Application: kcmshell4 ()
KDE Platform Version: 4.4.2 (KDE 4.4.2)
Qt Version: 4.6.2
Operating System: Linux 2.6.32-24-generic i686
Distribution: Ubuntu 10.04.1 LTS

-- Information about the crash:
K3B complained that it couldn't find optical drives. Usually it succeeded finding the correct device and buring worked as expected.

I opened the settings in K3B, then the Devices section. The list showed no drives (although one is physically present). Whenever I click the button “Modify Permissions…” the next thing I see is the crash information about KDE Control Module. This happens everytime.

The system is Kubuntu 10.04 without self-compiled parts.

The crash can be reproduced every time.

 -- Backtrace:
Application: KDE Control Module (kcmshell4), signal: Aborted
[Current thread is 1 (Thread 0xb77bc930 (LWP 2333))]

Thread 2 (Thread 0xb4fd8b70 (LWP 2334)):
#0  0x009c4f5b in pthread_mutex_lock () from /lib/tls/i686/cmov/libpthread.so.0
#1  0x00d64ba6 in pthread_mutex_lock () from /lib/tls/i686/cmov/libc.so.6
#2  0x00ed151a in g_main_context_check () from /lib/libglib-2.0.so.0
#3  0x00ed20ce in ?? () from /lib/libglib-2.0.so.0
#4  0x00ed24b8 in g_main_context_iteration () from /lib/libglib-2.0.so.0
#5  0x0111c60f in QEventDispatcherGlib::processEvents (this=0x881a000, flags=...) at kernel/qeventdispatcher_glib.cpp:414
#6  0x010ef059 in QEventLoop::processEvents (this=0xb4fd8290, flags=) at kernel/qeventloop.cpp:149
#7  0x010ef4aa in QEventLoop::exec (this=0xb4fd8290, flags=...) at kernel/qeventloop.cpp:201
#8  0x00feb5a8 in QThread::exec (this=0x87d8798) at thread/qthread.cpp:487
#9  0x010cec1b in QInotifyFileSystemWatcherEngine::run (this=0x87d8798) at io/qfilesystemwatcher_inotify.cpp:248
#10 0x00fee32e in QThreadPrivate::start (arg=0x87d8798) at thread/qthread_unix.cpp:248
#11 0x009c296e in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
#12 0x00d57a4e in clone () from /lib/tls/i686/cmov/libc.so.6

Thread 1 (Thread 0xb77bc930 (LWP 2333)):
[KCrash Handler]
#6  0x00533422 in __kernel_vsyscall ()
#7  0x00cb4651 in raise () from /lib/tls/i686/cmov/libc.so.6
#8  0x00cb7a82 in abort () from /lib/tls/i686/cmov/libc.so.6
#9  0x00ed9026 in g_logv () from /lib/libglib-2.0.so.0
#10 0x00ed9056 in g_log () from /lib/libglib-2.0.so.0
#11 0x062c7c1e in dbus_connection_setup_with_g_main () from /usr/lib/libdbus-glib-1.so.2
#12 0x035ff68f in ?? () from /usr/lib/libeggdbus-1.so.0
#13 0x031f1e68 in g_object_newv () from /usr/lib/libgobject-2.0.so.0
#14 0x031f290c in g_object_new_valist () from /usr/lib/libgobject-2.0.so.0
#15 0x031f2a27 in g_object_new () from /usr/lib/libgobject-2.0.so.0
#16 0x035ff350 in egg_dbus_connection_get_for_bus () from /usr/lib/libeggdbus-1.so.0
#17 0x07c5b8a9 in ?? () from /usr/lib/libpolkit-gobject-1.so.0
#18 0x0320c9c2 in g_type_create_instance () from /usr/lib/libgobject-2.0.so.0
#19 0x031f0a18 in ?? () from /usr/lib/libgobject-2.0.so.0
#20 0x031f218a in g_object_newv () from /usr/lib/libgobject-2.0.so.0
#21 0x031f2a48 in g_object_new () from /usr/lib/libgobject-2.0.so.0
#22 0x07c5b4f7 in polkit_authority_get () from /usr/lib/libpolkit-gobject-1.so.0
#23 0x07c04d21 in PolkitQt1::Authority::Private::init() () from /usr/lib/libpolkit-qt-core-1.so.0
#24 0x07c05e6a in PolkitQt1::Authority::Authority(_PolkitAuthority*, QObject*) () from /usr/lib/libpolkit-qt-core-1.so.0
#25 0x07c05f1d in PolkitQt1::Authority::instance(_PolkitAuthority*) () from /usr/lib/libpolkit-qt-core-1.so.0
#26 0x00e16b56 in KAuth::Polkit1Backend::setupAction (this=0x890eaf0, action=...) at ../../kdecore/auth/backends/polkit-1/Polkit1Backend.cpp:75
#27 0x0070261e in Action (this=0x8930088, name=...) at ../../kdecore/auth/kauthaction.cpp:62
#28 0x003b6445 in KCModule::setNeedsAuthorization (this=0x87d48a8, needsAuth=true) at ../../kdeui/widgets/kcmodule.cpp:140
#29 0x00f64f90 in ?? () from /usr/lib/kde4/kcm_k3bsetup.so
#30 0x00f6988d in QObject* KPluginFactory::createInstance<K3bSetup, QWidget>(QWidget*, QObject*, QList<QVariant> const&) () from /usr/lib/kde4/kcm_k3bsetup.so
#31 0x007ef05e in KPluginFactory::create (this=0x87d3340, iface=0xf6eeae "1slotBurningGroupChanged()", parentWidget=0x0, parent=0x87caea0, args=..., keyword=...)
    at ../../kdecore/util/kpluginfactory.cpp:191
#32 0x00a2fcca in KPluginFactory::create<KCModule> (mod=..., report=KCModuleLoader::Inline, parent=0x87caea0, args=...) at ../../kdecore/util/kpluginfactory.h:515
#33 KService::createInstance<KCModule> (mod=..., report=KCModuleLoader::Inline, parent=0x87caea0, args=...) at ../../kdecore/services/kservice.h:517
#34 KService::createInstance<KCModule> (mod=..., report=KCModuleLoader::Inline, parent=0x87caea0, args=...) at ../../kdecore/services/kservice.h:494
#35 KService::createInstance<KCModule> (mod=..., report=KCModuleLoader::Inline, parent=0x87caea0, args=...) at ../../kdecore/services/kservice.h:537
#36 KCModuleLoader::loadModule (mod=..., report=KCModuleLoader::Inline, parent=0x87caea0, args=...) at ../../kutils/kcmoduleloader.cpp:89
#37 0x00a351ed in KCModuleProxyPrivate::loadModule (this=0x87e9ca8) at ../../kutils/kcmoduleproxy.cpp:106
#38 0x00a35ee3 in KCModuleProxy::realModule (this=0x87caea0) at ../../kutils/kcmoduleproxy.cpp:83
#39 0x00a35f82 in KCModuleProxy::useRootOnlyMessage (this=0x87caea0) at ../../kutils/kcmoduleproxy.cpp:315
#40 0x00a322b8 in KCMultiDialog::addModule (this=0x87b35b8, moduleInfo=..., parentItem=0x0, args=...) at ../../kutils/kcmultidialog.cpp:340
#41 0x00f83701 in kdemain () from /usr/lib/libkdeinit4_kcmshell4.so
#42 0x0804860b in _start ()

Reported using DrKonqi