Bug 372304

Summary:	kwin_x11 crashes frequently on me when opening a window/application (Intel Skylake Graphics)
Product:	[Plasma] kwin	Reporter:	foss
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	crash	Keywords:	drkonqi, triaged
Priority:	NOR
Version:	5.8.3
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description foss 2016-11-10 20:01:25 UTC

Application: kwin_x11 (5.8.3)

Qt Version: 5.7.0
Frameworks Version: 5.27.0
Operating System: Linux 4.8.6-1-ARCH x86_64
Distribution (Platform): Archlinux Packages

-- Information about the crash:
- What I was doing when the application crashed:
Kwin_x11 randomly crashes when just opening windows/programms, several times per day.
- Unusual behavior I noticed:
As a result of the crashe(s), the open window(s) are not correctly rendered, I mean the graphical glitches. Some parts of the window(s) like titelbars
are out of the screen...   
- Custom settings of the application:
I am not sure if related, but I use the 'Plastik' window decoration (Don't like the breeze decoration), 'Breeze' as "Widget style" and the rest
(Color,Look and Feel, Desktop Theme) is "Breeze Dark".
A graphics driver is not installed (modesetting) https://linux.die.net/man/4/modesetting and no other graphics settings are set/changed (xorg,kernel parameters).
One more thing(not bug relevant) is that with same hardware, same OS/Apps, but other DEs (mainly Xfce and Mate without the KDE apps),no crashes...

Now, I am quite sure there are other similar bug reports related to Kwin_x11 crashes, so what makes my report different/relevant..?  Well, I have
honestly no idea, all I know is that it's annoying with this frequent crashes (on two machines, thinkpad L460 and E130) and hopefully it get fixed "soon". 
It wasn't actually intended to submit this bug report, because I know that it's difficult to reproduce but "DrKonqi" said I should, so I did :)

The crash can be reproduced sometimes.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/usr/lib/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f8a66a7f840 (LWP 5993))]

Thread 4 (Thread 0x7f8a2e82a700 (LWP 6011)):
#0  0x00007ffe11b39b02 in clock_gettime ()
#1  0x00007f8a664b86b6 in clock_gettime () at /usr/lib/libc.so.6
#2  0x00007f8a639ce1a1 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f8a63b553a9 in QTimerInfoList::updateCurrentTime() () at /usr/lib/libQt5Core.so.5
#4  0x00007f8a63b55955 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/libQt5Core.so.5
#5  0x00007f8a63b54694 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f8a63b0123a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f8a639240f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f8a63928d78 in  () at /usr/lib/libQt5Core.so.5
#9  0x00007f8a5f74f454 in start_thread () at /usr/lib/libpthread.so.0
#10 0x00007f8a664ab7df in clone () at /usr/lib/libc.so.6

Thread 3 (Thread 0x7f8a2f82b700 (LWP 6010)):
#0  0x00007ffe11b39b02 in clock_gettime ()
#1  0x00007f8a664b86b6 in clock_gettime () at /usr/lib/libc.so.6
#2  0x00007f8a639ce1a1 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f8a63b553a9 in QTimerInfoList::updateCurrentTime() () at /usr/lib/libQt5Core.so.5
#4  0x00007f8a63b55955 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/libQt5Core.so.5
#5  0x00007f8a63b54694 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f8a63b0123a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f8a639240f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f8a5e4aa2d5 in  () at /usr/lib/libQt5Qml.so.5
#9  0x00007f8a63928d78 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007f8a5f74f454 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007f8a664ab7df in clone () at /usr/lib/libc.so.6

Thread 2 (Thread 0x7f8a4a291700 (LWP 5997)):
#0  0x00007ffe11b39b02 in clock_gettime ()
#1  0x00007f8a664b86b6 in clock_gettime () at /usr/lib/libc.so.6
#2  0x00007f8a639ce1a1 in  () at /usr/lib/libQt5Core.so.5
#3  0x00007f8a63b553a9 in QTimerInfoList::updateCurrentTime() () at /usr/lib/libQt5Core.so.5
#4  0x00007f8a63b55955 in QTimerInfoList::timerWait(timespec&) () at /usr/lib/libQt5Core.so.5
#5  0x00007f8a63b54694 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#6  0x00007f8a63b0123a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#7  0x00007f8a639240f3 in QThread::exec() () at /usr/lib/libQt5Core.so.5
#8  0x00007f8a5d674e55 in  () at /usr/lib/libQt5DBus.so.5
#9  0x00007f8a63928d78 in  () at /usr/lib/libQt5Core.so.5
#10 0x00007f8a5f74f454 in start_thread () at /usr/lib/libpthread.so.0
#11 0x00007f8a664ab7df in clone () at /usr/lib/libc.so.6

