Crash in 4-14 Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault

Dear all

Im running

hofer@rudix:~/Desktop$ lsb_release -a
LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch:core-4.1-amd64:core-4.1-noarch:security-4.0-amd64:security-4.0-noarch:security-4.1-amd64:security-4.1-noarch
Distributor ID: Ubuntu
Description: Ubuntu 14.04.1 LTS
Release: 14.04
Codename: trusty
hofer@rudix:~/Desktop$ uname -a
Linux rudix 3.13.0-34-generic #60-Ubuntu SMP Wed Aug 13 15:45:27 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
hofer@rudix:~/Desktop$ kate --version
Qt: 4.8.6
KDE Development Platform: 4.14.0
Kate: 3.14.0

Since recently, I often encounter a crash of the Plasma Desktop right after powering up. The Desktop loads, then after ~15 sec the Desktop crashes. Then it flickers once or twice, it seems to try to reload, but doesn't succeed.

I leaves me with a black background and a kshell, which is still available. From there I can load applications, but not the Desktop anymore.

From the crashlog it seems to be something with cups .. ?

For further investigation, I'm happy to help.

BR, Ruedi

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Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fcb716e47c0 (LWP 2823))]

Thread 9 (Thread 0x7fcb451ec700 (LWP 2962)):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:185
#1 0x00007fcb6a397ffb in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2 0x00007fcb6a398039 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3 0x00007fcb64f0f182 in start_thread (arg=0x7fcb451ec700) at pthread_create.c:312
#4 0x00007fcb70fda38d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 8 (Thread 0x7fcaba0dd700 (LWP 3003)):
#0 0x00007fcb70fcd03d in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007fcb647fdfe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007fcb647fe0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007fcb6dbad7be in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4 0x00007fcb6db7f0af in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5 0x00007fcb6db7f3a5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6 0x00007fcb6da7bc5f in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7 0x00007fcb6db60823 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8 0x00007fcb6da7e32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9 0x00007fcb64f0f182 in start_thread (arg=0x7fcaba0dd700) at pthread_create.c:312
#10 0x00007fcb70fda38d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 7 (Thread 0x7fcab9264700 (LWP 3004)):
#0 0x00007fcb70fcb73d in read () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007fcb6483ec20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007fcb647fdb14 in g_main_context_check () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007fcb647fdf7b in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007fcb647fe0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5 0x00007fcb6dbad7be in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6 0x00007fcb6db7f0af in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7 0x00007fcb6db7f3a5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8 0x00007fcb6da7bc5f in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9 0x00007fcb6db60823 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#10 0x00007fcb6da7e32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#11 0x00007fcb64f0f182 in start_thread (arg=0x7fcab9264700) at pthread_create.c:312
#12 0x00007fcb70fda38d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 6 (Thread 0x7fcab34fa700 (LWP 3299)):
#0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007fcb6da7e7f4 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2 0x00007fcb6da720fa in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3 0x00007fcb6da7e32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4 0x00007fcb64f0f182 in start_thread (arg=0x7fcab34fa700) at pthread_create.c:312
#5 0x00007fcb70fda38d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 5 (Thread 0x7fcab2cf9700 (LWP 3300)):
#0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007fcb6da7e7f4 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2 0x00007fcb6da720fa in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3 0x00007fcb6da7e32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4 0x00007fcb64f0f182 in start_thread (arg=0x7fcab2cf9700) at pthread_create.c:312
#5 0x00007fcb70fda38d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 4 (Thread 0x7fcab24f8700 (LWP 3301)):
#0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007fcb6da7e7f4 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2 0x00007fcb6da720fa in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3 0x00007fcb6da7e32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4 0x00007fcb64f0f182 in start_thread (arg=0x7fcab24f8700) at pthread_create.c:312
#5 0x00007fcb70fda38d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 3 (Thread 0x7fcab1cf7700 (LWP 3302)):
#0 pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:238
#1 0x00007fcb6da7e7f4 in QWaitCondition::wait(QMutex*, unsigned long) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#2 0x00007fcb6da720fa in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#3 0x00007fcb6da7e32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4 0x00007fcb64f0f182 in start_thread (arg=0x7fcab1cf7700) at pthread_create.c:312
#5 0x00007fcb70fda38d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 2 (Thread 0x7fca9f6bf700 (LWP 3681)):
#0 0x00007fcb70fcd03d in poll () at ../sysdeps/unix/syscall-template.S:81
#1 0x00007fcb647fdfe4 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007fcb647fe0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007fcb6dbad7be in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4 0x00007fcb6db7f0af in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5 0x00007fcb6db7f3a5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6 0x00007fcb6da7bc5f in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7 0x00007fca8ed01027 in KCupsConnection::run() () from /usr/lib/libkcupslib.so
#8 0x00007fcb6da7e32f in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9 0x00007fcb64f0f182 in start_thread (arg=0x7fca9f6bf700) at pthread_create.c:312
#10 0x00007fcb70fda38d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

Thread 1 (Thread 0x7fcb716e47c0 (LWP 2823)):
[KCrash Handler]
#5 0x00007fca8ed186f2 in JobModel::updateJob(int, KCupsJob const&) () from /usr/lib/libkcupslib.so
#6 0x00007fca8ed1c2b9 in JobModel::getJobFinished() () from /usr/lib/libkcupslib.so
#7 0x00007fca8ed1c905 in ?? () from /usr/lib/libkcupslib.so
#8 0x00007fcb6db98c1e in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9 0x00007fcb6cf19e2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#10 0x00007fcb6cf204a0 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#11 0x00007fcb6e845d1a in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#12 0x00007fcb6db804dd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#13 0x00007fcb6db83b3d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#14 0x00007fcb6dbadf83 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#15 0x00007fcb647fde04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007fcb647fe048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#17 0x00007fcb647fe0ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007fcb6dbad7a1 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#19 0x00007fcb6cfbbbb6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#20 0x00007fcb6db7f0af in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#21 0x00007fcb6db7f3a5 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#22 0x00007fcb6db84b79 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#23 0x00007fcb712e167c in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#24 0x00007fcb70f00ec5 in __libc_start_main (main=0x4006e0, argc=1, argv=0x7fffb5a853a8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffb5a85398) at libc-start.c:287
#25 0x000000000040070e in _start ()