1a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0x00007f176d496956 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
No symbol table info available.
#4  0x00007f176c864345 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#5  0x00007f176b876f6e in start_thread (arg=0x7f1764072700) at pthread_create.c:311
        __res = <optimized out>
        pd = 0x7f1764072700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139738439165696, -2794618189255352322, 0, 139738615992416, 140737431519328, 4096, 2817368382938472446, 2817373884296781822}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#6  0x00007f176b5a1e2d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.
.
Thread 1 (Thread 0x7f176e8cc980 (LWP 1329)):
#0  0x00007f176cb2ac9c in g_type_check_instance_is_a () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#1  0x00007f176c5ec7e6 in lightdm_layout_get_description () from /usr/lib/liblightdm-gobject-1.so.0
No symbol table info available.
#2  0x000000000041dff3 in ?? ()
No symbol table info available.
#3  0x00007f176c83b469 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#4  0x000000000041fa34 in ?? ()
No symbol table info available.
#5  0x0000000000431c57 in ?? ()
No symbol table info available.
#6  0x00007f176cb08517 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#7  0x00007f176cb2234c in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#8  0x00007f176cb23152 in g_signal_emit_by_name () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#9  0x000000000041a815 in ?? ()
No symbol table info available.
#10 0x00007f176cb0ad2e in g_cclosure_marshal_VOID__DOUBLEv () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#11 0x00007f176cb08517 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#12 0x00007f176cb2234c in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#13 0x00007f176cb23152 in g_signal_emit_by_name () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
No symbol table info available.
#14 0x000000000040d776 in ?? ()
No symbol table info available.
#15 0x00007f176c83ff23 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#16 0x00007f176c83f3c6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#17 0x00007f176c83f718 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#18 0x00007f176c83fb1a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#19 0x00007f176dd743a5 in gtk_main () from /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
No symbol table info available.
#20 0x000000000042dc24 in ?? ()
No symbol table info available.
#21 0x00007f176b4c9de5 in __libc_start_main (main=0x40d3d0, argc=1, ubp_av=0x7ffffc9cc928, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffffc9cc918) at libc-start.c:260
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -2794618189255352322, 4248560, 140737431521568, 0, 0, 2794620636930433022, 2817374340044873726}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x439bd0, 0x7ffffc9cc928}, data = {prev = 0x0, cleanup = 0x0, canceltype = 4430800}}}
        not_first_call = <optimized out>
#22 0x000000000040d419 in ?? ()
No symbol table info available.