Bug 365465

Summary: Kwin hangs
Product: [Plasma] kwin Reporter: Daniel Cassela <daniel>
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED UPSTREAM    
Severity: crash Keywords: drkonqi
Priority: NOR    
Version First Reported In: 5.5.5   
Target Milestone: ---   
Platform: openSUSE   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Daniel Cassela 2016-07-12 10:41:15 UTC
Application: kwin_x11 (5.5.5)

Qt Version: 5.5.1
Operating System: Linux 4.1.26-21-default x86_64
Distribution: "openSUSE Leap 42.1 (x86_64)"

-- Information about the crash:
Kwin hangs during chrome profile change.

Only firefox was running when the crashes occurred.

I was able to continue working, but KWIN was unstable.

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7fbd327d1800 (LWP 1948))]

Thread 5 (Thread 0x7fbd196f9700 (LWP 1951)):
#0  0x00007fbd3214fbfd in poll () at /lib64/libc.so.6
#1  0x00007fbd2fa93422 in  () at /usr/lib64/libxcb.so.1
#2  0x00007fbd2fa9500f in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007fbd19fa03c9 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007fbd2fd5332f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007fbd317840a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007fbd3215802d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7fbd125c1700 (LWP 1962)):
#0  0x00007fbd32151293 in select () at /lib64/libc.so.6
#1  0x00007fbd2ff82179 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fbd2ff83af5 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007fbd2ff83f3b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fbd2ff2cd53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fbd2fd4e61a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fbd2a250e18 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fbd2fd5332f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fbd317840a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fbd3215802d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7fbd0b7fe700 (LWP 1978)):
#0  0x00007fbd3178803f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007fbd2ecd686b in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007fbd2ecd6899 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007fbd317840a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007fbd3215802d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7fbd0bfff700 (LWP 2438)):
#0  0x00007fbd32151293 in select () at /lib64/libc.so.6
#1  0x00007fbd2ff82179 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007fbd2ff83af5 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007fbd2ff83f3b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007fbd2ff2cd53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007fbd2fd4e61a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007fbd2a250e18 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fbd2fd5332f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007fbd317840a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007fbd3215802d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7fbd327d1800 (LWP 1948)):
[KCrash Handler]
#6  0x00007fbd2a11528f in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007fbd2a1156f0 in QV4::ExecutionEngine::toVariant(QV4::Value const&, int, bool) () at /usr/lib64/libQt5Qml.so.5
#8  0x00007fbd2a1d3aea in QQmlPropertyPrivate::writeBinding(QObject*, QQmlPropertyData const&, QQmlContextData*, QQmlJavaScriptExpression*, QV4::Value const&, bool, QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib64/libQt5Qml.so.5
#9  0x00007fbd2a23d843 in QQmlBinding::update(QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib64/libQt5Qml.so.5
#10 0x00007fbd2a24756a in  () at /usr/lib64/libQt5Qml.so.5
#11 0x00007fbd2a1d5e4b in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () at /usr/lib64/libQt5Qml.so.5
#12 0x00007fbd2a1d5f07 in QQmlComponentPrivate::completeCreate() () at /usr/lib64/libQt5Qml.so.5
#13 0x00007fbd2a1d5d90 in QQmlComponent::create(QQmlContext*) () at /usr/lib64/libQt5Qml.so.5
#14 0x00007fbd125e083f in  () at /usr/lib64/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#15 0x00007fbd31d89cfb in  () at /usr/lib64/libkwin.so.5
#16 0x00007fbd31c8aad1 in  () at /usr/lib64/libkwin.so.5
#17 0x00007fbd31c8b64b in  () at /usr/lib64/libkwin.so.5
#18 0x00007fbd31cda53a in  () at /usr/lib64/libkwin.so.5
#19 0x00007fbd31c6e9eb in KWin::Workspace::createClient(unsigned int, bool) () at /usr/lib64/libkwin.so.5
#20 0x00007fbd31cc208e in KWin::Workspace::workspaceEvent(xcb_generic_event_t*) () at /usr/lib64/libkwin.so.5
#21 0x00007fbd2ff2bfc0 in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib64/libQt5Core.so.5
#22 0x00007fbd19f9e044 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib64/libQt5XcbQpa.so.5
#23 0x00007fbd19fa001b in QXcbConnection::processXcbEvents() () at /usr/lib64/libQt5XcbQpa.so.5
#24 0x00007fbd2ff5fac6 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#25 0x00007fbd30c12e7c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#26 0x00007fbd30c17cc8 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#27 0x00007fbd2ff2ee95 in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#28 0x00007fbd2ff31057 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#29 0x00007fbd2ff83ec4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#30 0x00007fbd1a00033d in  () at /usr/lib64/libQt5XcbQpa.so.5
#31 0x00007fbd2ff2cd53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#32 0x00007fbd2ff348f6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#33 0x00007fbd324209e7 in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so
#34 0x00007fbd32094b25 in __libc_start_main () at /lib64/libc.so.6
#35 0x000000000040085e in _start ()

Reported using DrKonqi
Comment 1 Martin Flöser 2016-07-12 10:48:17 UTC
Crashes in QtQuick. As a workaround use the breeze window decoration.
Comment 2 Daniel Cassela 2016-07-12 11:21:48 UTC
I changed to breeze window decoration and restarted X session. But when i opened chrome  the problem persist.
Comment 3 Martin Flöser 2016-07-12 12:49:57 UTC
(In reply to Daniel Cassela from comment #2)
> I changed to breeze window decoration and restarted X session. But when i
> opened chrome  the problem persist.

