it seems there is an unchecked x11 call in kidletime. I'm going to test a patch after I let it compile overnight...

Reproducible: Always




I get this stack trace from plasmashell. I hope it's not too huge

#0  0xb3fd654a in XGetXCBConnection () from /usr/lib/i386-linux-gnu/libX11-xcb.so.1
#1  0x9370e076 in XSyncBasedPoller::XSyncBasedPoller(QObject*) () from /opt/lib/i386-linux-gnu/libKF5IdleTime.so.5
#2  0x9370e61c in XSyncBasedPoller::instance() () from /opt/lib/i386-linux-gnu/libKF5IdleTime.so.5
#3  0x9370951d in KIdleTimePrivate::loadSystem() () from /opt/lib/i386-linux-gnu/libKF5IdleTime.so.5
#4  0x937097a7 in KIdleTime::KIdleTime() () from /opt/lib/i386-linux-gnu/libKF5IdleTime.so.5
#5  0x9370997f in KIdleTime::instance() () from /opt/lib/i386-linux-gnu/libKF5IdleTime.so.5
#6  0x937262d3 in PowermanagementEngine::sourceRequestEvent(QString const&) ()
   from /opt/lib/i386-linux-gnu/plugins/plasma/dataengine/plasma_engine_powermanagement.so
#7  0xb7952b1a in Plasma::DataEngine::connectSource(QString const&, QObject*, unsigned int, Plasma::Types::IntervalAlignment) const ()
   from /opt/lib/i386-linux-gnu/libKF5Plasma.so.5
#8  0xacac78ef in Plasma::DataSource::setConnectedSources(QStringList const&) ()
   from /opt/lib/i386-linux-gnu/qml/org/kde/plasma/core/libcorebindingsplugin.so
#9  0xacadde04 in Plasma::DataSource::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) ()
   from /opt/lib/i386-linux-gnu/qml/org/kde/plasma/core/libcorebindingsplugin.so
#10 0xacae0c3d in Plasma::DataSource::qt_metacall(QMetaObject::Call, int, void**) ()
   from /opt/lib/i386-linux-gnu/qml/org/kde/plasma/core/libcorebindingsplugin.so
#11 0xb6d1ef58 in QQmlVMEMetaObject::metaCall (this=0x9817658, c=QMetaObject::WriteProperty, _id=6, a=0xbfffc378)
    at qml/qqmlvmemetaobject.cpp:971
#12 0xb6aed7b4 in QAbstractDynamicMetaObject::metaCall (this=0x9817658, c=QMetaObject::WriteProperty, _id=6, a=0xbfffc378)
    at /opt/include/QtCore/5.5.0/QtCore/private/qobject_p.h:421
#13 0xb561f990 in QMetaObject::metacall (object=0x98170e0, cl=QMetaObject::WriteProperty, idx=6, argv=0xbfffc378)
    at /srcbuild/qtbase/src/corelib/kernel/qmetaobject.cpp:294
#14 0xb6d3e6c9 in QQmlPropertyPrivate::write (object=0x98170e0, property=..., value=..., context=0x9815ab8, flags=...)
    at qml/qqmlproperty.cpp:1309
#15 0xb6d3e090 in QQmlPropertyPrivate::writeValueProperty (object=0x98170e0, core=..., value=..., context=0x9815ab8, flags=...)
    at qml/qqmlproperty.cpp:1238
#16 0xb6d400fc in QQmlPropertyPrivate::writeBinding (object=0x98170e0, core=..., context=0x9815ab8, expression=0x98179c0, result=..., 
    isUndefined=false, flags=...) at qml/qqmlproperty.cpp:1571
#17 0xb6dc7040 in QQmlBinding::update (this=0x98179b0, flags=...) at qml/qqmlbinding.cpp:224
#18 0xb6dc77c6 in QQmlBinding::setEnabled (this=0x98179b0, e=true, flags=...) at qml/qqmlbinding.cpp:329
#19 0xb6dc76f6 in QQmlBinding::setEnabled (This=0x98179cc, e=true, f=...) at qml/qqmlbinding.cpp:310
#20 0xb6d29249 in QQmlAbstractBinding::setEnabled (this=0x98179cc, e=true, f=...)
