437693 – KWin crashes in KWin::X11StandalonePlatform::createOpenGLSafePoint() on login

Bug 437693 - KWin crashes in KWin::X11StandalonePlatform::createOpenGLSafePoint() on login

Summary: KWin crashes in KWin::X11StandalonePlatform::createOpenGLSafePoint() on login

Status:	REPORTED

Alias:	None

Product:	kwin
Classification:	Plasma
Component:	platform-x11-standalone (show other bugs)
Version:	unspecified
Platform:	Neon Linux

Importance:	NOR crash
Target Milestone:	---
Assignee:	KWin default assignee

URL:
Keywords:	drkonqi

Depends on:
Blocks:

Reported:	2021-05-26 08:44 UTC by Kaleb
Modified:	2021-05-26 22:03 UTC (History)
CC List:	1 user (show)

See Also:
Latest Commit:
Version Fixed In:

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Description Kaleb 2021-05-26 08:44:25 UTC

Application: kwin_x11 (5.22.80)

Qt Version: 5.15.2
Frameworks Version: 5.83.0
Operating System: Linux 5.4.0-73-generic x86_64
Windowing System: X11
Drkonqi Version: 5.22.80
Distribution: KDE neon Unstable Edition

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

 Logging in after doing a system upgrade that fixed the other bug that I encountered shortly before this


- Unusual behavior I noticed:

 I encountered a bug where it skips the display manager entirely and throws me into a logged in blank desktop (The KDE Plasma startup animation never played either.) where the only window that opens is QjackCtl (I have it set to open on startup.) I was able to fully access all of my applications with the usage of Ctrl+T and the package names. I also tried logging out and back in with Ctrl+Alt+Del and it took me to the display manager but when I tried to login it would freeze after the startup animation was about half way done. This bug also persisted after reboot. I ended up using TTY3 to perform a full system upgrade (after attempting to use 'pkcon upgrade' in a terminal (on the strange black screen desktop,) but it would hang when it attempted to install the packages, so I had no choice but to use 'apt dist-upgrade' to attempt to save my system. After the reboot, I was greeteed by the display manager, (I've never been so happy to see it in my life lol,) but when I logged in the animation got to about 75% through then the animation stopped for about 5 seconds and then KWin crashed and it finished starting up as normal. I'm not sure if either of these bugs are related in anyway but it's weird how I encountered them one right after the other.

TLDR: KWin crashed on boot after encountering a bug that threw me into a logged in but messed up desktop that gave me access to my applications via the terminal keyboard shortcut and the package name. (I have a photo of the desktop bug that I sent to my friends but I didn't think to take a screenshot because I planned on doing a fresh install)

- Custom settings:

So far the only changes I've made to my settings is that I enabled dark mode and applied a theme.

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Aborted

[New LWP 1300]
[New LWP 1215]
[New LWP 1209]
[New LWP 1210]
[New LWP 1211]
[New LWP 1212]
[New LWP 1320]
[New LWP 1189]
[New LWP 1331]
[New LWP 1262]
[New LWP 1205]
[New LWP 1311]
[New LWP 1312]
[New LWP 1313]
[New LWP 1314]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/bin/kwin_x11'.
Program terminated with signal SIGABRT, Aborted.
#0  __GI_raise (sig=<optimized out>) at ../sysdeps/unix/sysv/linux/raise.c:50
[Current thread is 1 (Thread 0x7fe6e77bf700 (LWP 1300))]
[Current thread is 1 (Thread 0x7fe6e77bf700 (LWP 1300))]

