Bug 373045

Summary:	Plasma crashes switching to text console and back to X
Product:	[Plasma] plasmashell	Reporter:	Ugo Paternostro <ugo.kde>
Component:	Task Manager and Icons-Only Task Manager	Assignee:	Eike Hein <hein>
Status:	RESOLVED DUPLICATE
Severity:	crash	CC:	bhush94, notmart, plasma-bugs
Priority:	NOR	Keywords:	drkonqi
Version:	5.8.0
Target Milestone:	1.0
Platform:	unspecified
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Ugo Paternostro 2016-11-28 19:11:32 UTC

Application: plasmashell (5.8.1)

Qt Version: 5.7.0
Frameworks Version: 5.27.0
Operating System: Linux 4.8.8-300.fc25.x86_64 x86_64
Distribution (Platform): Fedora RPMs

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

I recently upgraded to Fedora 25 from 24. Since then, the plasma panel freezes during usage (i.e.: task manager is unresponsive, clock stops, notifications are not shown). Yes, I understand it may be caused by some settings I should wipe, but we are always in a hurry, don't we?

I discovered that switching to text console (Ctrl-Alt-F2) and then back to X (Alt-F1) unfreezes it, so I keep doing this exercise during the day.

This time it crashed.

-- Backtrace:
Application: Plasma (plasmashell), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f51b627d4c0 (LWP 1958))]

