kded4/kdeinit4 crashes with segmentation fault (segfault) after logging in in Quetzal

[Oliver Klee]

I've updated my Kubuntu system from Precise Pangolin to Quantal Quetzal 12.10. The update went smooth. However, I now consistently get a segmentation fault in kded4 or kdeinit4 (one or the other) after I've logged in (using the graphic login). I can repeat this consistently by logging out and logging in again (without restarting my machine).

This is the information which I get for my crash (unfortunately, there are no additional debug symbols available for installation, it seems):

Application: KDE-Dienst (kdeinit4), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#5 0x00007f08b6d1d40c in ?? () from /usr/lib/kde4/kded_colord.so
#6 0x00007f08d0f7a43e in QObject::event (this=0xf9a9b0, e=<optimized out>) at kernel/qobject.cpp:1195
#7 0x00007f08d030ce9c in QApplicationPrivate::notify_helper (this=this@entry=0xcf71c0, receiver=receiver@entry=0xf9a9b0, e=e@entry=0xfacee0) at kernel/qapplication.cpp:4562
#8 0x00007f08d031130a in QApplication::notify (this=0x7fff20f5f600, receiver=0xf9a9b0, e=0xfacee0) at kernel/qapplication.cpp:4423
#9 0x00007f08d1cde1d6 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#10 0x00007f08d0f6556e in QCoreApplication::notifyInternal (this=0x7fff20f5f600, receiver=receiver@entry=0xf9a9b0, event=event@entry=0xfacee0) at kernel/qcoreapplication.cpp:915
#11 0x00007f08d0f693f1 in sendEvent (event=0xfacee0, receiver=0xf9a9b0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#12 QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0xc052b0) at kernel/qcoreapplication.cpp:1539
#13 0x00007f08d0f93a63 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#14 postEventSourceDispatch (s=0xcf56b0) at kernel/qeventdispatcher_glib.cpp:279
#15 0x00007f08cca63ab5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007f08cca63de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007f08cca63ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f08d0f93bf6 in QEventDispatcherGlib::processEvents (this=0xc077d0, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#19 0x00007f08d03b1c1e in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#20 0x00007f08d0f642bf in QEventLoop::processEvents (this=this@entry=0x7fff20f5f380, flags=...) at kernel/qeventloop.cpp:149
#21 0x00007f08d0f64548 in QEventLoop::exec (this=0x7fff20f5f380, flags=...) at kernel/qeventloop.cpp:204
#22 0x00007f08d0f69708 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1187
#23 0x00007f08bbecc3f0 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_kded4.so
#24 0x00000000004085a2 in _start ()

This still occurs even if I rename my ~/.kde/ and ~/.kderc before logging in.

[Oliver Klee (launchpad-oliverklee)]

Removing the kde-config-tablet does not help. So this does not seem to be a duplicate of #596189.

[Jonathan Thomas (echidnaman)]

From the backtrace it looks like a crash in the colord-kde KDE daemon module.

[Oliver Klee (launchpad-oliverklee)]

I also see the following line when calling dmesg:

[ 24.340699] kded4[3500] general protection ip:7fc546b1a40c sp:7fffb3da6640 error:0 in kded_colord.so[7fc546b07000+18000]

[Daniel Nicoletti (dantti)]

Does it crash if you start it from the terminal?
Did you try to reinstall colord-kde module?
Does System Settings -> Color module works for you?

This backtrace is really useless :(

[Oliver Klee (launchpad-oliverklee)]

Yes, it also crashes if I start it from the terminal:

klee@gonzales:~$ kded4
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
Fontconfig warning: "/etc/fonts/conf.d/50-user.conf", line 9: reading configurations from ~/.fonts.conf is deprecated.
QDBusObjectPath: invalid path "/modules/muon-notifier"
kded(10514): The kded module name ' "muon-notifier" ' is invalid!
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
Running Mixer_Backend destructor
KCrash: Attempting to start /usr/bin/kded4 from kdeinit
sock_file=/home/klee/.kde/socket-gonzales/kdeinit4__0
KCrash: Application 'kded4' crashing...
KCrash: Attempting to start /usr/lib/kde4/libexec/drkonqi from kdeinit
sock_file=/home/klee/.kde/socket-gonzales/kdeinit4__0
QSocketNotifier: Invalid socket 14 and type 'Read', disabling...

