Bug 385051

Summary:	kwin crash on alt+tab switching
Product:	[Plasma] kwin	Reporter:	Lari Karam <lari.karam>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED UPSTREAM
Severity:	crash	Keywords:	drkonqi
Priority:	NOR
Version First Reported In:	5.10.5
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Lari Karam 2017-09-25 12:00:27 UTC

Application: kwin_x11 (5.10.5)

Qt Version: 5.9.1
Frameworks Version: 5.33.0
Operating System: Linux 4.10.13-1-default x86_64
Distribution: "openSUSE Tumbleweed"

-- Information about the crash:
- What I was doing when the application crashed:
browsing the web, watching video, listening to spotify web player...
if I would switch widows, it would crash on alt+tab

The crash can be reproduced every time.

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f2a87ec5900 (LWP 8426))]

Thread 13 (Thread 0x7f2a3a20e700 (LWP 8455)):
#0  0x00007f2a80a779a6 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2a83dc88e4 in  () at /usr/lib64/libQt5Script.so.5
#2  0x00007f2a83dc8929 in  () at /usr/lib64/libQt5Script.so.5
#3  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 12 (Thread 0x7f2a4f45e700 (LWP 8452)):
#0  0x00007f2a8784f8ab in ppoll () at /lib64/libc.so.6
#1  0x00007f2a84e73649 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f2a84e74c26 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f2a84e2035a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f2a84c5031a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#5  0x00007f2a7f560705 in  () at /usr/lib64/libQt5Qml.so.5
#6  0x00007f2a84c54d2e in  () at /usr/lib64/libQt5Core.so.5
#7  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 11 (Thread 0x7f2a50e9c700 (LWP 8451)):
#0  0x00007f2a80a779a6 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2a64a883ab in  () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f2a64a88227 in  () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 10 (Thread 0x7f2a5169d700 (LWP 8450)):
#0  0x00007f2a80a779a6 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2a64a883ab in  () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f2a64a88227 in  () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 9 (Thread 0x7f2a51e9e700 (LWP 8449)):
#0  0x00007f2a80a779a6 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2a64a883ab in  () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f2a64a88227 in  () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 8 (Thread 0x7f2a5269f700 (LWP 8448)):
#0  0x00007f2a80a779a6 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2a64a883ab in  () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f2a64a88227 in  () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 7 (Thread 0x7f2a52ea0700 (LWP 8447)):
#0  0x00007f2a80a779a6 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2a64a883ab in  () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f2a64a88227 in  () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 6 (Thread 0x7f2a536a1700 (LWP 8446)):
#0  0x00007f2a80a779a6 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2a64a883ab in  () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f2a64a88227 in  () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 5 (Thread 0x7f2a53ea2700 (LWP 8445)):
#0  0x00007f2a80a779a6 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2a64a883ab in  () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f2a64a88227 in  () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 4 (Thread 0x7f2a546a3700 (LWP 8444)):
#0  0x00007f2a80a779a6 in pthread_cond_wait@@GLIBC_2.3.2 () at /lib64/libpthread.so.0
#1  0x00007f2a64a883ab in  () at /usr/lib64/dri/swrast_dri.so
#2  0x00007f2a64a88227 in  () at /usr/lib64/dri/swrast_dri.so
#3  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#4  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 3 (Thread 0x7f2a6cbeb700 (LWP 8431)):
#0  0x00007f2a8784f8ab in ppoll () at /lib64/libc.so.6
#1  0x00007f2a84e73649 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () at /usr/lib64/libQt5Core.so.5
#2  0x00007f2a84e74c26 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#3  0x00007f2a84e2035a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#4  0x00007f2a84c5031a in QThread::exec() () at /usr/lib64/libQt5Core.so.5
#5  0x00007f2a7e72da45 in  () at /usr/lib64/libQt5DBus.so.5
#6  0x00007f2a84c54d2e in  () at /usr/lib64/libQt5Core.so.5
#7  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#8  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 2 (Thread 0x7f2a6ed2a700 (LWP 8429)):
#0  0x00007f2a8784f7bd in poll () at /lib64/libc.so.6
#1  0x00007f2a869723e0 in  () at /usr/lib64/libxcb.so.1
#2  0x00007f2a86974179 in xcb_wait_for_event () at /usr/lib64/libxcb.so.1
#3  0x00007f2a6fe0a4b9 in  () at /usr/lib64/libQt5XcbQpa.so.5
#4  0x00007f2a84c54d2e in  () at /usr/lib64/libQt5Core.so.5
#5  0x00007f2a80a71537 in start_thread () at /lib64/libpthread.so.0
#6  0x00007f2a8785904f in clone () at /lib64/libc.so.6