Thread 15 (Thread 0x7fe6e567a700 (LWP 1314)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fe704000fe8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fe704000f98, cond=0x7fe704000fc0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fe704000fc0, mutex=0x7fe704000f98) at pthread_cond_wait.c:647
#3  0x00007fe708965e6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fe708965a6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fe6e5e7b700 (LWP 1313)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fe704000fe8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fe704000f98, cond=0x7fe704000fc0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fe704000fc0, mutex=0x7fe704000f98) at pthread_cond_wait.c:647
#3  0x00007fe708965e6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fe708965a6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fe6e667c700 (LWP 1312)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fe704000fe8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fe704000f98, cond=0x7fe704000fc0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fe704000fc0, mutex=0x7fe704000f98) at pthread_cond_wait.c:647
#3  0x00007fe708965e6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fe708965a6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fe6e6e7d700 (LWP 1311)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fe704000fe8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fe704000f98, cond=0x7fe704000fc0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fe704000fc0, mutex=0x7fe704000f98) at pthread_cond_wait.c:647
#3  0x00007fe708965e6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fe708965a6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fe709d48700 (LWP 1205)):
#0  0x00007fe710cb1bf6 in __ppoll (fds=0x7fe6fc007508, nfds=2, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007fe711318e10 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fe71131a5a3 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fe7112c11eb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe7110dba52 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe710f87f4b in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x00007fe7110dcbec in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#8  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fe700b1b700 (LWP 1262)):
#0  0x00007fe710cb1bf6 in __ppoll (fds=0x7fe6e0000d78, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007fe711318ef9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fe71131a5a3 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fe7112c11eb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe7110dba52 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe70fd59fa9 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007fe7110dcbec in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#8  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fe6caefa700 (LWP 1331)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7fe6caef9c50, clockid=<optimized out>, expected=0, futex_word=0x55612f36d6a0) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7fe6caef9c50, clockid=<optimized out>, mutex=0x55612f36d650, cond=0x55612f36d678) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x55612f36d678, mutex=0x55612f36d650, abstime=0x7fe6caef9c50) at pthread_cond_wait.c:665
#3  0x00007fe7110e2ce8 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe7110e01f1 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe7110dcbec in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fe70b40d8c0 (LWP 1189)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007fe7110dee91 in QSemaphore::acquire(int) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fe7112f9662 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fe7112f2b83 in QObject::destroyed(QObject*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe7112f7955 in QObject::~QObject() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe710fecd4d in QDBusServiceWatcher::~QDBusServiceWatcher() () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x00007fe7112eccfe in QObjectPrivate::deleteChildren() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007fe7112f7726 in QObject::~QObject() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fe70f8930bd in ?? () from /lib/x86_64-linux-gnu/libKF5GlobalAccel.so.5
#9  0x00007fe710be5a27 in __run_exit_handlers (status=1, listp=0x7fe710d87718 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true, run_dtors=run_dtors@entry=true) at exit.c:108
#10 0x00007fe710be5be0 in __GI_exit (status=<optimized out>) at exit.c:139
#11 0x00007fe70f56f0a3 in _XDefaultIOError () from /lib/x86_64-linux-gnu/libX11.so.6
#12 0x00007fe70ad832ae in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#13 0x00007fe70f56f352 in _XIOError () from /lib/x86_64-linux-gnu/libX11.so.6
#14 0x00007fe70f56c498 in ?? () from /lib/x86_64-linux-gnu/libX11.so.6
#15 0x00007fe70f56ccad in _XFlush () from /lib/x86_64-linux-gnu/libX11.so.6
#16 0x00007fe70f56f9dd in _XGetRequest () from /lib/x86_64-linux-gnu/libX11.so.6
#17 0x00007fe7094ec4a1 in ?? () from /lib/x86_64-linux-gnu/libGLX_mesa.so.0
#18 0x00007fe7094ec923 in ?? () from /lib/x86_64-linux-gnu/libGLX_mesa.so.0
#19 0x00007fe70db902d5 in glXCreatePixmap () from /lib/x86_64-linux-gnu/libGLX.so.0
#20 0x00007fe70816da82 in KWin::GlxPixmapTexturePrivate::create (this=0x55612f373f90, texture=0x55612fbef060) at ./src/plugins/platforms/x11/standalone/glxbackend.h:82
#21 0x00007fe70816dc1e in KWin::GlxPixmapTexture::create (texture=<optimized out>, this=0x55612f2b1050) at ./src/plugins/platforms/x11/standalone/glxbackend.cpp:821
#22 KWin::GlxSurfaceTextureX11::create (this=0x55612f2b2e90) at ./src/plugins/platforms/x11/standalone/glxbackend.cpp:800
#23 0x00007fe7000ab32d in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#24 0x00007fe7000b11e5 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#25 0x00007fe7000a57e3 in ?? () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#26 0x00007fe71266d90d in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion const&, KWin::WindowPaintData&) () from /lib/x86_64-linux-gnu/libkwin.so.5
#27 0x00007fe7126f9f35 in KWin::Scene::paintWindow(KWin::Scene::Window*, int, QRegion const&, KWin::WindowQuadList const&) () from /lib/x86_64-linux-gnu/libkwin.so.5
#28 0x00007fe7126f74bf in KWin::Scene::paintSimpleScreen(int, QRegion const&) () from /lib/x86_64-linux-gnu/libkwin.so.5
#29 0x00007fe7126f4a96 in KWin::Scene::finalPaintScreen(int, QRegion const&, KWin::ScreenPaintData&) () from /lib/x86_64-linux-gnu/libkwin.so.5
#30 0x00007fe7126f9240 in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, KWin::RenderLoop*, QMatrix4x4 const&) () from /lib/x86_64-linux-gnu/libkwin.so.5
#31 0x00007fe7000ac78c in KWin::SceneOpenGL::paint(int, QRegion const&, QList<KWin::Toplevel*> const&, KWin::RenderLoop*) () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#32 0x00007fe7126317e8 in KWin::Compositor::composite(KWin::RenderLoop*) () from /lib/x86_64-linux-gnu/libkwin.so.5
#33 0x00007fe712631be7 in KWin::X11Compositor::composite(KWin::RenderLoop*) () from /lib/x86_64-linux-gnu/libkwin.so.5
#34 0x00007fe7112f96fe in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#35 0x00007fe7125e7f06 in KWin::RenderLoop::frameRequested(KWin::RenderLoop*) () from /lib/x86_64-linux-gnu/libkwin.so.5
#36 0x00007fe7126e68c7 in KWin::RenderLoopPrivate::dispatch() () from /lib/x86_64-linux-gnu/libkwin.so.5
#37 0x00007fe7112f96fe in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#38 0x00007fe7112fe22e in QTimer::timeout(QTimer::QPrivateSignal) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#39 0x00007fe7112f0195 in QObject::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#40 0x00007fe711dc3dc3 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#41 0x00007fe711dccbb8 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#42 0x00007fe7112c26da in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#43 0x00007fe71131c330 in QTimerInfoList::activateTimers() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#44 0x00007fe71131a6f7 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#45 0x00007fe70ad83132 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#46 0x00007fe7112c11eb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#47 0x00007fe7112c9394 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#48 0x000055612df7ea6d in main (argc=<optimized out>, argv=0x7ffc83342de8) at ./src/main_x11.cpp:479