[Oliver Klee (launchpad-oliverklee)]

The System Settings -> Color module seems to work (at least it displays, and I can click around).

[Oliver Klee (launchpad-oliverklee)]

The crash does not occur after I have uninstalled colord-kde (and color), includes their configuration files.

However, if I reinstall colord-kde, I get the crash again.

[Daniel Nicoletti (dantti)]

ok,
please add this repo:
deb http://ddebs.ubuntu.com quantal main restricted universe multiverse
then install colord-kde-dbgsym, and please run:
gdb kded4 --nofork
run

when it crashes type: bt
and paste the new backtrace here.

Thanks.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Henrik Harmsen (henrik-harmsen)]

Same here.
This is on 12.10 kubuntu. Logging in via nomachine nx.

More backtrace from the crash deamon:

Application: KDE Daemon (kdeinit4), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f156e7e2780 (LWP 20953))]

Thread 2 (Thread 0x7f155c029700 (LWP 20955)):
#0 0x00007f15739dd303 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007f15708d9d84 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f15708d9ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f1574e09c16 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4 0x00007f1574dda2bf in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5 0x00007f1574dda548 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6 0x00007f1574cdbb10 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7 0x00007f1574dbc478 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8 0x00007f1574cdeaec in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9 0x00007f15711b2e9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#10 0x00007f15739e8cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f156e7e2780 (LWP 20953)):
[KCrash Handler]
#5 0x00007f157397859c in free () from /lib/x86_64-linux-gnu/libc.so.6
#6 0x00007f15756379a9 in XFree () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#7 0x00007f156148f7a6 in XRRUpdateConfiguration () from /usr/lib/x86_64-linux-gnu/libXrandr.so.2
#8 0x00007f1559e7befc in ?? () from /usr/lib/kde4/kded_wacomtablet.so
#9 0x00007f1575b56f1e in KApplication::x11EventFilter(_XEvent*) () from /usr/lib/libkdeui.so.5
#10 0x00007f15741ef7bc in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#11 0x00007f15741ff7f0 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#12 0x00007f1574227fa2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#13 0x00007f15708d9ab5 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007f15708d9de8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007f15708d9ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007f1574e09bf6 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#17 0x00007f1574227c1e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#18 0x00007f1574dda2bf in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#19 0x00007f1574dda548 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#20 0x00007f1572156bc6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtDBus.so.4
#21 0x00007f15721447fb in QDBusConnection::call(QDBusMessage const&, QDBus::CallMode, int) const () from /usr/lib/x86_64-linux-gnu/libQtDBus.so.4
#22 0x0000...

[Henrik Harmsen (henrik-harmsen)]

I uninstalled colord-kde and now I got this instead:

Application: KDE Daemon (kdeinit4), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f44ddbea780 (LWP 21904))]

Thread 5 (Thread 0x7f44cb431700 (LWP 21906)):
#0 0x00007f44e05be05d in pthread_mutex_unlock () from /lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00007f44dfd1ee51 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f44dfce1c5c in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f44dfce1ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f44e4211c16 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5 0x00007f44e41e22bf in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6 0x00007f44e41e2548 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7 0x00007f44e40e3b10 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8 0x00007f44e41c4478 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9 0x00007f44e40e6aec in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#10 0x00007f44e05bae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#11 0x00007f44e2df0cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#12 0x0000000000000000 in ?? ()

Thread 4 (Thread 0x7f44bfcfe700 (LWP 21918)):
#0 0x00007f44e05bcf69 in pthread_mutex_lock () from /lib/x86_64-linux-gnu/libpthread.so.0
#1 0x00007f44dfd1ee21 in g_mutex_lock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f44dfce1193 in g_main_context_release () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f44dfce1d35 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f44dfce21e2 in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5 0x00007f44bffea4a6 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#6 0x00007f44dfd05645 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#7 0x00007f44e05bae9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#8 0x00007f44e2df0cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6
#9 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f44bf2f1700 (LWP 21921)):
#0 0x00007f44e2de5303 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1 0x00007f44dfce1d84 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f44dfce1ea4 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f44e4211c16 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4 0x00007f44e41e22bf in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5 0x00007f44e41e2548 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6 0x00007f44e40e3b10 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7 0x00007f44c8872352 in KCupsConnection::run() () from /...

