Bug 328174

Application: kded4 (4.11.2)
KDE Platform Version: 4.11.2
Qt Version: 4.8.4
Operating System: Linux 3.11.0-13-generic x86_64
Distribution: Ubuntu 13.10

-- Information about the crash:
- What I was doing when the application crashed:

This has happened several times, and sometimes KDE doesn't even login. It freezes when reaching the K logo, requiring a hard reset. I can't even switch to another console terminal.

-- 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 0x7faeaefb57c0 (LWP 3536))]

Thread 5 (Thread 0x7fae940e3700 (LWP 3559)):
#0  0x00007faeaa00b05f in __pthread_mutex_unlock_usercnt (mutex=0x7fae8c000a60, decr=<optimized out>) at pthread_mutex_unlock.c:52
#1  0x00007faea996c3d1 in g_mutex_unlock () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faea992c5b6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faea992c7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007faeadc57a76 in QEventDispatcherGlib::processEvents (this=0x7fae8c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#5  0x00007faeadc295ef in QEventLoop::processEvents (this=this@entry=0x7fae940e2db0, flags=...) at kernel/qeventloop.cpp:149
#6  0x00007faeadc298e5 in QEventLoop::exec (this=this@entry=0x7fae940e2db0, flags=...) at kernel/qeventloop.cpp:204
#7  0x00007faeadb2888f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#8  0x00007faeadb2af2f in QThreadPrivate::start (arg=0x202a710) at thread/qthread_unix.cpp:338
#9  0x00007faeaa007f6e in start_thread (arg=0x7fae940e3700) at pthread_create.c:311
#10 0x00007faeac82c9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 4 (Thread 0x7fae8b29e700 (LWP 3631)):
#0  0x00007faeac81ff7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007faea992c6a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faea992c7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faeadc57a76 in QEventDispatcherGlib::processEvents (this=0x7fae840008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007faeadc295ef in QEventLoop::processEvents (this=this@entry=0x7fae8b29dd70, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007faeadc298e5 in QEventLoop::exec (this=this@entry=0x7fae8b29dd70, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007faeadb2888f in QThread::exec (this=this@entry=0x2089eb0) at thread/qthread.cpp:542
#7  0x00007faeadc0ad13 in QInotifyFileSystemWatcherEngine::run (this=0x2089eb0) at io/qfilesystemwatcher_inotify.cpp:265
#8  0x00007faeadb2af2f in QThreadPrivate::start (arg=0x2089eb0) at thread/qthread_unix.cpp:338
#9  0x00007faeaa007f6e in start_thread (arg=0x7fae8b29e700) at pthread_create.c:311
#10 0x00007faeac82c9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 3 (Thread 0x7fae7a5b5700 (LWP 3742)):
#0  timerSourcePrepareHelper (src=<optimized out>, timeout=0x7fae7a5b4bb4) at kernel/qeventdispatcher_glib.cpp:142
#1  0x00007faeadc578d5 in timerSourcePrepare (source=<optimized out>, timeout=<optimized out>) at kernel/qeventdispatcher_glib.cpp:169
#2  0x00007faea992bd4d in g_main_context_prepare () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faea992c5c3 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007faea992c7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007faeadc57a76 in QEventDispatcherGlib::processEvents (this=0x7fae6c0008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#6  0x00007faeadc295ef in QEventLoop::processEvents (this=this@entry=0x7fae7a5b4d70, flags=...) at kernel/qeventloop.cpp:149
#7  0x00007faeadc298e5 in QEventLoop::exec (this=this@entry=0x7fae7a5b4d70, flags=...) at kernel/qeventloop.cpp:204
#8  0x00007faeadb2888f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#9  0x00007fae916effd7 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#10 0x00007faeadb2af2f in QThreadPrivate::start (arg=0x2204940) at thread/qthread_unix.cpp:338
#11 0x00007faeaa007f6e in start_thread (arg=0x7fae7a5b5700) at pthread_create.c:311
#12 0x00007faeac82c9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 2 (Thread 0x7fae79db4700 (LWP 3743)):
#0  0x00007faeac81ff7d in poll () at ../sysdeps/unix/syscall-template.S:81
#1  0x00007faea992c6a4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007faea992c7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007faeadc57a76 in QEventDispatcherGlib::processEvents (this=0x7fae600008c0, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#4  0x00007faeadc295ef in QEventLoop::processEvents (this=this@entry=0x7fae79db3db0, flags=...) at kernel/qeventloop.cpp:149
#5  0x00007faeadc298e5 in QEventLoop::exec (this=this@entry=0x7fae79db3db0, flags=...) at kernel/qeventloop.cpp:204
#6  0x00007faeadb2888f in QThread::exec (this=<optimized out>) at thread/qthread.cpp:542
#7  0x00007faeadb2af2f in QThreadPrivate::start (arg=0x220c9a0) at thread/qthread_unix.cpp:338
#8  0x00007faeaa007f6e in start_thread (arg=0x7fae79db4700) at pthread_create.c:311
#9  0x00007faeac82c9cd in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113