    at ../../include/QtQml/5.5.0/QtQml/private/../../../../../src/qml/qml/qqmlabstractbinding_p.h:110
#21 0xb6dd82f0 in QQmlObjectCreator::finalize (this=0x980e978, interrupt=...) at qml/qqmlobjectcreator.cpp:1216
#22 0xb6d48ade in QQmlIncubatorPrivate::incubate (this=0x980e8b0, i=...) at qml/qqmlincubator.cpp:348
#23 0xb6d48dcb in QQmlIncubationController::incubateFor (this=0x96fe820, msecs=10) at qml/qqmlincubator.cpp:395
#24 0xb74f9b67 in KDeclarative::QmlObjectIncubationController::incubatingObjectCountChanged(int) ()
   from /opt/lib/i386-linux-gnu/libKF5Declarative.so.5
#25 0xb6d48351 in QQmlIncubatorPrivate::clear (this=0x9818108) at qml/qqmlincubator.cpp:149
#26 0xb6d48b7a in QQmlIncubatorPrivate::incubate (this=0x9818108, i=...) at qml/qqmlincubator.cpp:360
#27 0xb6d48c01 in QQmlIncubatorPrivate::incubate (this=0x9843a20, i=...) at qml/qqmlincubator.cpp:366
#28 0xb6d48dcb in QQmlIncubationController::incubateFor (this=0x96fe820, msecs=10) at qml/qqmlincubator.cpp:395
#29 0xb74f9b67 in KDeclarative::QmlObjectIncubationController::incubatingObjectCountChanged(int) ()
   from /opt/lib/i386-linux-gnu/libKF5Declarative.so.5
#30 0xb6d4802e in QQmlEnginePrivate::incubate (this=0x9677958, i=..., forContext=0x98439b0) at qml/qqmlincubator.cpp:97
#31 0xb6d44618 in QQmlComponent::create (this=0x9841600, incubator=..., context=0x9843948, forContext=0x0) at qml/qqmlcomponent.cpp:1068
#32 0xb7d7e912 in QQuickLoaderPrivate::_q_sourceLoaded (this=0x9842fa0) at items/qquickloader.cpp:713
#33 0xb7d7dfe0 in QQuickLoaderPrivate::load (this=0x9842fa0) at items/qquickloader.cpp:596
#34 0xb7d7eb4f in QQuickLoader::componentComplete (this=0x9840d30) at items/qquickloader.cpp:805
#35 0xb6dd841b in QQmlObjectCreator::finalize (this=0x9819e58, interrupt=...) at qml/qqmlobjectcreator.cpp:1231
#36 0xb6d48ade in QQmlIncubatorPrivate::incubate (this=0x9846850, i=...) at qml/qqmlincubator.cpp:348
#37 0xb6d48dcb in QQmlIncubationController::incubateFor (this=0x96fe820, msecs=10) at qml/qqmlincubator.cpp:395
#38 0xb74f9b67 in KDeclarative::QmlObjectIncubationController::incubatingObjectCountChanged(int) ()
   from /opt/lib/i386-linux-gnu/libKF5Declarative.so.5
#39 0xb6d4802e in QQmlEnginePrivate::incubate (this=0x9677958, i=..., forContext=0x9819de8) at qml/qqmlincubator.cpp:97
#40 0xb6d44618 in QQmlComponent::create (this=0x9849150, incubator=..., context=0x9842088, forContext=0x0) at qml/qqmlcomponent.cpp:1068
#41 0xb7d7e912 in QQuickLoaderPrivate::_q_sourceLoaded (this=0x9835b98) at items/qquickloader.cpp:713
#42 0xb7d7dfe0 in QQuickLoaderPrivate::load (this=0x9835b98) at items/qquickloader.cpp:596
#43 0xb7d7dd6e in QQuickLoader::loadFromSourceComponent (this=0x96cd5e0) at items/qquickloader.cpp:496
#44 0xb7d7dcb5 in QQuickLoader::setSourceComponent (this=0x96cd5e0, comp=0x9849150) at items/qquickloader.cpp:474
