What is your "libgphoto" package version?
THanks

Hello!

libgphoto2-2  2.4.2-ubuntu4
libgphoto2-port0  2.4.2-ubuntu4

*** Bug 212367 has been marked as a duplicate of this bug. ***

Here is the gdb backtrace:

#1  0xb47105e3 in gp_abilities_list_reset (list=0x80c36f8) at gphoto2-abilities-list.c:558
No locals.
#2  0xb471062c in gp_abilities_list_free (list=0x80c36f8) at gphoto2-abilities-list.c:136
        r = 0
#3  0xb487f9b0 in ~KCamera (this=0x82e1040, __in_chrg=<value optimized out>) at /var/tmp/portage/kde-base/kamera-4.3.2/work/kamera-4.3.2/kamera/kcontrol/kameradevice.cpp:73
No locals.
#4  0xb487934f in KKameraConfig::slot_removeCamera (this=0x81bf4b0) at /var/tmp/portage/kde-base/kamera-4.3.2/work/kamera-4.3.2/kamera/kcontrol/kamera.cpp:332
        m_device = 0x82e1040
        name = {static null = {<No data fields>}, static shared_null = {ref = {_q_value = 3216}, alloc = 0, size = 0, data = 0xb795f41a, clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {
              0}}, static shared_empty = {ref = {_q_value = 68}, alloc = 0, size = 0, data = 0xb795f42e, clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, d = 0x80cf030,
          static codecForCStrings = 0x0}
#5  0xb487b61b in KKameraConfig::qt_metacall (this=0x81bf4b0, _c=QMetaObject::InvokeMetaMethod, _id=37, _a=0xbfffcc48) at /var/tmp/portage/kde-base/kamera-4.3.2/work/kamera-4.3.2_build/kamera/kcontrol/kamera.moc:85
No locals.
#6  0xb78c7f92 in QMetaObject::activate(QObject*, int, int, void**) () from /usr/lib/qt4/libQtCore.so.4
No symbol table info available.
#7  0xb78c8309 in QMetaObject::activate(QObject*, QMetaObject const*, int, int, void**) () from /usr/lib/qt4/libQtCore.so.4
No symbol table info available.
#8  0xb703e572 in QAction::triggered(bool) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#9  0xb703f846 in QAction::activate(QAction::ActionEvent) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#10 0xb7461273 in QToolButton::nextCheckState() () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#11 0xb738d674 in QAbstractButtonPrivate::click() () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#12 0xb738d929 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#13 0xb746170d in QToolButton::mouseReleaseEvent(QMouseEvent*) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#14 0xb7098ee2 in QWidget::event(QEvent*) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#15 0xb738c64f in QAbstractButton::event(QEvent*) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#16 0xb7463f0b in QToolButton::event(QEvent*) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#17 0xb704407c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#18 0xb704a957 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#19 0xb7dc9aab in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
No symbol table info available.
#20 0xb78b5e3f in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/qt4/libQtCore.so.4
No symbol table info available.
#21 0xb704bf64 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#22 0xb70aef5e in QETWidget::translateMouseEvent(_XEvent const*) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#23 0xb70ae300 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#24 0xb70d574d in QEventDispatcherX11::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#25 0xb78b44fa in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/qt4/libQtCore.so.4
No symbol table info available.
#26 0xb78b46da in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/qt4/libQtCore.so.4
No symbol table info available.
#27 0xb74ab444 in QDialog::exec() () from /usr/lib/qt4/libQtGui.so.4
No symbol table info available.
#28 0xb7fdd36e in kdemain () from /usr/lib/libkdeinit4_kcmshell4.so
No symbol table info available.
#29 0x0804875b in main ()

there was an unitialied variable, m_abilitieslist

fixed in Revision 1055863

~/projects/kdegraphics/kamera/kcontrol> svn diff -c1055863
Index: kameradevice.cpp
===================================================================
--- kameradevice.cpp    (Revision 1055862)
+++ kameradevice.cpp    (Revision 1055863)
@@ -62,6 +62,7 @@
        m_model = name;
        m_path  = path;
        m_camera = NULL;
+       m_abilitylist = NULL;
 }
 
 KCamera::~KCamera()

*** Bug 220477 has been marked as a duplicate of this bug. ***

*** Bug 220192 has been marked as a duplicate of this bug. ***