The application Plasma Workspace (plasma) crashed and caused the signal 11 (SIGSEGV)

[tdn]

Periodically Plasma crashes. Here is the backtrace.

This backtrace appears to be of no use.
This is probably because your packages are built in a way which prevents creation of proper backtraces, or the stack frame was seriously corrupted in the crash.

[Thread debugging using libthread_db enabled]
[New Thread 0x7f36542dd790 (LWP 4091)]
[New Thread 0x7f3630c7a950 (LWP 4098)]
[New Thread 0x7f36324be950 (LWP 4094)]
[New Thread 0x7f3632ed6950 (LWP 4092)]
0x00007f364ec8fd21 in nanosleep () from /lib/libc.so.6
[Current thread is 0 (LWP 4091)]

Thread 4 (Thread 0x7f3632ed6950 (LWP 4092)):
#0 0x00007f364ecc6742 in select () from /lib/libc.so.6
#1 0x00007f364f837f06 in ?? () from /usr/lib/libQtCore.so.4
#2 0x00007f364f770952 in ?? () from /usr/lib/libQtCore.so.4
#3 0x00007f364c1513ba in start_thread () from /lib/libpthread.so.0
#4 0x00007f364eccdfcd in clone () from /lib/libc.so.6
#5 0x0000000000000000 in ?? ()

Thread 3 (Thread 0x7f36324be950 (LWP 4094)):
#0 0x00007f364c1552e9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1 0x00007f364f771939 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#2 0x00007f3652f2d4cc in ?? () from /usr/lib/libQtNetwork.so.4
#3 0x00007f364f770952 in ?? () from /usr/lib/libQtCore.so.4
#4 0x00007f364c1513ba in start_thread () from /lib/libpthread.so.0
#5 0x00007f364eccdfcd in clone () from /lib/libc.so.6
#6 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f3630c7a950 (LWP 4098)):
#0 0x00007f364c1552e9 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/libpthread.so.0
#1 0x00007f364f771939 in QWaitCondition::wait () from /usr/lib/libQtCore.so.4
#2 0x00007f3634242d4e in RenderThread::run (this=0x1439688) at /build/buildd/kdebase-workspace-4.2.2/plasma/wallpapers/image/renderthread.cpp:91
#3 0x00007f364f770952 in ?? () from /usr/lib/libQtCore.so.4
#4 0x00007f364c1513ba in start_thread () from /lib/libpthread.so.0
#5 0x00007f364eccdfcd in clone () from /lib/libc.so.6
#6 0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f36542dd790 (LWP 4091)):
#0 0x00007f364ec8fd21 in nanosleep () from /lib/libc.so.6
#1 0x00007f364ec8fb47 in sleep () from /lib/libc.so.6
#2 0x00007f36526c0b1f in ?? () from /usr/lib/libkdeui.so.5
#3 0x00007f36526c142a in KCrash::defaultCrashHandler () from /usr/lib/libkdeui.so.5
#4 <signal handler called>
#5 0x00007f364ec6c29c in memcpy () from /lib/libc.so.6
#6 0x00007f364f79482c in QListData::detach2 () from /usr/lib/libQtCore.so.4
#7 0x00007f36357f76f3 in ?? () from /usr/lib/kde4/plasma_applet_networkmanagement.so
#8 0x00007f36357f658f in ?? () from /usr/lib/kde4/plasma_applet_networkmanagement.so
#9 0x00007f36358079cc in ?? () from /usr/lib/kde4/plasma_applet_networkmanagement.so
#10 0x00007f36357f4700 in ?? () from /usr/lib/kde4/plasma_applet_networkmanagement.so
#11 0x00007f364f86f1f2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#12 0x00007f36357f86f8 in ?? () from /usr/lib/kde4/plasma_applet_networkmanagement.so
#13 0x00007f36357f4633 in ?? () from /usr/lib/kde4/plasma_applet_networkmanagement.so
#14 0x00007f36357f46a5 in ?? () from /usr/lib/kde4/plasma_applet_networkmanagement.so
#15 0x00007f364f86f1f2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#16 0x00007f36355d3854 in NetworkManagerSettings::connectionAdded () from /usr/lib/libknmdbus.so.4
#17 0x00007f36355d51f3 in NetworkManagerSettings::onConnectionAdded () from /usr/lib/libknmdbus.so.4
#18 0x00007f36355d53f4 in NetworkManagerSettings::qt_metacall () from /usr/lib/libknmdbus.so.4
#19 0x00007f364f86f1f2 in QMetaObject::activate () from /usr/lib/libQtCore.so.4
#20 0x00007f36355d3282 in OrgFreedesktopNetworkManagerSettingsInterface::NewConnection () from /usr/lib/libknmdbus.so.4
#21 0x00007f36355d342c in OrgFreedesktopNetworkManagerSettingsInterface::qt_metacall () from /usr/lib/libknmdbus.so.4
#22 0x00007f36355d5355 in NetworkManagerSettings::qt_metacall () from /usr/lib/libknmdbus.so.4
#23 0x00007f364fb77f83 in ?? () from /usr/lib/libQtDBus.so.4
#24 0x00007f364fb7fd0f in ?? () from /usr/lib/libQtDBus.so.4
#25 0x00007f364f869848 in QObject::event () from /usr/lib/libQtCore.so.4
#26 0x00007f364ff9e78d in QApplicationPrivate::notify_helper () from /usr/lib/libQtGui.so.4
#27 0x00007f364ffa697a in QApplication::notify () from /usr/lib/libQtGui.so.4
#28 0x00007f365265b26b in KApplication::notify () from /usr/lib/libkdeui.so.5
#29 0x00007f364f85975c in QCoreApplication::notifyInternal () from /usr/lib/libQtCore.so.4
#30 0x00007f364f85a3ca in QCoreApplicationPrivate::sendPostedEvents () from /usr/lib/libQtCore.so.4
#31 0x00007f364f8831e3 in ?? () from /usr/lib/libQtCore.so.4
#32 0x00007f364a52120a in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#33 0x00007f364a5248e0 in ?? () from /usr/lib/libglib-2.0.so.0
#34 0x00007f364a524a7c in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#35 0x00007f364f882e6f in QEventDispatcherGlib::processEvents () from /usr/lib/libQtCore.so.4
#36 0x00007f3650036bef in ?? () from /usr/lib/libQtGui.so.4
#37 0x00007f364f858002 in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#38 0x00007f364f8583cd in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#39 0x00007f364f85a694 in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#40 0x00007f3653fba9bb in kdemain (argc=1, argv=0x7fff5c41acc8) at /build/buildd/kdebase-workspace-4.2.2/plasma/shells/desktop/main.cpp:54
#41 0x00007f364ec065a6 in __libc_start_main () from /lib/libc.so.6
#42 0x00000000004007c9 in _start () at ../sysdeps/x86_64/elf/start.S:113
#0 0x00007f364ec8fd21 in nanosleep () from /lib/libc.so.6

[Fabio Marconi (fabiomarconi)]

Thank you for taking the time to report this bug and helping to make Ubuntu better.
Is this bug reproducible with the latest Lucid packages ?
Tanks in advance.