#45 0xb7d7f611 in QQuickLoader::qt_static_metacall (_o=0x96cd5e0, _c=QMetaObject::WriteProperty, _id=2, _a=0xbfffd058)
    at .moc/moc_qquickloader_p.cpp:248
#46 0xb7d7f7c1 in QQuickLoader::qt_metacall (this=0x96cd5e0, _c=QMetaObject::WriteProperty, _id=2, _a=0xbfffd058)
    at .moc/moc_qquickloader_p.cpp:298
#47 0xb561f9ad in QMetaObject::metacall (object=0x96cd5e0, cl=QMetaObject::WriteProperty, idx=45, argv=0xbfffd058)
    at /srcbuild/qtbase/src/corelib/kernel/qmetaobject.cpp:296
#48 0xb6d3e859 in QQmlPropertyPrivate::write (object=0x96cd5e0, property=..., value=..., context=0x9818cc8, flags=...)
    at qml/qqmlproperty.cpp:1330
#49 0xb6d3e090 in QQmlPropertyPrivate::writeValueProperty (object=0x96cd5e0, core=..., value=..., context=0x9818cc8, flags=...)
    at qml/qqmlproperty.cpp:1238
#50 0xb6d400fc in QQmlPropertyPrivate::writeBinding (object=0x96cd5e0, core=..., context=0x9818cc8, expression=0x98186c0, result=..., 
    isUndefined=false, flags=...) at qml/qqmlproperty.cpp:1571
#51 0xb6dc7040 in QQmlBinding::update (this=0x98186b0, flags=...) at qml/qqmlbinding.cpp:224
#52 0xb6dc7b24 in QQmlBinding::update (this=0x98186b0) at qml/qqmlbinding_p.h:97
#53 0xb6dc75f3 in QQmlBinding::expressionChanged (e=0x98186c0) at qml/qqmlbinding.cpp:285
#54 0xb6dbf392 in QQmlJavaScriptExpressionGuard_callback (e=0x9803b1c) at qml/qqmljavascriptexpression.cpp:360
#55 0xb6d9dc2e in QQmlNotifier::emitNotify (endpoint=0x9803b1c, a=0x0) at qml/qqmlnotifier.cpp:73
#56 0xb6d2443c in QQmlData::signalEmitted (object=0x98360b0, index=30, a=0x0) at qml/qqmlengine.cpp:714
#57 0xb56545fa in QMetaObject::activate (sender=0x98360b0, signalOffset=29, local_signal_index=1, argv=0x0)
    at /srcbuild/qtbase/src/corelib/kernel/qobject.cpp:3604
#58 0xb6d20832 in QQmlVMEMetaObject::activate (this=0x98198c8, object=0x98360b0, index=44, args=0x0) at qml/qqmlvmemetaobject.cpp:1324
#59 0xb6d1e523 in QQmlVMEMetaObject::metaCall (this=0x98198c8, c=QMetaObject::WriteProperty, _id=42, a=0xbfffd878)
    at qml/qqmlvmemetaobject.cpp:841
#60 0xb6aed7b4 in QAbstractDynamicMetaObject::metaCall (this=0x98198c8, c=QMetaObject::WriteProperty, _id=42, a=0xbfffd878)
    at /opt/include/QtCore/5.5.0/QtCore/private/qobject_p.h:421
#61 0xb6d1ef29 in QQmlVMEMetaObject::metaCall (this=0x9835850, c=QMetaObject::WriteProperty, _id=42, a=0xbfffd878)
    at qml/qqmlvmemetaobject.cpp:969
#62 0xb6aed7b4 in QAbstractDynamicMetaObject::metaCall (this=0x9835850, c=QMetaObject::WriteProperty, _id=42, a=0xbfffd878)
    at /opt/include/QtCore/5.5.0/QtCore/private/qobject_p.h:421
#63 0xb561f990 in QMetaObject::metacall (object=0x98360b0, cl=QMetaObject::WriteProperty, idx=42, argv=0xbfffd878)
    at /srcbuild/qtbase/src/corelib/kernel/qmetaobject.cpp:294
#64 0xb6d3e6c9 in QQmlPropertyPrivate::write (object=0x98360b0, property=..., value=..., context=0x9818cc8, flags=...)