Thread 1 (Thread 0x7f8a66a7f840 (LWP 5993)):
[KCrash Handler]
#6  0x00007f8a5e441254 in  () at /usr/lib/libQt5Qml.so.5
#7  0x00007f8a5e43eeb2 in QQmlMetaType::qmlSingletonTypes() () at /usr/lib/libQt5Qml.so.5
#8  0x00007f8a5e4162d0 in QQmlEngine::~QQmlEngine() () at /usr/lib/libQt5Qml.so.5
#9  0x00007f8a5e416449 in QQmlEngine::~QQmlEngine() () at /usr/lib/libQt5Qml.so.5
#10 0x00007f8a663f8990 in __run_exit_handlers () at /usr/lib/libc.so.6
#11 0x00007f8a663f89ea in  () at /usr/lib/libc.so.6
#12 0x00007f8a4cc60ba3 in  () at /usr/lib/libQt5XcbQpa.so.5
#13 0x00007f8a63b2f4b9 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#14 0x00007f8a647e2e0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#15 0x00007f8a647ea581 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#16 0x00007f8a63b02de0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#17 0x00007f8a63b0556d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#18 0x00007f8a66768a26 in  () at /usr/lib/libkdeinit5_kwin_x11.so
#19 0x00007f8a63b2e659 in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib/libQt5Core.so.5
#20 0x00007f8a6511656b in KSelectionOwner::filterEvent(void*) () at /usr/lib/libKF5WindowSystem.so.5
#21 0x00007f8a63b0037f in QAbstractEventDispatcher::filterNativeEvent(QByteArray const&, void*, long*) () at /usr/lib/libQt5Core.so.5
#22 0x00007f8a4cc5fc14 in QXcbConnection::handleXcbEvent(xcb_generic_event_t*) () at /usr/lib/libQt5XcbQpa.so.5
#23 0x00007f8a4cc608a5 in QXcbConnection::processXcbEvents() () at /usr/lib/libQt5XcbQpa.so.5
#24 0x00007f8a63b2f4b9 in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#25 0x00007f8a647e2e0c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#26 0x00007f8a647ea581 in QApplication::notify(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#27 0x00007f8a63b02de0 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#28 0x00007f8a63b0556d in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () at /usr/lib/libQt5Core.so.5
#29 0x00007f8a63b541fa in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#30 0x00007f8a4ccd70dd in  () at /usr/lib/libQt5XcbQpa.so.5
#31 0x00007f8a63b0123a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#32 0x00007f8a63b0973c in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#33 0x00007f8a6676a495 in kdemain () at /usr/lib/libkdeinit5_kwin_x11.so
#34 0x00007f8a663e3291 in __libc_start_main () at /usr/lib/libc.so.6
#35 0x000000000040069a in _start ()

Reported using DrKonqi

Comment 1 Martin Flöser 2016-11-11 06:37:22 UTC

Unfortunately the backtrace is lacking debug symbols, due to that we don't see why and where it crashes.

As you mention Plastik: please try using breeze. We have seen lots of crashes with the Aurorae based decoration unfortunately.

Comment 2 foss 2016-11-12 09:25:43 UTC

(In reply to Martin Gräßlin from comment #1)
> Unfortunately the backtrace is lacking debug symbols, due to that we don't
> see why and where it crashes.
> 
> As you mention Plastik: please try using breeze. We have seen lots of
> crashes with the Aurorae based decoration unfortunately.

Thanks for your reply.
Ok, I changed to breeze and since then it didn't crash (yet), hopefully not anymore. Will report back if it crashes again...
Thank you guys for your time and your effort.

Comment 3 foss 2017-01-12 22:23:57 UTC

I just want to report back, that still no crashes since I switched back to default window decoration!. So, with the missing debug symbols, I suppose I can't do 'anything' about the 'NEEDSINFO BACKTRACE' status. 
 
Am wondering, if the "Plastik" thing is so buggy, why not remove it till it is usable. Anyway, feel free to close. 

Thanks.

Comment 4 Christoph Feck 2017-01-25 16:10:00 UTC

Plastik is actually an Aurorae theme, and removing Aurorae would mean the user could no longer install new decorations from the KDE store.

It is still unclear if crashes with the Aurorae engine are due to a Qt5 bugs, or caused by the Aurorae port to Qt5.

Comment 5 Andrew Crouthamel 2018-09-26 22:07:44 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days, the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please set the bug status as REPORTED so that the KDE team knows that the bug is ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 6 Andrew Crouthamel 2018-10-27 02:51:17 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information.

For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!