.
Thread 3 (Thread 0x7f84a3dba7c0 (LWP 1650)):
#0  0x00007f8487c56980 in ?? () from /usr/lib/libhpmud.so.0
No symbol table info available.
#1  0x00007f8487c4b196 in hpmud_probe_devices () from /usr/lib/libhpmud.so.0
No symbol table info available.
#2  0x00007f848c55105d in ?? () from /usr/lib/sane/libsane-hpaio.so.1
No symbol table info available.
#3  0x00007f848c551610 in sane_hpaio_get_devices () from /usr/lib/sane/libsane-hpaio.so.1
No symbol table info available.
#4  0x00007f84a35933d6 in sane_dll_get_devices () from /usr/lib/x86_64-linux-gnu/libsane.so.1
No symbol table info available.
#5  0x0000000000402474 in _start ()
No symbol table info available.
.
Thread 2 (Thread 0x7f849bfff700 (LWP 1653)):
#0  0x00007f84a27f49e3 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  0x00007f84a2d2ffa4 in g_idle_add_full (priority=<optimized out>, function=<optimized out>, data=<optimized out>, notify=<optimized out>) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:4864
        source = <optimized out>
        id = <optimized out>
        __PRETTY_FUNCTION__ = "g_idle_add_full"
#2  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 0x7f848cf73700 (LWP 12631)):
#0  0x00007f848cf86653 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#1  0x00007f848cf86fc4 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#2  0x00007f848cf8b561 in dbus_message_get_reply_serial () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#3  0x00007f848cf7f8ee in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#4  0x00007f848cf973ab in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#5  0x00007f848cf97db4 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#6  0x00007f848cf985dd in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#7  0x00007f848cf9704d in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#8  0x00007f848cf81d6c in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#9  0x00007f848cf9921a in dbus_watch_handle () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#10 0x00007f848d3d06dd in avahi_simple_poll_dispatch () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
No symbol table info available.
#11 0x00007f848d3d09ad in avahi_simple_poll_loop () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
No symbol table info available.
#12 0x00007f848d3d0a2c in ?? () from /usr/lib/x86_64-linux-gnu/libavahi-common.so.3
No symbol table info available.
#13 0x00007f84a2ad2e9a in start_thread (arg=0x7f848cf73700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f848cf73700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 881778153899427956, 140207641708672, 140207277423040, 40017600, 3, -921639914498422668, -921564649497819020}, 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"
#14 0x00007f84a280039d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#15 0x0000000000000000 in ?? ()
No symbol table info available.