Operating System: KDE neon 5.14
KDE Plasma Version: 5.15.0
KDE Frameworks Version: 5.55.0
Qt Version: 5.12.0
Kernel Version: 4.15.0-45-generic
OS Type: 64-bit
Processors: 4 × Intel® Core™ i7-6600U CPU @ 2.60GHz
Memory: 7.7 GiB of RAM

After an update, my Icon-Only-TaskManager stopped working.

When I hover over the taskmanager, the following error message pops up (screenshot: https://imgur.com/a/POq6Cnx):

Code: Select all

Error loading QML file: file:///usr/share/plasma/plasmoids/org.kde.plasma.taskmanager/contents/ui/main.qml:27:1: module "org.kde.plasma.private.taskmanager" is not installed

Today, my desktop went black and I can't switch activities anymore. I still can switch programs with ALT+TAB.

Further, my application launcher stopped working.

When I hover over the application launcher, the following error message pops up (screenshot: https://imgur.com/a/Q2gJC5t):

Code: Select all

Error loading QML file: file:///usr/share/plasma/plasmoids/org.kde.plasma.kickoff/contents/ui/Kickoff.qml:31:1: module "org.kde.plasma.private.kicker" is not installed

When I try to add a widget to the panel, Plasma closes unexpectedly.
Details: Executable: plasmashell PID: 17861 Signal: Segmentation fault (11) Time: 15.02.19 10:37:17

(Backtrace below)

Is there a way to repair KDE NEON?



Backtrace generated by the crash, when trying to add a widget:

Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fb983f94840 (LWP 17861))]