    at qml/qqmlproperty.cpp:1309
#65 0xb6d3e090 in QQmlPropertyPrivate::writeValueProperty (object=0x98360b0, core=..., value=..., context=0x9818cc8, flags=...)
    at qml/qqmlproperty.cpp:1238
#66 0xb6d400fc in QQmlPropertyPrivate::writeBinding (object=0x98360b0, core=..., context=0x9818cc8, expression=0x9818bb0, result=..., 
    isUndefined=false, flags=...) at qml/qqmlproperty.cpp:1571
#67 0xb6dc7040 in QQmlBinding::update (this=0x9818ba0, flags=...) at qml/qqmlbinding.cpp:224
#68 0xb6dc7b24 in QQmlBinding::update (this=0x9818ba0) at qml/qqmlbinding_p.h:97
#69 0xb6dc75f3 in QQmlBinding::expressionChanged (e=0x9818bb0) at qml/qqmlbinding.cpp:285
#70 0xb6dbf392 in QQmlJavaScriptExpressionGuard_callback (e=0x9803b54) at qml/qqmljavascriptexpression.cpp:360
#71 0xb6d9dc2e in QQmlNotifier::emitNotify (endpoint=0x9803b54, a=0x0) at qml/qqmlnotifier.cpp:73
#72 0xb6d2443c in QQmlData::signalEmitted (object=0x9835b80, index=31, a=0x0) at qml/qqmlengine.cpp:714
#73 0xb56545fa in QMetaObject::activate (sender=0x9835b80, signalOffset=31, local_signal_index=0, argv=0x0)
    at /srcbuild/qtbase/src/corelib/kernel/qobject.cpp:3604
#74 0xb565442d in QMetaObject::activate (sender=0x9835b80, m=0xb7fca560 <QQuickLoader::staticMetaObject>, local_signal_index=0, argv=0x0)
    at /srcbuild/qtbase/src/corelib/kernel/qobject.cpp:3583
#75 0xb7d7f832 in QQuickLoader::itemChanged (this=0x9835b80) at .moc/moc_qquickloader_p.cpp:318
#76 0xb7d7e4a3 in QQuickLoaderPrivate::incubatorStateChanged (this=0x9846310, status=QQmlIncubator::Ready) at items/qquickloader.cpp:665
#77 0xb7d7e406 in QQuickLoaderIncubator::statusChanged (this=0x9819bb8, status=QQmlIncubator::Ready) at items/qquickloader.cpp:653
#78 0xb6d494bc in QQmlIncubatorPrivate::changeStatus (this=0x9819c48, s=QQmlIncubator::Ready) at qml/qqmlincubator.cpp:701
#79 0xb6d48bcd in QQmlIncubatorPrivate::incubate (this=0x9819c48, i=...) at qml/qqmlincubator.cpp:364
#80 0xb6d48dcb in QQmlIncubationController::incubateFor (this=0x96fe820, msecs=10) at qml/qqmlincubator.cpp:395
#81 0xb74f9b67 in KDeclarative::QmlObjectIncubationController::incubatingObjectCountChanged(int) ()
   from /opt/lib/i386-linux-gnu/libKF5Declarative.so.5
#82 0xb6d4802e in QQmlEnginePrivate::incubate (this=0x9677958, i=..., forContext=0x9819be8) at qml/qqmlincubator.cpp:97
#83 0xb6d44618 in QQmlComponent::create (this=0x9835e50, incubator=..., context=0x98468c0, forContext=0x0) at qml/qqmlcomponent.cpp:1068
#84 0xb7d7e912 in QQuickLoaderPrivate::_q_sourceLoaded (this=0x9846310) at items/qquickloader.cpp:713
#85 0xb7d7dfe0 in QQuickLoaderPrivate::load (this=0x9846310) at items/qquickloader.cpp:596
#86 0xb7d7eb4f in QQuickLoader::componentComplete (this=0x9835b80) at items/qquickloader.cpp:805
