Bug 358831

Summary:	kmessagedialog freezes when sound notification are activated
Product:	[Unmaintained] phonon-backend-gstreamer	Reporter:	Detlev Casanova <detlev.casanova>
Component:	general	Assignee:	Daniel Vrátil <dvratil>
Status:	RESOLVED UNMAINTAINED
Severity:	normal	CC:	cfeck, kdelibs-bugs-null, myriam, romain.perier, sitter, stupor_scurvy343, tdfischer
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Gentoo Packages
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Detlev Casanova 2016-01-31 17:27:57 UTC

Apparently, If Sound notication are enabled, KMessageDialog::questionYesNo freezes when it is shown (not drawn, no buttons) and no sound.

I saw that with KDevelop latest git version (for kf5)

Here is a calltrace (not full though, I need to recompile some packages if needed):

#0  0x00007ffff122ddb9 in syscall () from /lib64/libc.so.6
#1  0x00007fffe7be586f in g_cond_wait () from /usr/lib64/libglib-2.0.so.0
#2  0x00007fffe7bc8b0b in g_once_init_enter () from /usr/lib64/libglib-2.0.so.0
#3  0x00007fffd11f7e18 in gst_object_get_type () from /usr/lib64/libgstreamer-0.10.so.0
#4  0x00007fffd123d261 in gst_registry_get_type () from /usr/lib64/libgstreamer-0.10.so.0
#5  0x00007fffd123d4d5 in gst_registry_get_default () from /usr/lib64/libgstreamer-0.10.so.0
#6  0x00007fffd151701f in ?? () from /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#7  0x00007fffd150b3cd in ?? () from /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#8  0x00007fffd150b7f8 in qt_plugin_instance () from /usr/lib64/qt5/plugins/phonon4qt5_backend/phonon_gstreamer.so
#9  0x00007ffff1f4494f in QPluginLoader::instance() () from /usr/lib64/libQt5Core.so.5
#10 0x00007fffe7700368 in ?? () from /usr/lib64/libphonon4qt5.so.4
#11 0x00007fffe7702759 in ?? () from /usr/lib64/libphonon4qt5.so.4
#12 0x00007fffe7702f11 in ?? () from /usr/lib64/libphonon4qt5.so.4
#13 0x00007fffe770378d in Phonon::Factory::backend(bool) () from /usr/lib64/libphonon4qt5.so.4
#14 0x00007fffe7703da3 in ?? () from /usr/lib64/libphonon4qt5.so.4
#15 0x00007fffe76f8d84 in ?? () from /usr/lib64/libphonon4qt5.so.4
#16 0x00007fffe76f642e in ?? () from /usr/lib64/libphonon4qt5.so.4
#17 0x00007fffee5b5282 in NotifyByAudio::notify(KNotification*, KNotifyConfig*) () from /usr/lib64/libKF5Notifications.so.5
#18 0x00007fffee59a041 in KNotificationManager::notify(KNotification*) () from /usr/lib64/libKF5Notifications.so.5
#19 0x00007fffee597918 in KNotification::sendEvent() () from /usr/lib64/libKF5Notifications.so.5
#20 0x00007ffff1f7f08a in QObject::event(QEvent*) () from /usr/lib64/libQt5Core.so.5
#21 0x00007ffff290469c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#22 0x00007ffff2909b10 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#23 0x00007ffff1f55d8d in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib64/libQt5Core.so.5
#24 0x00007ffff1f58b63 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib64/libQt5Core.so.5
#25 0x00007ffff1fa3713 in postEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /usr/lib64/libQt5Core.so.5
#26 0x00007fffe7ba37d4 in g_main_context_dispatch () from /usr/lib64/libglib-2.0.so.0
#27 0x00007fffe7ba3a28 in ?? () from /usr/lib64/libglib-2.0.so.0
#28 0x00007fffe7ba3acc in g_main_context_iteration () from /usr/lib64/libglib-2.0.so.0