Thread 7 (Thread 0x7fb92bf8e700 (LWP 20354)):
#0 0x00007fb97d1cfbf9 in __GI___poll (fds=0x7fb924008920, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007fb977037539 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007fb97703764c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007fb97db1215b in QEventDispatcherGlib::processEvents (this=0x7fb924005830, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4 0x00007fb97dab364a in QEventLoop::exec (this=this@entry=0x7fb92bf8dd40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5 0x00007fb97d8db41a in QThread::exec (this=this@entry=0x559cf69cde90) at thread/qthread.cpp:531
#6 0x00007fb9816d32e5 in QQmlThreadPrivate::run (this=0x559cf69cde90) at qml/ftw/qqmlthread.cpp:148
#7 0x00007fb97d8dcbc2 in QThreadPrivate::start (arg=0x559cf69cde90) at thread/qthread_unix.cpp:361
#8 0x00007fb97cc9f6db in start_thread (arg=0x7fb92bf8e700) at pthread_create.c:463
#9 0x00007fb97d1dc88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fb940aa6700 (LWP 18303)):
#0 0x00007fb97d1cfbf9 in __GI___poll (fds=0x7fb93c003ce0, nfds=1, timeout=2861524) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007fb977037539 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007fb97703764c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007fb97db1215b in QEventDispatcherGlib::processEvents (this=0x7fb93c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4 0x00007fb97dab364a in QEventLoop::exec (this=this@entry=0x7fb940aa5d20, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5 0x00007fb97d8db41a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6 0x00007fb943403f77 in KCupsConnection::run() () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
#7 0x00007fb97d8dcbc2 in QThreadPrivate::start (arg=0x559cf525fe90) at thread/qthread_unix.cpp:361
#8 0x00007fb97cc9f6db in start_thread (arg=0x7fb940aa6700) at pthread_create.c:463
#9 0x00007fb97d1dc88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fb958c48700 (LWP 17956)):
#0 0x00007fb97cca59f3 in futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x559cf44789d8) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x559cf4478988, cond=0x559cf44789b0) at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x559cf44789b0, mutex=0x559cf4478988) at pthread_cond_wait.c:655
#3 0x00007fb9597a2b1b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4 0x00007fb9597a2847 in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5 0x00007fb97cc9f6db in start_thread (arg=0x7fb958c48700) at pthread_create.c:463
#6 0x00007fb97d1dc88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fb966dbc700 (LWP 17921)):
#0 0x00007fb97d1cb0b4 in __GI___libc_read (fd=10, buf=0x7fb966dbbb30, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:27
#1 0x00007fb97707bcd0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007fb977037027 in g_main_context_check () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007fb9770374e0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#4 0x00007fb97703764c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#5 0x00007fb97db1215b in QEventDispatcherGlib::processEvents (this=0x7fb95c000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#6 0x00007fb97dab364a in QEventLoop::exec (this=this@entry=0x7fb966dbbd40, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#7 0x00007fb97d8db41a in QThread::exec (this=this@entry=0x559cf44810f0) at thread/qthread.cpp:531
#8 0x00007fb9816d32e5 in QQmlThreadPrivate::run (this=0x559cf44810f0) at qml/ftw/qqmlthread.cpp:148
#9 0x00007fb97d8dcbc2 in QThreadPrivate::start (arg=0x559cf44810f0) at thread/qthread_unix.cpp:361
#10 0x00007fb97cc9f6db in start_thread (arg=0x7fb966dbc700) at pthread_create.c:463
#11 0x00007fb97d1dc88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fb96c973700 (LWP 17901)):
#0 0x00007fb97d1cfbf9 in __GI___poll (fds=0x7fb960004db0, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007fb977037539 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2 0x00007fb97703764c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3 0x00007fb97db1215b in QEventDispatcherGlib::processEvents (this=0x7fb960000b20, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#4 0x00007fb97dab364a in QEventLoop::exec (this=this@entry=0x7fb96c972d30, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#5 0x00007fb97d8db41a in QThread::exec (this=<optimized out>) at thread/qthread.cpp:531