#87 0xb6dd841b in QQmlObjectCreator::finalize (this=0x9818178, interrupt=...) at qml/qqmlobjectcreator.cpp:1231
#88 0xb6d48ade in QQmlIncubatorPrivate::incubate (this=0x9818108, i=...) at qml/qqmlincubator.cpp:348
#89 0xb6d48dcb in QQmlIncubationController::incubateFor (this=0x96fe820, msecs=10) at qml/qqmlincubator.cpp:395
#90 0xb74f9b67 in KDeclarative::QmlObjectIncubationController::incubatingObjectCountChanged(int) ()
   from /opt/lib/i386-linux-gnu/libKF5Declarative.so.5
#91 0xb6d48351 in QQmlIncubatorPrivate::clear (this=0x96cc838) at qml/qqmlincubator.cpp:149
#92 0xb6d48b7a in QQmlIncubatorPrivate::incubate (this=0x96cc838, i=...) at qml/qqmlincubator.cpp:360
#93 0xb6d48dcb in QQmlIncubationController::incubateFor (this=0x96fe820, msecs=10) at qml/qqmlincubator.cpp:395
#94 0xb74f9b67 in KDeclarative::QmlObjectIncubationController::incubatingObjectCountChanged(int) ()
   from /opt/lib/i386-linux-gnu/libKF5Declarative.so.5
#95 0xb6d4802e in QQmlEnginePrivate::incubate (this=0x9677958, i=..., forContext=0x96cc7c8) at qml/qqmlincubator.cpp:97
#96 0xb6d44618 in QQmlComponent::create (this=0x9809ab0, incubator=..., context=0x9836318, forContext=0x0) at qml/qqmlcomponent.cpp:1068
#97 0xb7d7e912 in QQuickLoaderPrivate::_q_sourceLoaded (this=0x97fe648) at items/qquickloader.cpp:713
#98 0xb7d7dfe0 in QQuickLoaderPrivate::load (this=0x97fe648) at items/qquickloader.cpp:596
#99 0xb7d7eb4f in QQuickLoader::componentComplete (this=0x97fe3a0) at items/qquickloader.cpp:805
#100 0xb6dd841b in QQmlObjectCreator::finalize (this=0x97c5558, interrupt=...) at qml/qqmlobjectcreator.cpp:1231
#101 0xb6d48ade in QQmlIncubatorPrivate::incubate (this=0x9677710, i=...) at qml/qqmlincubator.cpp:348
#102 0xb6d4868e in QQmlIncubatorPrivate::forceCompletion (this=0x9677710, i=...) at qml/qqmlincubator.cpp:269
#103 0xb6d49317 in QQmlIncubator::forceCompletion (this=0x96776e4) at qml/qqmlincubator.cpp:600
#104 0xb74eb369 in KDeclarative::QmlObject::completeInitialization(QHash<QString, QVariant> const&) ()
   from /opt/lib/i386-linux-gnu/libKF5Declarative.so.5
#105 0xb78c1ddb in PlasmaQuick::AppletQuickItem::init() () from /opt/lib/i386-linux-gnu/libKF5PlasmaQuick.so.5
#106 0xaa2f47cf in AppletInterface::init() () from /opt/lib/i386-linux-gnu/plugins/plasma_appletscript_declarative.so
#107 0xaa2f30fd in AppletInterface::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) ()
   from /opt/lib/i386-linux-gnu/plugins/plasma_appletscript_declarative.so
#108 0xb564d1a6 in QMetaCallEvent::placeMetaCall (this=0x96fda78, object=0x9677120) at /srcbuild/qtbase/src/corelib/kernel/qobject.cpp:486
#109 0xb564e21e in QObject::event (this=0x9677120, e=0x96fda78) at /srcbuild/qtbase/src/corelib/kernel/qobject.cpp:1246