Thread 7 (Thread 0x7fe6e4ab4700 (LWP 1320)):
#0  0x00007fe710cb1bf6 in __ppoll (fds=0x7fe6c4000d98, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007fe711318ef9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007fe71131a5a3 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007fe7112c11eb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe7110dba52 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe7110dcbec in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fe7027fc700 (LWP 1212)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55612f1653e8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55612f165398, cond=0x55612f1653c0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55612f1653c0, mutex=0x55612f165398) at pthread_cond_wait.c:647
#3  0x00007fe708965e6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fe708965a6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fe702ffd700 (LWP 1211)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55612f1653e8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55612f165398, cond=0x55612f1653c0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55612f1653c0, mutex=0x55612f165398) at pthread_cond_wait.c:647
#3  0x00007fe708965e6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fe708965a6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fe7037fe700 (LWP 1210)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55612f1653e8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55612f165398, cond=0x55612f1653c0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55612f1653c0, mutex=0x55612f165398) at pthread_cond_wait.c:647
#3  0x00007fe708965e6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fe708965a6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fe703fff700 (LWP 1209)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55612f1653e8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55612f165398, cond=0x55612f1653c0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x55612f1653c0, mutex=0x55612f165398) at pthread_cond_wait.c:647
#3  0x00007fe708965e6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#4  0x00007fe708965a6b in ?? () from /usr/lib/x86_64-linux-gnu/dri/i965_dri.so
#5  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fe7013e5700 (LWP 1215)):
#0  futex_abstimed_wait_cancelable (private=<optimized out>, abstime=0x7fe7013e4c50, clockid=<optimized out>, expected=0, futex_word=0x55612f1c3b50) at ../sysdeps/nptl/futex-internal.h:320
#1  __pthread_cond_wait_common (abstime=0x7fe7013e4c50, clockid=<optimized out>, mutex=0x55612f1c3b00, cond=0x55612f1c3b28) at pthread_cond_wait.c:520
#2  __pthread_cond_timedwait (cond=0x55612f1c3b28, mutex=0x55612f1c3b00, abstime=0x7fe7013e4c50) at pthread_cond_wait.c:665
#3  0x00007fe7110e2ce8 in QWaitCondition::wait(QMutex*, QDeadlineTimer) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007fe7110e01f1 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007fe7110dcbec in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fe6e77bf700 (LWP 1300)):
[KCrash Handler]
#3  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#4  0x00007fe710bc1859 in __GI_abort () at abort.c:79
#5  0x00007fe7110a1bf7 in QMessageLogger::fatal(char const*, ...) const () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007fe70815eeab in KWin::X11StandalonePlatform::<lambda()>::operator() (__closure=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qlogging.h:90
#7  QtPrivate::FunctorCall<QtPrivate::IndexesList<>, QtPrivate::List<>, void, KWin::X11StandalonePlatform::createOpenGLSafePoint(KWin::Platform::OpenGLSafePoint)::<lambda()> >::call (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:146
#8  QtPrivate::Functor<KWin::X11StandalonePlatform::createOpenGLSafePoint(KWin::Platform::OpenGLSafePoint)::<lambda()>, 0>::call<QtPrivate::List<>, void> (arg=<optimized out>, f=...) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:256
#9  QtPrivate::QFunctorSlotObject<KWin::X11StandalonePlatform::createOpenGLSafePoint(KWin::Platform::OpenGLSafePoint)::<lambda()>, 0, QtPrivate::List<>, void>::impl(int, QtPrivate::QSlotObjectBase *, QObject *, void **, bool *) (which=<optimized out>, this_=<optimized out>, r=<optimized out>, a=<optimized out>, ret=<optimized out>) at /usr/include/x86_64-linux-gnu/qt5/QtCore/qobjectdefs_impl.h:443
#10 0x00007fe7112f96fe in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007fe7112fe22e in QTimer::timeout(QTimer::QPrivateSignal) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007fe7112f0195 in QObject::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007fe711dc3dc3 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007fe711dccbb8 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#15 0x00007fe7112c26da in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00007fe71131c330 in QTimerInfoList::activateTimers() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007fe71131a6f7 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007fe7112c11eb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x00007fe7110dba52 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007fe7110dcbec in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007fe70f7d7609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#22 0x00007fe710cbe293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Possible duplicates by query: bug 429344, bug 427384, bug 424911, bug 423222, bug 423132.

Reported using DrKonqi