#6 0x00007fb97ebb9015 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#7 0x00007fb97d8dcbc2 in QThreadPrivate::start (arg=0x7fb97ee30d80) at thread/qthread_unix.cpp:361
#8 0x00007fb97cc9f6db in start_thread (arg=0x7fb96c973700) at pthread_create.c:463
#9 0x00007fb97d1dc88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fb96eb46700 (LWP 17881)):
#0 0x00007fb97d1cfbf9 in __GI___poll (fds=0x7fb96eb45c78, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1 0x00007fb9827eb747 in ?? () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#2 0x00007fb9827ed36a in xcb_wait_for_event () from /usr/lib/x86_64-linux-gnu/libxcb.so.1
#3 0x00007fb970ccad4a in QXcbEventQueue::run (this=0x559cf43556f0) at qxcbeventqueue.cpp:225
#4 0x00007fb97d8dcbc2 in QThreadPrivate::start (arg=0x559cf43556f0) at thread/qthread_unix.cpp:361
#5 0x00007fb97cc9f6db in start_thread (arg=0x7fb96eb46700) at pthread_create.c:463
#6 0x00007fb97d1dc88f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fb983f94840 (LWP 17861)):
[KCrash Handler]
#6 0x0000559cf3e556d0 in ?? ()
#7 0x00007fb97dae4f3f in QtPrivate::QSlotObjectBase::call (a=0x7ffd8e020080, r=0x559cf4423050, this=0x559cf466c7d0) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:394
#8 QMetaObject::activate (sender=0x559cf4659e80, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x7ffd8e020080) at kernel/qobject.cpp:3759
#9 0x00007fb97dae54f7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7fb9825cbf20 <Plasma::Containment::staticMetaObject>, local_signal_index=local_signal_index@entry=4, argv=argv@entry=0x7ffd8e020080) at kernel/qobject.cpp:3631
#10 0x00007fb982348725 in Plasma::Containment::showAddWidgetsInterface (this=<optimized out>, _t1=...) at ./obj-x86_64-linux-gnu/src/plasma/KF5Plasma_autogen/include/moc_containment.cpp:445
#11 0x00007fb98235a890 in Plasma::ContainmentPrivate::triggerShowAddWidgets (this=<optimized out>) at ./src/plasma/private/containment_p.cpp:133
#12 0x00007fb98234acc1 in Plasma::Containment::qt_static_metacall (_o=<optimized out>, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>) at ./obj-x86_64-linux-gnu/src/plasma/KF5Plasma_autogen/include/moc_containment.cpp:189
#13 0x00007fb97dae4e25 in QMetaObject::activate (sender=sender@entry=0x559cf448d920, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffd8e020230) at kernel/qobject.cpp:3778
#14 0x00007fb97dae54f7 in QMetaObject::activate (sender=sender@entry=0x559cf448d920, m=m@entry=0x7fb97fae1820 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x7ffd8e020230) at kernel/qobject.cpp:3631
#15 0x00007fb97f4090f2 in QAction::triggered (this=this@entry=0x559cf448d920, _t1=<optimized out>) at .moc/moc_qaction.cpp:380
#16 0x00007fb97f40b70c in QAction::activate (this=0x559cf448d920, event=<optimized out>) at kernel/qaction.cpp:1166
#17 0x0000559cf3e49fcf in ?? ()
#18 0x0000559cf3e4a835 in ?? ()
#19 0x00007fb981678af9 in QQmlObjectOrGadget::metacall (this=this@entry=0x7ffd8e0206f0, type=type@entry=QMetaObject::InvokeMetaMethod, index=<optimized out>, index@entry=82, argv=argv@entry=0x7ffd8e020400) at qml/qqmlpropertycache.cpp:1735
#20 0x00007fb98157a62b in CallMethod (object=..., index=82, returnType=returnType@entry=43, argCount=argCount@entry=0, argTypes=argTypes@entry=0x0, engine=engine@entry=0x559cf7c78580, callArgs=0x7fb929da2800, callType=QMetaObject::InvokeMetaMethod) at jsruntime/qv4qobjectwrapper.cpp:1231
#21 0x00007fb98157c522 in CallPrecise (object=..., data=..., engine=engine@entry=0x559cf7c78580, callArgs=callArgs@entry=0x7fb929da2800, callType=callType@entry=QMetaObject::InvokeMetaMethod) at jsruntime/qv4qobjectwrapper.cpp:1479
#22 0x00007fb98157d1ff in QV4::QObjectMethod::callInternal (this=<optimized out>, thisObject=0x7fb929da27a0, argv=<optimized out>, argc=<optimized out>) at jsruntime/qv4qobjectwrapper.cpp:2017
#23 0x00007fb9816033b9 in QV4::FunctionObject::call (argc=0, argv=0x7fb929da2758, thisObject=0x7fb929da27a0, this=<optimized out>) at jsruntime/qv4functionobject_p.h:202
#24 QV4::Runtime::method_callProperty (engine=0x559cf7c78580, base=<optimized out>, nameIndex=<optimized out>, argv=0x7fb929da2758, argc=<optimized out>) at jsruntime/qv4runtime.cpp:1385
#25 0x00007fb9815974e0 in QV4::Moth::VME::interpret (frame=0x7ffd8e020a60, engine=0x559cf7c78580, code=0x7fb928996e1a "\016\002") at jsruntime/qv4vme_moth.cpp:718