#29 0x00007ffff1fa3787 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#30 0x00007ffff1f549aa in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#31 0x00007ffff2aec015 in QDialog::exec() () from /usr/lib64/libQt5Widgets.so.5
#32 0x00007ffff3d0b3ec in KMessageBox::createKMessageBox(QDialog*, QDialogButtonBox*, QIcon const&, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&, QMessageBox::Icon) () from /usr/lib64/libKF5WidgetsAddons.so.5
#33 0x00007ffff3d0b686 in KMessageBox::createKMessageBox(QDialog*, QDialogButtonBox*, QMessageBox::Icon, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&) ()
   from /usr/lib64/libKF5WidgetsAddons.so.5
#34 0x00007ffff3d0bb52 in KMessageBox::questionYesNoListInternal(QDialog*, QString const&, QStringList const&, QString const&, KGuiItem const&, KGuiItem const&, QString const&, QFlags<KMessageBox::Option>) ()
   from /usr/lib64/libKF5WidgetsAddons.so.5
#35 0x00007ffff3d0bebc in KMessageBox::questionYesNo(QWidget*, QString const&, QString const&, KGuiItem const&, KGuiItem const&, QString const&, QFlags<KMessageBox::Option>) ()
   from /usr/lib64/libKF5WidgetsAddons.so.5
#36 0x00007ffff664c0bd in KDevelop::askUser(QString const&, QString const&, QString const&, QString const&, bool) () from /usr/local/lib64/libKDevPlatformUtil.so.10
#37 0x00007fffedc46e1b in (anonymous namespace)::shouldClear(QString const&) () from /usr/local/lib64/libKDevPlatformSerialization.so.10
#38 0x00007fffedc4783a in KDevelop::ItemRepositoryRegistryPrivate::open(QString const&) () from /usr/local/lib64/libKDevPlatformSerialization.so.10
#39 0x00007fffedc4708e in KDevelop::ItemRepositoryRegistry::ItemRepositoryRegistry(QSharedPointer<KDevelop::ISessionLock> const&) () from /usr/local/lib64/libKDevPlatformSerialization.so.10
#40 0x00007fffedc470ee in KDevelop::ItemRepositoryRegistry::initialize(QSharedPointer<KDevelop::ISessionLock> const&) () from /usr/local/lib64/libKDevPlatformSerialization.so.10
#41 0x00007fffef285693 in KDevelop::DUChain::initialize() () from /usr/local/lib64/libKDevPlatformLanguage.so.10
#42 0x00007ffff7a515b4 in KDevelop::CorePrivate::initialize(KDevelop::Core::Setup, QString) () from /usr/local/lib64/libKDevPlatformShell.so.10
#43 0x00007ffff7a52074 in KDevelop::Core::initialize(QObject*, KDevelop::Core::Setup, QString const&) () from /usr/local/lib64/libKDevPlatformShell.so.10
#44 0x0000000000418943 in main ()

Reproducible: Always

Steps to Reproduce:
1. Have kdevelop crash (kill -9 kdevelop)
2. rerun kdevelop and it tries to show a message related to the previous crash (the message box is frozen)
3.

Actual Results:  
the message box is frozen

Expected Results:  
should not be frozen

Comment 1 stupor_scurvy343 2016-02-14 15:54:17 UTC

Which version of phonon-gstreamer is installed, and which USE flags were qtwebkit built with?

Comment 2 Justin Zobel 2021-03-09 22:36:13 UTC

Thank you for the bug report.

As this report hasn't seen any changes in 5 years or more, we ask if you can please confirm that the issue still persists.

If this bug is no longer persisting or relevant please change the status to resolved.

Comment 3 Nate Graham 2022-11-24 02:29:47 UTC

This backend for Phonon is no longer maintained or supported, and has not been for quite some time. Please use the VLC backend instead--which is the recommended and maintained replacement--and see if you can reproduce the issue there. If you can, please open a new bug report at https://bugs.kde.org/enter_bug.cgi?product=phonon-backend-vlc.

Thanks a lot!