Thread 9 (Thread 0x7f50c5ffb700 (LWP 16122)):
#0  0x00007f51b7ccaa0e in srb_callback () at /usr/lib64/pulseaudio/libpulsecommon-9.0.so
#1  0x00007f51b7ccb28a in srbchannel_rwloop () at /usr/lib64/pulseaudio/libpulsecommon-9.0.so
#2  0x00007f51b85479cc in pa_mainloop_dispatch () at /lib64/libpulse.so.0
#3  0x00007f51b8547dcc in pa_mainloop_iterate () at /lib64/libpulse.so.0
#4  0x00007f51b8547e70 in pa_mainloop_run () at /lib64/libpulse.so.0
#5  0x00007f51b8555e99 in thread () at /lib64/libpulse.so.0
#6  0x00007f51b7cdb178 in internal_thread_func () at /usr/lib64/pulseaudio/libpulsecommon-9.0.so
#7  0x00007f51c36046ca in start_thread () at /lib64/libpthread.so.0
#8  0x00007f51c42b9f6f in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f50f94b0700 (LWP 2410)):
#0  0x00007f51c42ae00d in poll () at /lib64/libc.so.6
#1  0x00007f51bd04b156 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f51bd04b26c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f51c50b3d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f51c50650ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f51c4ec2643 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f50fac812c7 in KCupsConnection::run() () at /lib64/libkcupslib.so
#7  0x00007f51c4ec6a1a in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f51c36046ca in start_thread () at /lib64/libpthread.so.0
#9  0x00007f51c42b9f6f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f510c4d1700 (LWP 2232)):
#0  0x00007f51c42ae00d in poll () at /lib64/libc.so.6
#1  0x00007f51bd04b156 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#2  0x00007f51bd04b26c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#3  0x00007f51c50b3d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#4  0x00007f51c50650ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#5  0x00007f51c4ec2643 in QThread::exec() () at /lib64/libQt5Core.so.5
#6  0x00007f51c8abdca6 in QQuickPixmapReader::run() () at /lib64/libQt5Quick.so.5
#7  0x00007f51c4ec6a1a in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#8  0x00007f51c36046ca in start_thread () at /lib64/libpthread.so.0
#9  0x00007f51c42b9f6f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f5199697700 (LWP 2221)):
#0  0x00007f51c360a460 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f51ca956bd4 in QTWTF::TCMalloc_PageHeap::scavengerThread() () at /lib64/libQt5Script.so.5
#2  0x00007f51ca956c19 in  () at /lib64/libQt5Script.so.5
#3  0x00007f51c36046ca in start_thread () at /lib64/libpthread.so.0
#4  0x00007f51c42b9f6f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f519b3b6700 (LWP 2217)):
#0  0x00007f51c42a9bdd in read () at /lib64/libc.so.6
#1  0x00007f51bd08f450 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f51bd04ac60 in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f51bd04b0f4 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f51bd04b26c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f51c50b3d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f51c50650ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f51c4ec2643 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f51c8136735 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#9  0x00007f51c4ec6a1a in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f51c36046ca in start_thread () at /lib64/libpthread.so.0
#11 0x00007f51c42b9f6f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f51a8e2a700 (LWP 2066)):
#0  0x00007f51c4f5d5a9 in QElapsedTimer::isMonotonic() () at /lib64/libQt5Core.so.5
#1  0x00007f51c50b27ee in QTimerInfoList::repairTimersIfNeeded() () at /lib64/libQt5Core.so.5
#2  0x00007f51c50b2863 in QTimerInfoList::timerWait(timespec&) () at /lib64/libQt5Core.so.5
#3  0x00007f51c50b3a2c in timerSourcePrepareHelper(GTimerSource*, int*) () at /lib64/libQt5Core.so.5
#4  0x00007f51c50b3af5 in timerSourcePrepare(_GSource*, int*) () at /lib64/libQt5Core.so.5
#5  0x00007f51bd04a699 in g_main_context_prepare () at /lib64/libglib-2.0.so.0
#6  0x00007f51bd04b07b in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#7  0x00007f51bd04b26c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#8  0x00007f51c50b3d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#9  0x00007f51c50650ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#10 0x00007f51c4ec2643 in QThread::exec() () at /lib64/libQt5Core.so.5
#11 0x00007f51c8136735 in QQmlThreadPrivate::run() () at /lib64/libQt5Qml.so.5
#12 0x00007f51c4ec6a1a in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#13 0x00007f51c36046ca in start_thread () at /lib64/libpthread.so.0
#14 0x00007f51c42b9f6f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f51aa86f700 (LWP 2050)):
#0  0x00007f51c42a9bdd in read () at /lib64/libc.so.6
#1  0x00007f51bd08f450 in g_wakeup_acknowledge () at /lib64/libglib-2.0.so.0
#2  0x00007f51bd04ac60 in g_main_context_check () at /lib64/libglib-2.0.so.0
#3  0x00007f51bd04b0f4 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#4  0x00007f51bd04b26c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#5  0x00007f51c50b3d8b in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#6  0x00007f51c50650ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#7  0x00007f51c4ec2643 in QThread::exec() () at /lib64/libQt5Core.so.5
#8  0x00007f51c57697a9 in QDBusConnectionManager::run() () at /lib64/libQt5DBus.so.5
#9  0x00007f51c4ec6a1a in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#10 0x00007f51c36046ca in start_thread () at /lib64/libpthread.so.0
#11 0x00007f51c42b9f6f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f51abe5e700 (LWP 1976)):
#0  0x00007f51c42ae00d in poll () at /lib64/libc.so.6
#1  0x00007f51c927ad10 in _xcb_conn_wait () at /lib64/libxcb.so.1
#2  0x00007f51c927caa9 in xcb_wait_for_event () at /lib64/libxcb.so.1
#3  0x00007f51af6b0a19 in QXcbEventReader::run() () at /lib64/libQt5XcbQpa.so.5
#4  0x00007f51c4ec6a1a in QThreadPrivate::start(void*) () at /lib64/libQt5Core.so.5
#5  0x00007f51c36046ca in start_thread () at /lib64/libpthread.so.0
#6  0x00007f51c42b9f6f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f51b627d4c0 (LWP 1958)):
[KCrash Handler]
#6  0x00007f51c503797c in QSortFilterProxyModelPrivate::updateChildrenMapping(QModelIndex const&, QSortFilterProxyModelPrivate::Mapping*, Qt::Orientation, int, int, int, bool) () at /lib64/libQt5Core.so.5