#26 0x00007fb98159a746 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffd8e020a60, engine=engine@entry=0x559cf7c78580) at jsruntime/qv4vme_moth.cpp:441
#27 0x00007fb98152d91b in QV4::Function::call (this=this@entry=0x559cf7cde1b0, thisObject=thisObject@entry=0x7fb929da2740, argv=argv@entry=0x7fb929da2758, argc=<optimized out>, context=<optimized out>) at jsruntime/qv4function.cpp:68
#28 0x00007fb9816a1737 in QQmlJavaScriptExpression::evaluate (this=this@entry=0x559cf7d69590, callData=callData@entry=0x7fb929da2728, isUndefined=isUndefined@entry=0x0) at qml/qqmljavascriptexpression.cpp:216
#29 0x00007fb981641289 in QQmlBoundSignalExpression::evaluate (this=this@entry=0x559cf7d69590, a=a@entry=0x7ffd8e022bb0) at qml/qqmlboundsignal.cpp:225
#30 0x00007fb98164260b in QQmlBoundSignal_callback (e=0x559cf7ce7b80, a=0x7ffd8e022bb0) at qml/qqmlboundsignal.cpp:358
#31 0x00007fb981682cc3 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x7ffd8e022bb0) at qml/qqmlnotifier.cpp:106
#32 0x00007fb981623329 in QQmlData::signalEmitted (object=0x559cf994aff0, index=<optimized out>, a=0x7ffd8e022bb0) at qml/qqmlengine.cpp:880
#33 0x00007fb97dae465f in QMetaObject::activate (sender=0x559cf994aff0, signalOffset=<optimized out>, local_signal_index=<optimized out>, argv=argv@entry=0x7ffd8e022bb0) at kernel/qobject.cpp:3647
#34 0x00007fb98161d6c5 in QQmlVMEMetaObject::activate (this=this@entry=0x559cf7d04770, object=<optimized out>, index=index@entry=69, args=args@entry=0x7ffd8e022bb0) at qml/qqmlvmemetaobject.cpp:1246
#35 0x00007fb98161f918 in QQmlVMEMetaObject::metaCall (this=0x559cf7d04770, o=<optimized out>, c=QMetaObject::InvokeMetaMethod, _id=69, a=0x7ffd8e022bb0) at qml/qqmlvmemetaobject.cpp:922
#36 0x00007fb98161e9f9 in QQmlVMEMetaObject::metaCall (this=0x559cf9916ba0, o=<optimized out>, c=QMetaObject::InvokeMetaMethod, _id=69, a=0x7ffd8e022bb0) at qml/qqmlvmemetaobject.cpp:979
#37 0x00007fb98161e9f9 in QQmlVMEMetaObject::metaCall (this=0x559cf7ce79a0, o=<optimized out>, c=QMetaObject::InvokeMetaMethod, _id=69, a=0x7ffd8e022bb0) at qml/qqmlvmemetaobject.cpp:979
#38 0x00007fb981678af9 in QQmlObjectOrGadget::metacall (this=this@entry=0x7ffd8e022ea0, type=type@entry=QMetaObject::InvokeMetaMethod, index=<optimized out>, index@entry=69, argv=argv@entry=0x7ffd8e022bb0) at qml/qqmlpropertycache.cpp:1735
#39 0x00007fb98157a62b in CallMethod (object=..., index=69, returnType=returnType@entry=43, argCount=argCount@entry=0, argTypes=argTypes@entry=0x0, engine=engine@entry=0x559cf7c78580, callArgs=0x7fb929da26f0, callType=QMetaObject::InvokeMetaMethod) at jsruntime/qv4qobjectwrapper.cpp:1231
#40 0x00007fb98157c522 in CallPrecise (object=..., data=..., engine=engine@entry=0x559cf7c78580, callArgs=callArgs@entry=0x7fb929da26f0, callType=callType@entry=QMetaObject::InvokeMetaMethod) at jsruntime/qv4qobjectwrapper.cpp:1479
#41 0x00007fb98157d1ff in QV4::QObjectMethod::callInternal (this=<optimized out>, thisObject=0x7fb929da2690, argv=<optimized out>, argc=<optimized out>) at jsruntime/qv4qobjectwrapper.cpp:2017
#42 0x00007fb9816033b9 in QV4::FunctionObject::call (argc=0, argv=0x7fb929da2648, thisObject=0x7fb929da2690, this=<optimized out>) at jsruntime/qv4functionobject_p.h:202
#43 QV4::Runtime::method_callProperty (engine=0x559cf7c78580, base=<optimized out>, nameIndex=<optimized out>, argv=0x7fb929da2648, argc=<optimized out>) at jsruntime/qv4runtime.cpp:1385
#44 0x00007fb9815974e0 in QV4::Moth::VME::interpret (frame=0x7ffd8e023210, engine=0x559cf7c78580, code=0x7fb9289708da "\030\006\330\026\006\002`") at jsruntime/qv4vme_moth.cpp:718
#45 0x00007fb98159a746 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffd8e023210, engine=engine@entry=0x559cf7c78580) at jsruntime/qv4vme_moth.cpp:441
#46 0x00007fb98152d91b in QV4::Function::call (this=this@entry=0x559cf7ca9b50, thisObject=thisObject@entry=0x7fb929da2628, argv=argv@entry=0x7fb929da2640, argc=<optimized out>, context=<optimized out>) at jsruntime/qv4function.cpp:68
#47 0x00007fb9816a1737 in QQmlJavaScriptExpression::evaluate (this=this@entry=0x559cf7d59d00, callData=callData@entry=0x7fb929da2610, isUndefined=isUndefined@entry=0x0) at qml/qqmljavascriptexpression.cpp:216
#48 0x00007fb981641289 in QQmlBoundSignalExpression::evaluate (this=this@entry=0x559cf7d59d00, a=a@entry=0x7ffd8e024fa0) at qml/qqmlboundsignal.cpp:225
