.
Thread 2 (process 7875):
#0  0x00007f8e6a9e9482 in select () from /lib/libc.so.6
#1  0x00007f8e6be55ed6 in ?? () from /usr/lib/libQtCore.so.4
#2  0x00007f8e6bd8d362 in ?? () from /usr/lib/libQtCore.so.4
#3  0x00007f8e66f0a3ea in start_thread () from /lib/libpthread.so.0
#4  0x00007f8e6a9f0c6d in clone () from /lib/libc.so.6
#5  0x0000000000000000 in ?? ()
.
Thread 1 (process 7745):
#0  0x00007f8e6b1ab46a in QApplicationPrivate::x11_initialize_style ()
   from /usr/lib/libQtGui.so.4
#1  0x00007f8e6b155aa5 in QApplication::style () from /usr/lib/libQtGui.so.4
#2  0x00007f8e6b19c598 in QWidget::isActiveWindow ()
   from /usr/lib/libQtGui.so.4
#3  0x00007f8e6b3b95d5 in QStyleOption::init () from /usr/lib/libQtGui.so.4
#4  0x00007f8e6b4f593d in QScrollBar::initStyleOption ()
   from /usr/lib/libQtGui.so.4
#5  0x00007f8e6b4f60e6 in QScrollBar::sizeHint () from /usr/lib/libQtGui.so.4
#6  0x00007f8e6b52a728 in QAbstractScrollArea::maximumViewportSize ()
   from /usr/lib/libQtGui.so.4
#7  0x00007f8e6b5f9419 in ?? () from /usr/lib/libQtGui.so.4
#8  0x00007f8e6b5fa25a in ?? () from /usr/lib/libQtGui.so.4
#9  0x00007f8e6b5fa82f in QTreeView::rowsAboutToBeRemoved ()
   from /usr/lib/libQtGui.so.4
#10 0x00007f8e6b5c433f in QAbstractItemView::qt_metacall ()
   from /usr/lib/libQtGui.so.4
#11 0x00007f8e6b6046d5 in QTreeView::qt_metacall ()
   from /usr/lib/libQtGui.so.4
#12 0x00007f8e6be8a004 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#13 0x00007f8e6bebfdc4 in QAbstractItemModel::rowsAboutToBeRemoved ()
   from /usr/lib/libQtCore.so.4
#14 0x00007f8e6be70b63 in QAbstractItemModel::beginRemoveRows ()
   from /usr/lib/libQtCore.so.4
#15 0x00007f8e5d01a34e in ?? () from /usr/lib/kde4/kmobiletoolsmainpart.so
#16 0x00007f8e5d01a8dc in ?? () from /usr/lib/kde4/kmobiletoolsmainpart.so
#17 0x00007f8e6be8a004 in QMetaObject::activate ()
   from /usr/lib/libQtCore.so.4
#18 0x00007f8e6cbc30d5 in KMobileTools::DeviceLoader::deviceUnloaded ()
   from /usr/lib/libkmobiletoolslib.so.4
#19 0x00007f8e6cbc3488 in KMobileTools::DeviceLoader::unloadDevice ()
   from /usr/lib/libkmobiletoolslib.so.4
#20 0x00007f8e6cbc4227 in KMobileTools::DeviceLoader::~DeviceLoader ()
   from /usr/lib/libkmobiletoolslib.so.4
#21 0x00007f8e6cbc4387 in ?? () from /usr/lib/libkmobiletoolslib.so.4
#22 0x00007f8e6a94066d in exit () from /lib/libc.so.6
#23 0x00007f8e6a92846d in __libc_start_main () from /lib/libc.so.6
#24 0x00000000004064f9 in _start ()