That must be a completely different issue then. Can you paste the backtrace of KWin when opening Chrome?
Comment 4 Thomas Lübking 2016-07-12 19:01:51 UTC
ftr, change the settings in "kcmshell5 kwindecoration" - settings in "kcmshell5 style" are irrelevant here.
Comment 5 Daniel Cassela 2016-07-13 10:39:36 UTC
Backtrace what happened now. I'm not using chrome at this time. I was editing Kde menu apps.

Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3748750800 (LWP 1877))]

Thread 5 (Thread 0x7f372f678700 (LWP 1884)):
#0  0x00007f37480cebfd in poll () at /lib64/libc.so.6
#1  0x00007f3745a12422 in  () at /usr/lib64/libxcb.so.1
#2  0x00007f3745a1400f in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007f372ff1f3c9 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007f3745cd232f in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f37477030a4 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f37480d702d in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f3727ddf700 (LWP 1898)):
#0  0x00007f37480d0293 in select () at /lib64/libc.so.6
#1  0x00007f3745f01179 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f3745f02af5 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f3745f02f3b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f3745eabd53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f3745ccd61a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f37401cfe18 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f3745cd232f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f37477030a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f37480d702d in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f3724904700 (LWP 1926)):
#0  0x00007f374770703f in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f3744c5586b in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007f3744c55899 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007f37477030a4 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f37480d702d in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f3690e24700 (LWP 3078)):
#0  0x00007f37480d0293 in select () at /lib64/libc.so.6
#1  0x00007f3745f01179 in qt_safe_select(int, fd_set*, fd_set*, fd_set*, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f3745f02af5 in QEventDispatcherUNIXPrivate::doSelect(QFlags<QEventLoop::ProcessEventsFlag>, timespec*) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f3745f02f3b in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f3745eabd53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#5  0x00007f3745ccd61a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#6  0x00007f37401cfe18 in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f3745cd232f in  () at /usr/lib64/libQt5Core.so.5
#8  0x00007f37477030a4 in start_thread () at /lib64/libpthread.so.0
#9  0x00007f37480d702d in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f3748750800 (LWP 1877)):
[KCrash Handler]
#6  0x00007f374009428f in  () at /usr/lib64/libQt5Qml.so.5
#7  0x00007f37400946f0 in QV4::ExecutionEngine::toVariant(QV4::Value const&, int, bool) () at /usr/lib64/libQt5Qml.so.5
#8  0x00007f3740152aea in QQmlPropertyPrivate::writeBinding(QObject*, QQmlPropertyData const&, QQmlContextData*, QQmlJavaScriptExpression*, QV4::Value const&, bool, QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib64/libQt5Qml.so.5
#9  0x00007f37401bc843 in QQmlBinding::update(QFlags<QQmlPropertyPrivate::WriteFlag>) () at /usr/lib64/libQt5Qml.so.5
#10 0x00007f37401c656a in  () at /usr/lib64/libQt5Qml.so.5
#11 0x00007f3740154e4b in QQmlComponentPrivate::complete(QQmlEnginePrivate*, QQmlComponentPrivate::ConstructionState*) () at /usr/lib64/libQt5Qml.so.5
#12 0x00007f3740154f07 in QQmlComponentPrivate::completeCreate() () at /usr/lib64/libQt5Qml.so.5
#13 0x00007f3740154d90 in QQmlComponent::create(QQmlContext*) () at /usr/lib64/libQt5Qml.so.5
#14 0x00007f372c11c83f in  () at /usr/lib64/qt5/plugins/org.kde.kdecoration2/kwin5_aurorae.so
#15 0x00007f3747d08cfb in  () at /usr/lib64/libkwin.so.5
#16 0x00007f3747c09ad1 in  () at /usr/lib64/libkwin.so.5
#17 0x00007f3747c0a64b in  () at /usr/lib64/libkwin.so.5
#18 0x00007f3747c5953a in  () at /usr/lib64/libkwin.so.5
#19 0x00007f3747bed9eb in KWin::Workspace::createClient(unsigned int, bool) () at /usr/lib64/libkwin.so.5
#20 0x00007f3747c4108e in KWin::Workspace::workspaceEvent(xcb_generic_event_t*) () at /usr/lib64/libkwin.so.5
#21 0x00007f3745eaafc0 in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib64/libQt5Core.so.5
#22 0x00007f372ff1d044 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib64/libQt5XcbQpa.so.5
#23 0x00007f372ff1f01b in QXcbConnection::processXcbEvents() () at /usr/lib64/libQt5XcbQpa.so.5
#24 0x00007f3745edeac6 in QObject::event(QEvent*) () at /usr/lib64/libQt5Core.so.5
#25 0x00007f3746b91e7c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#26 0x00007f3746b96cc8 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#27 0x00007f3745eade95 in QCoreApplication::notifyInternal(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#28 0x00007f3745eb0057 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib64/libQt5Core.so.5
#29 0x00007f3745f02ec4 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#30 0x00007f372ff7f33d in  () at /usr/lib64/libQt5XcbQpa.so.5
#31 0x00007f3745eabd53 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#32 0x00007f3745eb38f6 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#33 0x00007f374839f9e7 in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so
#34 0x00007f3748013b25 in __libc_start_main () at /lib64/libc.so.6
#35 0x000000000040085e in _start ()
Comment 6 Daniel Cassela 2016-07-13 10:54:17 UTC
Hi Thomas,

The backtrace sent was generated while "kcmshell5 kwindecoration" was Plastik, i just change to "breeze", i'll monitor from now.
Comment 7 Thomas Lübking 2016-07-13 13:52:14 UTC
Plastik is more or less an aurorae theme, so that's in pattern :-P

Breeze is presently really the *only* reliable decoration :-(
All others suffer from QML.