#49 0x00007fb98164260b in QQmlBoundSignal_callback (e=0x559cf9950490, a=0x7ffd8e024fa0) at qml/qqmlboundsignal.cpp:358
#50 0x00007fb981682cc3 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x7ffd8e024fa0) at qml/qqmlnotifier.cpp:106
#51 0x00007fb981623329 in QQmlData::signalEmitted (object=0x559cf99d3b30, index=<optimized out>, a=0x7ffd8e024fa0) at qml/qqmlengine.cpp:880
#52 0x00007fb97dae465f in QMetaObject::activate (sender=0x559cf99d3b30, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd8e024fa0) at kernel/qobject.cpp:3647
#53 0x00007fb97dae54f7 in QMetaObject::activate (sender=<optimized out>, m=m@entry=0x7fb9584440c0 <QQuickAction1::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffd8e024fa0) at kernel/qobject.cpp:3631
#54 0x00007fb95821f3ef in QQuickAction1::triggered (this=<optimized out>, _t1=<optimized out>) at .moc/moc_qquickaction_p.cpp:366
#55 0x00007fb9581fbd53 in QQuickAction1::trigger (this=<optimized out>, source=<optimized out>) at qquickaction.cpp:462
#56 0x00007fb9581fc94b in QQuickAction1::trigger (this=<optimized out>, source=<optimized out>) at qquickaction.cpp:456
#57 0x00007fb95821f9dc in QQuickAction1::qt_static_metacall (_o=_o@entry=0x559cf99d3b30, _c=_c@entry=QMetaObject::InvokeMetaMethod, _id=_id@entry=12, _a=_a@entry=0x7ffd8e025150) at .moc/moc_qquickaction_p.cpp:169
#58 0x00007fb95821fe45 in QQuickAction1::qt_metacall (this=0x559cf99d3b30, _c=QMetaObject::InvokeMetaMethod, _id=12, _a=0x7ffd8e025150) at .moc/moc_qquickaction_p.cpp:330
#59 0x00007fb981678af9 in QQmlObjectOrGadget::metacall (this=this@entry=0x7ffd8e025490, type=type@entry=QMetaObject::InvokeMetaMethod, index=<optimized out>, index@entry=17, argv=<optimized out>) at qml/qqmlpropertycache.cpp:1735
#60 0x00007fb98157abf5 in CallMethod (object=..., index=<optimized out>, returnType=returnType@entry=43, argCount=<optimized out>, argTypes=<optimized out>, engine=engine@entry=0x559cf7c78580, callArgs=<optimized out>, callType=<optimized out>) at jsruntime/qv4qobjectwrapper.cpp:1213
#61 0x00007fb98157c55f in CallPrecise (object=..., data=..., engine=engine@entry=0x559cf7c78580, callArgs=callArgs@entry=0x7fb929da25c0, callType=callType@entry=QMetaObject::InvokeMetaMethod) at jsruntime/qv4qobjectwrapper.cpp:1475
#62 0x00007fb98157d5ec in CallOverloaded (callType=QMetaObject::InvokeMetaMethod, propertyCache=0x7fb95c150a70, callArgs=0x7fb929da25c0, engine=0x559cf7c78580, data=..., object=...) at jsruntime/qv4qobjectwrapper.cpp:1549
#63 QV4::QObjectMethod::callInternal (this=<optimized out>, thisObject=<optimized out>, argv=<optimized out>, argc=<optimized out>) at jsruntime/qv4qobjectwrapper.cpp:2019
#64 0x00007fb9816033b9 in QV4::FunctionObject::call (argc=1, argv=0x7fb929da2570, thisObject=0x7fb929da2558, this=<optimized out>) at jsruntime/qv4functionobject_p.h:202
#65 QV4::Runtime::method_callProperty (engine=0x559cf7c78580, base=<optimized out>, nameIndex=<optimized out>, argv=0x7fb929da2570, argc=<optimized out>) at jsruntime/qv4runtime.cpp:1385
#66 0x00007fb9815974e0 in QV4::Moth::VME::interpret (frame=0x7ffd8e025800, engine=0x559cf7c78580, code=0x7fb928970c16 "\030\006\330\026\006\002") at jsruntime/qv4vme_moth.cpp:718
#67 0x00007fb98159a746 in QV4::Moth::VME::exec (frame=frame@entry=0x7ffd8e025800, engine=engine@entry=0x559cf7c78580) at jsruntime/qv4vme_moth.cpp:441
#68 0x00007fb98152d91b in QV4::Function::call (this=this@entry=0x559cf7ca9d80, thisObject=thisObject@entry=0x7fb929da24f0, argv=argv@entry=0x7fb929da2508, argc=<optimized out>, context=<optimized out>) at jsruntime/qv4function.cpp:68
#69 0x00007fb9816a1737 in QQmlJavaScriptExpression::evaluate (this=this@entry=0x559cf7d0e1a0, callData=callData@entry=0x7fb929da24d8, isUndefined=isUndefined@entry=0x0) at qml/qqmljavascriptexpression.cpp:216
#70 0x00007fb981641289 in QQmlBoundSignalExpression::evaluate (this=this@entry=0x559cf7d0e1a0, a=a@entry=0x7ffd8e027590) at qml/qqmlboundsignal.cpp:225
#71 0x00007fb98164260b in QQmlBoundSignal_callback (e=0x559cf7d0e150, a=0x7ffd8e027590) at qml/qqmlboundsignal.cpp:358
#72 0x00007fb981682cc3 in QQmlNotifier::emitNotify (endpoint=<optimized out>, a=a@entry=0x7ffd8e027590) at qml/qqmlnotifier.cpp:106
#73 0x00007fb981623329 in QQmlData::signalEmitted (object=0x559cf68f5a90, index=<optimized out>, a=0x7ffd8e027590) at qml/qqmlengine.cpp:880