Thread 1 (Thread 0x7faeaefb57c0 (LWP 3536)):
[KCrash Handler]
#6  KScreen::Mode::size (this=this@entry=0x0) at /build/buildd/libkscreen-1.0.1/src/mode.cpp:83
#7  0x00007fae92a14f99 in Generator::biggestOutput (this=this@entry=0x200efb0, outputs=...) at /build/buildd/kscreen-1.0.1/kded/generator.cpp:402
#8  0x00007fae92a16be0 in Generator::laptop (this=0x200efb0, outputs=...) at /build/buildd/kscreen-1.0.1/kded/generator.cpp:303
#9  0x00007fae92a1743d in Generator::idealConfig (this=0x200efb0) at /build/buildd/kscreen-1.0.1/kded/generator.cpp:84
#10 0x00007fae92a0f297 in KScreenDaemon::applyIdealConfig (this=this@entry=0x204b260) at /build/buildd/kscreen-1.0.1/kded/daemon.cpp:118
#11 0x00007fae92a0f4ce in KScreenDaemon::applyConfig (this=0x204b260) at /build/buildd/kscreen-1.0.1/kded/daemon.cpp:98
#12 0x00007faeadc3ea58 in QMetaObject::activate (sender=0x200efb0, m=<optimized out>, local_signal_index=<optimized out>, argv=0x0) at kernel/qobject.cpp:3539
#13 0x00007faeadc3ea58 in QMetaObject::activate (sender=sender@entry=0x202eab0, m=m@entry=0x7fae92c1db40 <Device::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x0) at kernel/qobject.cpp:3539
#14 0x00007fae92a17f54 in ready (this=0x202eab0) at /build/buildd/kscreen-1.0.1/obj-x86_64-linux-gnu/kded/device.moc:113
#15 Device::setReady (this=this@entry=0x202eab0) at /build/buildd/kscreen-1.0.1/kded/device.cpp:80
#16 0x00007fae92a18f2e in setReady (this=0x202eab0) at /build/buildd/kscreen-1.0.1/kded/device.cpp:148
#17 fetchIsDocked (this=0x202eab0) at /build/buildd/kscreen-1.0.1/kded/device.cpp:157
#18 Device::isLidClosedFetched (this=0x202eab0, watcher=0x21d03c0) at /build/buildd/kscreen-1.0.1/kded/device.cpp:152
#19 0x00007faeadc3ea58 in QMetaObject::activate (sender=0x21d03c0, m=m@entry=0x7faeab207640 <QDBusPendingCallWatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7fffd9dfdcb0) at kernel/qobject.cpp:3539
#20 0x00007faeaafe8b8f in QDBusPendingCallWatcher::finished (this=<optimized out>, _t1=0x21d03c0) at .moc/release-shared/moc_qdbuspendingcall.cpp:106
#21 0x00007faeadc42dce in QObject::event (this=0x21d03c0, e=<optimized out>) at kernel/qobject.cpp:1194
#22 0x00007faeacfc7dfc in QApplicationPrivate::notify_helper (this=this@entry=0x1e40a50, receiver=receiver@entry=0x21d03c0, e=e@entry=0x227f090) at kernel/qapplication.cpp:4567
#23 0x00007faeacfce470 in QApplication::notify (this=this@entry=0x7fffd9dfe410, receiver=receiver@entry=0x21d03c0, e=e@entry=0x227f090) at kernel/qapplication.cpp:4353
#24 0x00007faeae9a8a6a in KApplication::notify (this=0x7fffd9dfe410, receiver=0x21d03c0, event=0x227f090) at ../../kdeui/kernel/kapplication.cpp:311
#25 0x00007faeadc2a8bd in QCoreApplication::notifyInternal (this=0x7fffd9dfe410, receiver=receiver@entry=0x21d03c0, event=event@entry=0x227f090) at kernel/qcoreapplication.cpp:946
#26 0x00007faeadc2de1f in sendEvent (event=0x227f090, receiver=0x21d03c0) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#27 QCoreApplicationPrivate::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0, data=0x1da8150) at kernel/qcoreapplication.cpp:1570
#28 0x00007faeadc2e2c3 in QCoreApplication::sendPostedEvents (receiver=receiver@entry=0x0, event_type=event_type@entry=0) at kernel/qcoreapplication.cpp:1463
#29 0x00007faeadc58073 in sendPostedEvents () at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:236
#30 postEventSourceDispatch (s=0x1e3f020) at kernel/qeventdispatcher_glib.cpp:279
#31 0x00007faea992c3b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007faea992c708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007faea992c7ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007faeadc57a55 in QEventDispatcherGlib::processEvents (this=0x1daa440, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#35 0x00007faead0699d6 in QGuiEventDispatcherGlib::processEvents (this=<optimized out>, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#36 0x00007faeadc295ef in QEventLoop::processEvents (this=this@entry=0x7fffd9dfe2e0, flags=...) at kernel/qeventloop.cpp:149
#37 0x00007faeadc298e5 in QEventLoop::exec (this=this@entry=0x7fffd9dfe2e0, flags=...) at kernel/qeventloop.cpp:204
#38 0x00007faeadc2ee5b in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#39 0x00007faeacfc634c in QApplication::exec () at kernel/qapplication.cpp:3828
#40 0x00007fae9998f95b in kdemain (argc=1, argv=0x1e11070) at ../../kded/kded.cpp:925
#41 0x00000000004083f5 in launch (argc=argc@entry=1, _name=_name@entry=0x40b007 "kded4", args=<optimized out>, args@entry=0x0, cwd=cwd@entry=0x0, envc=envc@entry=0, envs=<optimized out>, envs@entry=0x0, reset_env=reset_env@entry=false, tty=tty@entry=0x0, avoid_loops=avoid_loops@entry=false, startup_id_str=startup_id_str@entry=0x40ae96 "0") at ../../kinit/kinit.cpp:738
#42 0x00000000004059a6 in main (argc=4, argv=<optimized out>, envp=0x7fffd9dfeb70) at ../../kinit/kinit.cpp:1853

Reported using DrKonqi