. Thread 3 (Thread 0x7f097f516700 (LWP 11080)): #0 0x00007f098d25fd93 in poll () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007f098c863136 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #2 0x00007f098c86359a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #3 0x00007f0985845426 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0 No symbol table info available. #4 0x00007f098c8847f5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #5 0x00007f098cd2fe9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #6 0x00007f098d26b74d 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 0x7f0977fff700 (LWP 11081)): #0 0x00007f098d264ab3 in select () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007f098e5776df in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #2 0x00007f098e49afbb in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #3 0x00007f098cd2fe9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0 No symbol table info available. #4 0x00007f098d26b74d in clone () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #5 0x0000000000000000 in ?? () No symbol table info available. . Thread 1 (Thread 0x7f098f7ad780 (LWP 11077)): #0 0x0000000000495b00 in Device_Manager_Widget::on_actionProperties_triggered() () No symbol table info available. #1 0x000000000066134b in Device_Manager_Widget::qt_metacall(QMetaObject::Call, int, void**) () No symbol table info available. #2 0x00007f098e5adad9 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #3 0x00007f098eab5f52 in QAction::triggered(bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #4 0x00007f098eab613f in QAction::activate(QAction::ActionEvent) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #5 0x00007f098e5ad8d1 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #6 0x00007f098f14d0c2 in QAbstractButton::clicked(bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #7 0x00007f098ee8b2ee in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #8 0x00007f098ee8c62b in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #9 0x00007f098ee8c89c in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #10 0x00007f098ef49e6a in QToolButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #11 0x00007f098eb0cf64 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #12 0x00007f098eabc6b4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #13 0x00007f098eac1edf in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #14 0x00007f098e5994ec in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #15 0x00007f098eabd682 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer&, bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #16 0x00007f098eb3ca15 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #17 0x00007f098eb3b9ce in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #18 0x00007f098eb64e22 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #19 0x00007f098c862dda in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #20 0x00007f098c8631a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #21 0x00007f098c863264 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #22 0x00007f098e5c8a0f in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #23 0x00007f098eb64aae in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #24 0x00007f098e5982d2 in QEventLoop::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #25 0x00007f098e598527 in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #26 0x00007f098e59d5b7 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #27 0x000000000043f5ce in main () No symbol table info available.