#74 0x00007fb97dae465f in QMetaObject::activate (sender=sender@entry=0x559cf68f5a90, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=15, argv=argv@entry=0x7ffd8e027590) at kernel/qobject.cpp:3647
#75 0x00007fb97dae54f7 in QMetaObject::activate (sender=sender@entry=0x559cf68f5a90, m=m@entry=0x7fb9820ede60 <QQuickMouseArea::staticMetaObject>, local_signal_index=local_signal_index@entry=15, argv=argv@entry=0x7ffd8e027590) at kernel/qobject.cpp:3631
#76 0x00007fb981cf4832 in QQuickMouseArea::released (this=this@entry=0x559cf68f5a90, _t1=<optimized out>, _t1@entry=0x559cf68f5d18) at .moc/moc_qquickmousearea_p.cpp:659
#77 0x00007fb981cf604c in QQuickMouseArea::setPressed (this=this@entry=0x559cf68f5a90, button=<optimized out>, p=p@entry=false, source=<optimized out>) at items/qquickmousearea.cpp:1234
#78 0x00007fb981cf71e8 in QQuickMouseArea::mouseReleaseEvent (this=0x559cf68f5a90, event=0x7ffd8e027ec0) at items/qquickmousearea.cpp:806
#79 0x00007fb981c5fc78 in QQuickItem::event (this=0x559cf68f5a90, ev=0x7ffd8e027ec0) at items/qquickitem.cpp:8096
#80 0x00007fb97f40f83c in QApplicationPrivate::notify_helper (this=this@entry=0x559cf43387d0, receiver=receiver@entry=0x559cf68f5a90, e=e@entry=0x7ffd8e027ec0) at kernel/qapplication.cpp:3752
#81 0x00007fb97f416dd0 in QApplication::notify (this=0x7ffd8e028380, receiver=0x559cf68f5a90, e=0x7ffd8e027ec0) at kernel/qapplication.cpp:3499
#82 0x00007fb97dab5328 in QCoreApplication::notifyInternal2 (receiver=0x559cf68f5a90, event=0x7ffd8e027ec0) at kernel/qcoreapplication.cpp:1061
#83 0x00007fb97dab54fe in QCoreApplication::sendEvent (receiver=receiver@entry=0x559cf68f5a90, event=event@entry=0x7ffd8e027ec0) at kernel/qcoreapplication.cpp:1451
#84 0x00007fb981c790ed in QQuickWindowPrivate::deliverMouseEvent (this=this@entry=0x559cf8730a70, pointerEvent=0x559cf7d3a310) at items/qquickwindow.cpp:1784
#85 0x00007fb981c7a2db in QQuickWindowPrivate::deliverPointerEvent (this=this@entry=0x559cf8730a70, event=0x559cf7d3a310) at items/qquickwindow.cpp:2346
#86 0x00007fb981c7af6e in QQuickWindowPrivate::handleMouseEvent (this=0x559cf8730a70, event=0x7ffd8e027ec0) at items/qquickwindow.cpp:2210
#87 0x00007fb97e088ac5 in QWindow::event (this=this@entry=0x559cf86c2760, ev=ev@entry=0x7ffd8e027ec0) at kernel/qwindow.cpp:2336
#88 0x00007fb981c7c285 in QQuickWindow::event (this=0x559cf86c2760, e=0x7ffd8e027ec0) at items/qquickwindow.cpp:1673
#89 0x00007fb97f40f83c in QApplicationPrivate::notify_helper (this=this@entry=0x559cf43387d0, receiver=receiver@entry=0x559cf86c2760, e=e@entry=0x7ffd8e027ec0) at kernel/qapplication.cpp:3752
#90 0x00007fb97f416dd0 in QApplication::notify (this=0x7ffd8e028380, receiver=0x559cf86c2760, e=0x7ffd8e027ec0) at kernel/qapplication.cpp:3499
#91 0x00007fb97dab5328 in QCoreApplication::notifyInternal2 (receiver=0x559cf86c2760, event=0x7ffd8e027ec0) at kernel/qcoreapplication.cpp:1061
#92 0x00007fb97dab550e in QCoreApplication::sendSpontaneousEvent (receiver=receiver@entry=0x559cf86c2760, event=event@entry=0x7ffd8e027ec0) at kernel/qcoreapplication.cpp:1463
#93 0x00007fb97e07d52b in QGuiApplicationPrivate::processMouseEvent (e=0x559cf6e218d0) at kernel/qguiapplication.cpp:2102
#94 0x00007fb97e07e695 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x559cf6e218d0) at kernel/qguiapplication.cpp:1837
#95 0x00007fb97e05714b in QWindowSystemInterface::sendWindowSystemEvents (flags=flags@entry=...) at kernel/qwindowsysteminterface.cpp:1068
#96 0x00007fb970ccbd2a in xcbSourceDispatch (source=<optimized out>) at qxcbeventdispatcher.cpp:105
#97 0x00007fb977037387 in g_main_context_dispatch () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#98 0x00007fb9770375c0 in ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#99 0x00007fb97703764c in g_main_context_iteration () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#100 0x00007fb97db1213f in QEventDispatcherGlib::processEvents (this=0x559cf43e4ac0, flags=...) at kernel/qeventdispatcher_glib.cpp:422
#101 0x00007fb97dab364a in QEventLoop::exec (this=this@entry=0x7ffd8e028260, flags=..., flags@entry=...) at kernel/qeventloop.cpp:225
#102 0x00007fb97dabc800 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1364
#103 0x0000559cf3e35f95 in ?? ()
#104 0x00007fb97d0dcb97 in __libc_start_main (main=0x559cf3e35450, argc=1, argv=0x7ffd8e028538, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd8e028528) at ../csu/libc-start.c:310
#105 0x0000559cf3e3641a in _start ()