Thread 1 (Thread 0x7f2a87ec5900 (LWP 8426)):
[KCrash Handler]
#6  0x00007f2a64aa71a0 in  () at /usr/lib64/dri/swrast_dri.so
#7  0x00007f2a64a86a70 in  () at /usr/lib64/dri/swrast_dri.so
#8  0x00007f2a645852f3 in  () at /usr/lib64/dri/swrast_dri.so
#9  0x00007f2a645490f8 in  () at /usr/lib64/dri/swrast_dri.so
#10 0x00007f2a6454986f in  () at /usr/lib64/dri/swrast_dri.so
#11 0x00007f2a7fc14d47 in QSGBatchRenderer::Renderer::renderMergedBatch(QSGBatchRenderer::Batch const*) () at /usr/lib64/libQt5Quick.so.5
#12 0x00007f2a7fc15f45 in QSGBatchRenderer::Renderer::renderBatches() () at /usr/lib64/libQt5Quick.so.5
#13 0x00007f2a7fc1b3ec in QSGBatchRenderer::Renderer::render() () at /usr/lib64/libQt5Quick.so.5
#14 0x00007f2a7fc0c41a in QSGRenderer::renderScene(QSGBindable const&) () at /usr/lib64/libQt5Quick.so.5
#15 0x00007f2a7fc0c8ab in QSGRenderer::renderScene(unsigned int) () at /usr/lib64/libQt5Quick.so.5
#16 0x00007f2a7fc453f0 in QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at /usr/lib64/libQt5Quick.so.5
#17 0x00007f2a7fc9e098 in QQuickWindowPrivate::renderSceneGraph(QSize const&) () at /usr/lib64/libQt5Quick.so.5
#18 0x00007f2a7fc37f94 in  () at /usr/lib64/libQt5Quick.so.5
#19 0x00007f2a7fca7bee in QQuickWindow::event(QEvent*) () at /usr/lib64/libQt5Quick.so.5
#20 0x00007f29b480ef63 in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib64/libKF5PlasmaQuick.so.5
#21 0x00007f2a85ba69bc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#22 0x00007f2a85badd74 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#23 0x00007f2a84e21d48 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#24 0x00007f2a853f7e91 in QWindowPrivate::deliverUpdateRequest() () at /usr/lib64/libQt5Gui.so.5
#25 0x00007f2a853f8349 in QWindow::event(QEvent*) () at /usr/lib64/libQt5Gui.so.5
#26 0x00007f2a7fca7ba5 in QQuickWindow::event(QEvent*) () at /usr/lib64/libQt5Quick.so.5
#27 0x00007f29b480ef63 in PlasmaQuick::Dialog::event(QEvent*) () at /usr/lib64/libKF5PlasmaQuick.so.5
#28 0x00007f2a85ba69bc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#29 0x00007f2a85badd74 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/libQt5Widgets.so.5
#30 0x00007f2a84e21d48 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/libQt5Core.so.5
#31 0x00007f2a84e76c3e in QTimerInfoList::activateTimers() () at /usr/lib64/libQt5Core.so.5
#32 0x00007f2a84e74e92 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#33 0x00007f2a6fe6a0ed in  () at /usr/lib64/libQt5XcbQpa.so.5
#34 0x00007f2a84e2035a in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib64/libQt5Core.so.5
#35 0x00007f2a84e28be4 in QCoreApplication::exec() () at /usr/lib64/libQt5Core.so.5
#36 0x00007f2a87b1a5a6 in kdemain () at /usr/lib64/libkdeinit5_kwin_x11.so
#37 0x00007f2a8778c541 in __libc_start_main () at /lib64/libc.so.6
#38 0x00005564b4d2986a in _start ()

Reported using DrKonqi

Comment 1 Martin Flöser 2017-09-25 15:11:32 UTC

Crash happens in OpenGL driver. Please note that you use swrast which means software emulation. It looks like the driver is not installed. Best check your installation.