https://bugs.kde.org/show_bug.cgi?id=404305
--- Comment #1 from Paul Belanger <paulir...@gmail.com> ---
Relevant call stacks from the core file:
Thread 3 (the thread with 100% CPU usage on one core):
#0 0x00007fc51d417e15 in _nv014tls () from
/usr/lib/nvidia-410/tls/libnvidia-tls.so.410.78
#1 0x00007fc520c0ee2d in ?? () from /usr/lib/nvidia-410/libGL.so.1
#2 0x00007fc51d41811f in ?? () from
/usr/lib/nvidia-410/tls/libnvidia-tls.so.410.78
#3 0x00007fc51e7ce796 in ?? () from
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#4 0x00007fc5196b6078 in ?? () from
/usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-8.0.so
#5 0x00007fc521cb76ba in start_thread (arg=0x7fc5042e3700) at
pthread_create.c:333
#6 0x00007fc52980041d in clone () at
../sysdeps/unix/sysv/linux/x86_64/clone.S:109
Thread 1 (GUI Thread):
#0 pthread_cond_wait@@GLIBC_2.3.2 () at
../sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:143
#1 0x00007fc51e7cee48 in pa_threaded_mainloop_wait () from
/usr/lib/x86_64-linux-gnu/libpulse.so.0
#2 0x00007fc5042edf3f in ?? () from
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstpulse.so
#3 0x00007fc50875319b in gst_audio_ring_buffer_open_device () from
/usr/lib/x86_64-linux-gnu/libgstaudio-1.0.so.0
#4 0x00007fc508772db9 in ?? () from
/usr/lib/x86_64-linux-gnu/libgstaudio-1.0.so.0
#5 0x00007fc5042f1802 in ?? () from
/usr/lib/x86_64-linux-gnu/gstreamer-1.0/libgstpulse.so
#6 0x00007fc50986e1ce in gst_element_change_state
(element=element@entry=0x1b57ac0,
transition=transition@entry=GST_STATE_CHANGE_NULL_TO_READY) at
gstelement.c:2648
#7 0x00007fc50986e947 in gst_element_set_state_func (element=0x1b57ac0,
state=GST_STATE_READY) at gstelement.c:2602
#8 0x00007fc509b5d798 in Phonon::Gstreamer::DeviceManager::canOpenDevice
(this=<optimized out>, element=0x1b57ac0) at
../../gstreamer/devicemanager.cpp:239
#9 0x00007fc509b5dbbf in Phonon::Gstreamer::DeviceManager::createAudioSink
(this=this@entry=0x18bc5a0, category=category@entry=Phonon::NoCategory) at
../../gstreamer/devicemanager.cpp:317
#10 0x00007fc509b5f562 in
Phonon::Gstreamer::DeviceManager::updateDeviceList (this=this@entry=0x18bc5a0)
at ../../gstreamer/devicemanager.cpp:457
#11 0x00007fc509b60680 in Phonon::Gstreamer::DeviceManager::DeviceManager
(this=0x18bc5a0, backend=<optimized out>) at
../../gstreamer/devicemanager.cpp:197
#12 0x00007fc509b5826c in Phonon::Gstreamer::Backend::Backend
(this=0x19b65b0, parent=<optimized out>) at ../../gstreamer/backend.cpp:123
#13 0x00007fc509b586a8 in qt_plugin_instance () at ./moc_backend.cpp:248
#14 0x00007fc526360abf in QPluginLoader::instance() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007fc5246bb398 in Phonon::FactoryPrivate::tryCreateBackend
(this=this@entry=0x1606760, path=...) at ../../phonon/factory.cpp:117
#16 0x00007fc5246bd7e7 in Phonon::FactoryPrivate::createSuitableBackend
(this=this@entry=0x1606760,
libPath="/usr/lib/x86_64-linux-gnu/qt5/plugins/phonon4qt5_backend/", plugins=)
at ../../phonon/factory.cpp:219
#17 0x00007fc5246bda11 in Phonon::FactoryPrivate::createBackend
(this=this@entry=0x1606760) at ../../phonon/factory.cpp:303
#18 0x00007fc5246be2c0 in Phonon::Factory::backend
(createWhenNull=createWhenNull@entry=true) at ../../phonon/factory.cpp:576
#19 0x00007fc5246be7e3 in Phonon::Factory::createAudioOutput
(parent=0x17c3580) at ../../phonon/factory.cpp:470
#20 0x00007fc5246b4de9 in Phonon::AudioOutputPrivate::createBackendObject
(this=0x15fbff0) at ../../phonon/audiooutput.cpp:133
#21 0x00007fc5246b18cf in Phonon::AudioOutputPrivate::init (this=0x15fbff0,
c=Phonon::NotificationCategory) at ../../phonon/audiooutput.cpp:100
#22 0x00007fc525b586a2 in ?? () from
/usr/lib/x86_64-linux-gnu/libKF5Notifications.so.5
#23 0x00007fc525b3ce96 in ?? () from
/usr/lib/x86_64-linux-gnu/libKF5Notifications.so.5
#24 0x00007fc525b3a598 in KNotification::sendEvent() () from
/usr/lib/x86_64-linux-gnu/libKF5Notifications.so.5
#25 0x00007fc5263a6c01 in QObject::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007fc526c6a05c in QApplicationPrivate::notify_helper(QObject*,
QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#27 0x00007fc526c6f516 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#28 0x00007fc52637738b in QCoreApplication::notifyInternal(QObject*,
QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#29 0x00007fc526379786 in
QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#30 0x00007fc5263cd3c3 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#31 0x00007fc521580197 in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#32 0x00007fc5215803f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#33 0x00007fc52158049c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#34 0x00007fc5263cd7cf in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007fc526374b4a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#36 0x00007fc526e64d8d in QDialog::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#37 0x00007fc5274dbe59 in KMessageBox::createKMessageBox(QDialog*,
QDialogButtonBox*, QIcon const&, QString const&, QStringList const&, QString
const&, bool*, QFlags<KMessageBox::Option>, QString const&, QMessageBox::Icon)
()
from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#38 0x00007fc5274dc538 in KMessageBox::createKMessageBox(QDialog*,
QDialogButtonBox*, QMessageBox::Icon, QString const&, QStringList const&,
QString const&, bool*, QFlags<KMessageBox::Option>, QString const&) ()
from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#39 0x00007fc5274dec2c in ?? () from
/usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#40 0x00007fc529ade6bc in ?? () from
/usr/lib/x86_64-linux-gnu/libkdeinit5_konsole.so
#41 0x00007fc528ad5f15 in KMainWindow::closeEvent(QCloseEvent*) () from
/usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#42 0x00007fc526cacfc8 in QWidget::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#43 0x00007fc526dc2dbb in QMainWindow::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#44 0x00007fc528ad6147 in KMainWindow::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#45 0x00007fc528b0e4e5 in KXmlGuiWindow::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libKF5XmlGui.so.5
#46 0x00007fc526c6a05c in QApplicationPrivate::notify_helper(QObject*,
QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#47 0x00007fc526c6f516 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#48 0x00007fc52637738b in QCoreApplication::notifyInternal(QObject*,
QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#49 0x00007fc526ca82bd in
QWidgetPrivate::close_helper(QWidgetPrivate::CloseMode) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#50 0x00007fc526cc9cc2 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#51 0x00007fc526c6a05c in QApplicationPrivate::notify_helper(QObject*,
QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#52 0x00007fc526c6f516 in QApplication::notify(QObject*, QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#53 0x00007fc52637738b in QCoreApplication::notifyInternal(QObject*,
QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#54 0x00007fc5266b667e in
QGuiApplicationPrivate::processCloseEvent(QWindowSystemInterfacePrivate::CloseEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#55 0x00007fc5266bb1d5 in
QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#56 0x00007fc52669ef08 in
QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>)
() from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#57 0x00007fc51735a200 in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#58 0x00007fc521580197 in g_main_context_dispatch () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#59 0x00007fc5215803f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#60 0x00007fc52158049c in g_main_context_iteration () from
/lib/x86_64-linux-gnu/libglib-2.0.so.0
#61 0x00007fc5263cd7cf in
QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#62 0x00007fc526374b4a in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#63 0x00007fc52637cbec in QCoreApplication::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#64 0x00007fc529aead92 in kdemain () from
/usr/lib/x86_64-linux-gnu/libkdeinit5_konsole.so
#65 0x00007fc529719830 in __libc_start_main (main=0x400710 <main>, argc=1,
argv=0x7ffda197fd98, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7ffda197fd88) at ../csu/libc-start.c:291
#66 0x0000000000400749 in _start ()
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