#7  0x00007f51c5037cc2 in QSortFilterProxyModelPrivate::source_items_removed(QModelIndex const&, int, int, Qt::Orientation) [clone .part.78] () at /lib64/libQt5Core.so.5
#8  0x00007f51c503d529 in QSortFilterProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libQt5Core.so.5
#9  0x00007f51c508cff1 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#10 0x00007f51c50fa594 in QAbstractItemModel::rowsRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /lib64/libQt5Core.so.5
#11 0x00007f51c501c3fe in QAbstractItemModel::endRemoveRows() () at /lib64/libQt5Core.so.5
#12 0x00007f51081d3d98 in TaskManager::TaskGroupingProxyModel::Private::sourceRowsAboutToBeRemoved(QModelIndex const&, int, int) [clone .part.68] () at /lib64/libtaskmanager.so.6
#13 0x00007f51081d6df9 in TaskManager::TaskGroupingProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libtaskmanager.so.6
#14 0x00007f51c508cff1 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#15 0x00007f51c50fa524 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /lib64/libQt5Core.so.5
#16 0x00007f51c501bb73 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /lib64/libQt5Core.so.5
#17 0x00007f51c50365c5 in QSortFilterProxyModelPrivate::remove_proxy_interval(QVector<int>&, QVector<int>&, int, int, QModelIndex const&, Qt::Orientation, bool) () at /lib64/libQt5Core.so.5
#18 0x00007f51c503aed7 in QSortFilterProxyModelPrivate::remove_source_items(QVector<int>&, QVector<int>&, QVector<int> const&, QModelIndex const&, Qt::Orientation, bool) () at /lib64/libQt5Core.so.5
#19 0x00007f51c503b0e4 in QSortFilterProxyModelPrivate::source_items_about_to_be_removed(QModelIndex const&, int, int, Qt::Orientation) () at /lib64/libQt5Core.so.5
#20 0x00007f51c503d508 in QSortFilterProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libQt5Core.so.5
#21 0x00007f51c508cff1 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#22 0x00007f51c50fa524 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /lib64/libQt5Core.so.5
#23 0x00007f51c501bb73 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /lib64/libQt5Core.so.5
#24 0x00007f510addac55 in KConcatenateRowsProxyModelPrivate::slotRowsAboutToBeRemoved(QModelIndex const&, int, int) () at /lib64/libKF5ItemModels.so.5
#25 0x00007f510addc0c1 in KConcatenateRowsProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libKF5ItemModels.so.5
#26 0x00007f51c508cff1 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#27 0x00007f51c50fa524 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /lib64/libQt5Core.so.5
#28 0x00007f51c501bb73 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /lib64/libQt5Core.so.5
#29 0x00007f51c5032207 in QIdentityProxyModelPrivate::_q_sourceRowsAboutToBeRemoved(QModelIndex const&, int, int) () at /lib64/libQt5Core.so.5
#30 0x00007f51c5032cd9 in QIdentityProxyModel::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) () at /lib64/libQt5Core.so.5
#31 0x00007f51c508cff1 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#32 0x00007f51c50fa524 in QAbstractItemModel::rowsAboutToBeRemoved(QModelIndex const&, int, int, QAbstractItemModel::QPrivateSignal) () at /lib64/libQt5Core.so.5
#33 0x00007f51c501bb73 in QAbstractItemModel::beginRemoveRows(QModelIndex const&, int, int) () at /lib64/libQt5Core.so.5
#34 0x00007f51081edb43 in TaskManager::XWindowTasksModel::Private::removeWindow(unsigned long long) () at /lib64/libtaskmanager.so.6
#35 0x00007f51c508d326 in QMetaObject::activate(QObject*, int, int, void**) () at /lib64/libQt5Core.so.5
#36 0x00007f51c78d3e92 in KWindowSystem::windowRemoved(unsigned long long) () at /lib64/libKF5WindowSystem.so.5
#37 0x00007f51a92492d6 in NETEventFilter::removeClient(unsigned int) () at /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#38 0x00007f51c78cc372 in NETRootInfo::update(QFlags<NET::Property>, QFlags<NET::Property2>) () at /lib64/libKF5WindowSystem.so.5
#39 0x00007f51c78cd39c in NETRootInfo::event(xcb_generic_event_t*, QFlags<NET::Property>*, QFlags<NET::Property2>*) () at /lib64/libKF5WindowSystem.so.5
#40 0x00007f51c78cd6c2 in NETRootInfo::event(xcb_generic_event_t*, unsigned long*, int) () at /lib64/libKF5WindowSystem.so.5
#41 0x00007f51a9248a06 in NETEventFilter::nativeEventFilter(xcb_generic_event_t*) () at /usr/lib64/qt5/plugins/kf5/org.kde.kwindowsystem.platforms/KF5WindowSystemX11Plugin.so
#42 0x00007f51c506416c in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /lib64/libQt5Core.so.5
#43 0x00007f51af6b21f4 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /lib64/libQt5XcbQpa.so.5
#44 0x00007f51af6b2e85 in QXcbConnection::processXcbEvents() () at /lib64/libQt5XcbQpa.so.5
#45 0x00007f51c508e0d9 in QObject::event(QEvent*) () at /lib64/libQt5Core.so.5
#46 0x00007f51c593a96c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#47 0x00007f51c5942111 in QApplication::notify(QObject*, QEvent*) () at /lib64/libQt5Widgets.so.5
#48 0x00007f51c506612a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt5Core.so.5
#49 0x00007f51c5068800 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /lib64/libQt5Core.so.5
#50 0x00007f51c50b3cf3 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt5Core.so.5
#51 0x00007f51bd04ae42 in g_main_context_dispatch () at /lib64/libglib-2.0.so.0
#52 0x00007f51bd04b1c0 in g_main_context_iterate.isra () at /lib64/libglib-2.0.so.0
#53 0x00007f51bd04b26c in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#54 0x00007f51c50b3d6f in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#55 0x00007f51c50650ba in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt5Core.so.5
#56 0x00007f51c506cbac in QCoreApplication::exec() () at /lib64/libQt5Core.so.5
#57 0x00005630c5146322 in main ()

Possible duplicates by query: bug 372827, bug 371544, bug 367701, bug 366582.

Reported using DrKonqi

Comment 1 Christoph Feck 2016-11-30 00:59:15 UTC

It is a bit unfortunate that you are reporting two issues with a single ticket. I assume that the crash will be marked as a duplicate, so you should report the freezing separately.

Comment 2 Ugo Paternostro 2016-11-30 08:27:16 UTC

I would gladly, but I don't have clues for the freeze, so please just consider the crash ATM.

Maybe it is a duplicate of other tickets referring libthread_db, but I reported it because it happens in a different situation.

Comment 3 Marco Martin 2016-11-30 10:54:29 UTC


*** This bug has been marked as a duplicate of bug 342763 ***