I had to re-install kubuntu-desktop to get it to work

Code: Select all

sudo apt install --reinstall kubuntu-desktop

Regarding "Signal 11":

Helpful Info:

https://www.freebsd.org/doc/en/books/fa ... dp45792888

Especially, the listing of possible hardware problems.

Short summary:
If repeatable -> software-error
If random -> hardware-error

hneyman wrote:I had to re-install kubuntu-desktop to get it to work

Code: Select all

sudo apt install --reinstall kubuntu-desktop

Tanks man, this solution works for me

For me the above-mentioned solutions did not work on Kubuntu 22.04.1, but instead I had to reinstall the dependencies of kubuntu-desktop with:

Code: Select all

apt-cache depends kubuntu-desktop | grep '[ |]Depends: [^<]' | cut -d: -f2 | tr -d ' ' | xargs sudo apt-get --reinstall install -y


This way of reinstalling a package and its dependencies is from Ask Ubuntu:
https://askubuntu.com/a/275733/
Thank you for pointing me in the right direction!

My symptoms were missing icons from the taskbar, black desktop wallpaper, inability to right-click on the desktop and inability to switch activities with Windows/super key + tab.

AgenttiX wrote:For me the above-mentioned solutions did not work on Kubuntu 22.04.1, but instead I had to reinstall the dependencies of kubuntu-desktop with:

Code: Select all

apt-cache depends kubuntu-desktop | grep '[ |]Depends: [^<]' | cut -d: -f2 | tr -d ' ' | xargs sudo apt-get --reinstall install -y


This way of reinstalling a package and its dependencies is from Ask Ubuntu:
https://askubuntu.com/a/275733/
Thank you for pointing me in the right direction!

My symptoms were missing icons from the taskbar, black desktop wallpaper, inability to right-click on the desktop and inability to switch activities with Windows/super key + tab.

Thank you for sharing. This worked for me as well on Kubuntu Jammy 22.04.1 LTS. My problem was that I uninstalled some packages by accident and had a black wallpaper and the task manager plasmoid was missing.