.
Thread 6 (Thread 0x7fd562587e00 (LWP 2439)):
#0  0x00007fd560b130bd in poll () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x00007fd5613a678f in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#2  0x00007fd5613a53fe in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#3  0x00007fd56138e164 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#4  0x00007fd56138e321 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#5  0x00007fd56138eae1 in ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#6  0x00007fd56138f11a in dbus_connection_send_with_reply_and_block () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#7  0x00007fd56138aee8 in dbus_bus_register () from /lib/x86_64-linux-gnu/libdbus-1.so.3
No symbol table info available.
#8  0x00005647edace546 in usc::DBusConnectionHandle::DBusConnectionHandle(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) ()
No symbol table info available.
#9  0x00005647edac2bdc in usc::UnityPowerButtonEventSink::UnityPowerButtonEventSink(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) ()
No symbol table info available.
#10 0x00005647edab249e in ?? ()
No symbol table info available.
#11 0x00005647edab5361 in usc::Server::the_power_button_event_sink() ()
No symbol table info available.
#12 0x00005647edab6470 in ?? ()
No symbol table info available.
#13 0x00005647edab43b9 in usc::Server::the_screen_event_handler() ()
No symbol table info available.
#14 0x00005647edabf646 in ?? ()
No symbol table info available.
#15 0x00007fd562117637 in mir::run_mir(mir::ServerConfiguration&, std::function<void (mir::DisplayServer&)>, std::function<void (int)> const&) () from /usr/lib/x86_64-linux-gnu/libmirserver.so.41
No symbol table info available.
#16 0x00007fd562125026 in mir::Server::run() () from /usr/lib/x86_64-linux-gnu/libmirserver.so.41
No symbol table info available.
#17 0x00005647edabef25 in usc::SystemCompositor::run() ()
No symbol table info available.
#18 0x00005647edab09a2 in main ()
No symbol table info available.
.
Thread 5 (Thread 0x7fd556938700 (LWP 2445)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x00007fd5599d3583 in ?? () from /usr/lib/x86_64-linux-gnu/dri/kms_swrast_dri.so
No symbol table info available.
#2  0x00007fd5599d33e7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/kms_swrast_dri.so
No symbol table info available.
#3  0x00007fd5619dd70a in start_thread (arg=0x7fd556938700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7fd556938700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140554257270528, 6529053918658814005, 0, 140731231902607, 140554257271232, 140554257270528, -6543318127746752459, -6543421527854030795}, 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"
#4  0x00007fd560b1f0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105
No locals.
.
Thread 4 (Thread 0x7fd556137700 (LWP 2446)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x00007fd5599d3583 in ?? () from /usr/lib/x86_64-linux-gnu/dri/kms_swrast_dri.so
No symbol table info available.
#2  0x00007fd5599d33e7 in ?? () from /usr/lib/x86_64-linux-gnu/dri/kms_swrast_dri.so
No symbol table info available.
#3  0x00007fd5619dd70a in start_thread (arg=0x7fd556137700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7fd556137700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140554248877824, 6529053918658814005, 0, 140731231902607, 140554248878528, 140554248877824, -6543317028771995595, -6543421527854030795}, 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"
#4  0x00007fd560b1f0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105
No locals.
.
Thread 3 (Thread 0x7fd5556fe700 (LWP 2447)):
#0  pthread_cond_wait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
No locals.
#1  0x00007fd5610aa52c in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#2  0x00007fd56215664b in ?? () from /usr/lib/x86_64-linux-gnu/libmirserver.so.41
No symbol table info available.
#3  0x00007fd5610b050f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#4  0x00007fd5619dd70a in start_thread (arg=0x7fd5556fe700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7fd5556fe700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140554238158592, 6529053918658814005, 0, 140731231905599, 140554238159296, 140554238158592, -6543324341490687947, -6543421527854030795}, 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"
#5  0x00007fd560b1f0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105
No locals.
.
Thread 2 (Thread 0x7fd554282700 (LWP 2448)):
#0  0x00007fd560b1f6a3 in epoll_wait () at ../sysdeps/unix/syscall-template.S:84
No locals.
#1  0x00005647edac999f in boost::asio::detail::epoll_reactor::run(bool, boost::asio::detail::op_queue<boost::asio::detail::task_io_service_operation>&) ()
No symbol table info available.
#2  0x00005647edac528b in ?? ()
No symbol table info available.
#3  0x00007fd5610b050f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#4  0x00007fd5619dd70a in start_thread (arg=0x7fd554282700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7fd554282700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140554216679168, 6529053918658814005, 0, 140731231904735, 140554216679872, 140554216679168, -6543321642103742411, -6543421527854030795}, 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"
#5  0x00007fd560b1f0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105
No locals.
.
Thread 1 (Thread 0x7fd553a81700 (LWP 2449)):
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58
        set = {__val = {0, 94866956166992, 94866954848128, 0, 140554442511935, 140554426502628, 0, 140554449711440, 140554079844592, 94866955867504, 140554084057584, 140554450493280, 140554330831244, 140554453466036, 5, 0}}
        pid = <optimized out>
        tid = <optimized out>
#1  0x00007fd560a4e3ea in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {0, 140554450493280, 94866954877808, 2, 0, 67, 140554084057584, 140554450493280, 140554426503564, 1, 1, 140554429900624, 1, 140554208272832, 140554208286464, 1}}, sa_flags = 1622339462, sa_restorer = 0x7fd560dd96e0 <stderr>}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007fd561ea8681 in mir::fatal_error_abort(char const*, ...) () from /usr/lib/x86_64-linux-gnu/libmircommon.so.6
No symbol table info available.
#3  0x00007fd55af575bd in ?? () from /usr/lib/x86_64-linux-gnu/mir/server-platform/graphics-mesa-kms.so.10
No symbol table info available.
#4  0x00007fd56217ce09 in ?? () from /usr/lib/x86_64-linux-gnu/libmirserver.so.41
No symbol table info available.
#5  0x00007fd5621d02b9 in ?? () from /usr/lib/x86_64-linux-gnu/libmirserver.so.41
No symbol table info available.
#6  0x00007fd5610b050f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
No symbol table info available.
#7  0x00007fd5619dd70a in start_thread (arg=0x7fd553a81700) at pthread_create.c:333
        __res = <optimized out>
        pd = 0x7fd553a81700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140554208286464, 6529053918658814005, 0, 140731231903967, 140554208287168, 140554208286464, -6543311747035963339, -6543421527854030795}, 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  0x00007fd560b1f0af in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:105
No locals.