#110 0xb7c89849 in QQuickItem::event (this=0x9677120, ev=0x96fda78) at items/qquickitem.cpp:7320
#111 0xaa2f4b76 in AppletInterface::event(QEvent*) () from /opt/lib/i386-linux-gnu/plugins/plasma_appletscript_declarative.so
#112 0xb6134254 in QApplicationPrivate::notify_helper (this=0x8105d10, receiver=0x9677120, e=0x96fda78)
    at /srcbuild/qtbase/src/widgets/kernel/qapplication.cpp:3713
#113 0xb6131715 in QApplication::notify (this=0xbffff108, receiver=0x9677120, e=0x96fda78)
    at /srcbuild/qtbase/src/widgets/kernel/qapplication.cpp:3157
#114 0xb5616b29 in QCoreApplication::notifyInternal (this=0xbffff108, receiver=0x9677120, event=0x96fda78)
    at /srcbuild/qtbase/src/corelib/kernel/qcoreapplication.cpp:963
#115 0xb561abaa in QCoreApplication::sendEvent (receiver=0x9677120, event=0x96fda78)
    at ../../include/QtCore/../../../src/corelib/kernel/qcoreapplication.h:228
#116 0xb5617e4d in QCoreApplicationPrivate::sendPostedEvents (receiver=0x0, event_type=0, data=0x81011c0)
    at /srcbuild/qtbase/src/corelib/kernel/qcoreapplication.cpp:1580
#117 0xb56178d7 in QCoreApplication::sendPostedEvents (receiver=0x0, event_type=0)
    at /srcbuild/qtbase/src/corelib/kernel/qcoreapplication.cpp:1438
#118 0xb568ce94 in postEventSourceDispatch (s=0x8105c18) at /srcbuild/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:271
#119 0xb4452c84 in g_main_dispatch (context=<optimized out>) at gmain.c:3122
#120 g_main_context_dispatch (context=0x0) at gmain.c:3737
#121 0xb4452fa9 in g_main_context_iterate (context=0xb1903000, block=-1250695744, block@entry=1, dispatch=1, self=<optimized out>)
    at gmain.c:3808
#122 0xb4453076 in g_main_context_iteration (context=0xb1903000, may_block=1) at gmain.c:3869
#123 0xb568d5fc in QEventDispatcherGlib::processEvents (this=0x8125920, flags=...)
    at /srcbuild/qtbase/src/corelib/kernel/qeventdispatcher_glib.cpp:418
#124 0xb2473fab in QPAEventDispatcherGlib::processEvents (this=0x8125920, flags=...)
    at /srcbuild/qtbase/src/platformsupport/eventdispatchers/qeventdispatcher_glib.cpp:115
#125 0xb5613493 in QEventLoop::processEvents (this=0xbffff048, flags=...) at /srcbuild/qtbase/src/corelib/kernel/qeventloop.cpp:128
#126 0xb56137a6 in QEventLoop::exec (this=0xbffff048, flags=...) at /srcbuild/qtbase/src/corelib/kernel/qeventloop.cpp:204
#127 0xb56172ff in QCoreApplication::exec () at /srcbuild/qtbase/src/corelib/kernel/qcoreapplication.cpp:1216
#128 0xb5a456be in QGuiApplication::exec () at /srcbuild/qtbase/src/gui/kernel/qguiapplication.cpp:1528
#129 0xb6131071 in QApplication::exec () at /srcbuild/qtbase/src/widgets/kernel/qapplication.cpp:2973
#130 0x0806e5a0 in main ()