[Henrik Harmsen (henrik-harmsen)]

Also got this:

Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[KCrash Handler]
#5 0x00007f5decb7259c in free () from /lib/x86_64-linux-gnu/libc.so.6
#6 0x00007f5deaca69a9 in XFree () from /usr/lib/x86_64-linux-gnu/libX11.so.6
#7 0x00007f5dea8477a6 in XRRUpdateConfiguration () from /usr/lib/x86_64-linux-gnu/libXrandr.so.2
#8 0x00007f5decf1cee0 in ?? () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#9 0x00007f5decf0e848 in ?? () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#10 0x00007f5de7c727bc in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#11 0x00007f5de7c827f0 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#12 0x00007f5de7cab9d9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#13 0x00007f5de885d2bf in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#14 0x00007f5de885d548 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#15 0x00007f5de8862708 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#16 0x00007f5decf10ed4 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#17 0x00007f5decb1076d in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#18 0x00000000004006d1 in _start ()

Maybe this is a variant of
https://bugs.launchpad.net/bugs/985202

[Henrik Harmsen (henrik-harmsen)]

kdeinit4 stopped crashing after I switched from nx to x2go. So it seems I was actually bitten by https://bugs.launchpad.net/bugs/985202 even though it looked like it was this bug. However, maybe others have the same problem with this bug.,

[Bill Weinel (bweinel)]

kded4 in saucy salamander crashes immediatly after logging in and getting to the desktop.

-------------------------------------- backtrace ------------------------------
Application: KDE Daemon (kded4), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f615aad57c0 (LWP 1902))]

Thread 6 (Thread 0x7f613fd68700 (LWP 1904)):
#0 0x00007f6158333f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f61554406a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f61554407ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f615976ba76 in QEventDispatcherGlib::processEvents (this=0x7f61380008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4 0x00007f615973d5ef in QEventLoop::processEvents (this=this@entry=0x7f613fd67db0, flags=...) at kernel/qeventloop.cpp:149
#5 0x00007f615973d8e5 in QEventLoop::exec (this=this@entry=0x7f613fd67db0, flags=...) at kernel/qeventloop.cpp:204
#6 0x00007f615963c88f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#7 0x00007f615963ef2f in QThreadPrivate::start (arg=0x16de170) at thread/qthread_unix.cpp:338
#8 0x00007f6155b1bf6e in start_thread (arg=0x7f613fd68700) at pthread_create.c:311
#9 0x00007f61583409cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 5 (Thread 0x7f612f43b700 (LWP 1915)):
#0 0x00007f6158333f7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007f61554406a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f6155440b0a in g_main_loop_run () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f612f936b66 in ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
#4 0x00007f61554650f5 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5 0x00007f6155b1bf6e in start_thread (arg=0x7f612f43b700) at pthread_create.c:311
#6 0x00007f61583409cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7f612ea2e700 (LWP 1916)):
#0 0x00007f6155b1f05f in __pthread_mutex_unlock_usercnt (mutex=0x7f611c000a60, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1 0x00007f61554803d1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007f615543f830 in g_main_context_acquire () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007f6155440565 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007f61554407ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5 0x00007f615976ba76 in QEventDispatcherGlib::processEvents (this=0x7f611c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6 0x00007f615973d5ef in QEventLoop::processEvents (this=this@entry=0x7f612ea2dd70, flags=...) at kernel/qeventloop.cpp:149
#7 0x00007f615973d8e5 in QEventLoop::exec (this=this@entry=0x7f612ea2dd70, flags=...) at kernel/qeventloop.cpp:204
#8 0x00007f615963c88f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9 0x00007f613d374fd7 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#10 0x00007f615963ef2f in QThreadPrivate::start (arg=0x1710170) at thread/qthread_unix.cpp:338
#11 0x00007f6155b1bf6e in s...