. Thread 3 (Thread 0x7f807754b700 (LWP 22651)): #0 0x00007f808942fd93 in poll () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007f80877fd136 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007f80877fd59a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007f8085a18426 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #4 0x00007f808781e7f5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007f808a625e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #6 0x00007f808943b74d in clone () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #7 0x0000000000000000 in ?? () No symbol table info available. . Thread 2 (Thread 0x7f806ffff700 (LWP 29673)): #0 0x00007f808a62a0fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #1 0x00007f80878387a5 in g_cond_wait_until () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007f80877d3271 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007f80877d388a in g_async_queue_timeout_pop () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #4 0x00007f808781ef74 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007f808781e7f5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #6 0x00007f808a625e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #7 0x00007f808943b74d in clone () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #8 0x0000000000000000 in ?? () No symbol table info available. . Thread 1 (Thread 0x7f808aa44700 (LWP 22649)): #0 0x00007f80893bb010 in fileno_unlocked () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007f807ee4cd4d in ?? () from /usr/lib/python2.7/dist-packages/cups.so No symbol table info available. #2 0x000000000047c294 in ?? () No symbol table info available. #3 0x000000000041aefa in PyObject_Call () No symbol table info available. #4 0x00000000004b70ae in PyEval_EvalFrameEx () No symbol table info available. #5 0x00000000004b6b97 in PyEval_EvalFrameEx () No symbol table info available. #6 0x00000000004bcd0d in PyEval_EvalCodeEx () No symbol table info available. #7 0x00000000004b6c5e in PyEval_EvalFrameEx () No symbol table info available. #8 0x00000000004bcd0d in PyEval_EvalCodeEx () No symbol table info available. #9 0x000000000044931f in ?? () No symbol table info available. #10 0x000000000041aefa in PyObject_Call () No symbol table info available. #11 0x0000000000430aae in ?? () No symbol table info available. #12 0x000000000041aefa in PyObject_Call () No symbol table info available. #13 0x00000000004b5d96 in PyEval_CallObjectWithKeywords () No symbol table info available. #14 0x00007f8086ea4438 in ?? () from /usr/lib/python2.7/dist-packages/gobject/_gobject.so No symbol table info available. #15 0x00007f8086c49e72 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #16 0x00007f8086c5b943 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #17 0x00007f8086c640ad in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #18 0x00007f8086c642e2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #19 0x00007f8085fe1865 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 No symbol table info available. #20 0x00007f8086c49e72 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #21 0x00007f8086c5bd28 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #22 0x00007f8086c640ad in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #23 0x00007f8086c642e2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #24 0x00007f8085fe068d in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 No symbol table info available. #25 0x00007f8086089de8 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 No symbol table info available. #26 0x00007f8086c49e72 in g_closure_invoke () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #27 0x00007f8086c5bf18 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #28 0x00007f8086c63797 in g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #29 0x00007f8086c642e2 in g_signal_emit () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0 No symbol table info available. #30 0x00007f80861a41a1 in ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 No symbol table info available. #31 0x00007f8086087f73 in gtk_propagate_event () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 No symbol table info available. #32 0x00007f80860882d3 in gtk_main_do_event () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 No symbol table info available. #33 0x00007f8085cfccac in ?? () from /usr/lib/x86_64-linux-gnu/libgdk-x11-2.0.so.0 No symbol table info available. #34 0x00007f80877fcdda in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #35 0x00007f80877fd1a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #36 0x00007f80877fd59a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #37 0x00007f8086087307 in gtk_main () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0 No symbol table info available. #38 0x00007f8086739046 in ?? () from /usr/lib/python2.7/dist-packages/gtk-2.0/gtk/_gtk.so No symbol table info available. #39 0x00000000004b78ab in PyEval_EvalFrameEx () No symbol table info available. #40 0x00000000004b6b97 in PyEval_EvalFrameEx () No symbol table info available. #41 0x00000000004bcd0d in PyEval_EvalCodeEx () No symbol table info available. #42 0x00000000004bd7e2 in PyEval_EvalCode () No symbol table info available. #43 0x00000000004dcc52 in ?? () No symbol table info available. #44 0x00000000004dd814 in PyRun_FileExFlags () No symbol table info available. #45 0x00000000004de28e in PyRun_SimpleFileExFlags () No symbol table info available. #46 0x00000000004ee6dd in Py_Main () No symbol table info available. #47 0x00007f808936c76d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #48 0x000000000041ce39 in _start () No symbol table info available.