https://bugs.kde.org/show_bug.cgi?id=438789
Bug ID: 438789
Summary: kwin_wayland crashed in KWin::DrmGpu::updateOutputs
while un/re-plugging monitor
Product: kwin
Version: 5.22.0
Platform: openSUSE RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-drm
Assignee: kwin-bugs-n...@kde.org
Reporter: jirisl...@gmail.com
Target Milestone: ---
SUMMARY
When I unplugged and replugged an external monitor the following crash
occurred. I don't know if the unplug or replug caused this as I did it both in
one second or so.
> #0 qDeleteAll<KWin::DrmConnector* const*>(KWin::DrmConnector* const*,
> KWin::DrmConnector* const*) (end=0x558831b810d0, begin=0x558831b810c8) at
> /usr/include/qt5/QtCore/qalgorithms.h:320
> #1 qDeleteAll<QVector<KWin::DrmConnector*> >(QVector<KWin::DrmConnector*>
> const&) (c=<optimized out>, c=...) at
> /usr/include/qt5/QtCore/qalgorithms.h:328
> #2 KWin::DrmGpu::updateOutputs() [clone .isra.0] (this=<optimized out>) at
> /usr/src/debug/kwin5-5.22.0-2.1.x86_64/src/plugins/platforms/drm/drm_gpu.cpp:308
> #3 0x00007f3f56df8c2e in KWin::DrmBackend::updateOutputs()
> (this=0x5588308190a0) at
> /usr/src/debug/kwin5-5.22.0-2.1.x86_64/src/plugins/platforms/drm/drm_backend.cpp:328
> #4 KWin::DrmBackend::updateOutputs() (this=this@entry=0x5588308190a0) at
> /usr/src/debug/kwin5-5.22.0-2.1.x86_64/src/plugins/platforms/drm/drm_backend.cpp:320
> #5 0x00007f3f56df9a1b in KWin::DrmBackend::handleUdevEvent()
> (this=0x5588308190a0) at
> /usr/src/debug/kwin5-5.22.0-2.1.x86_64/src/plugins/platforms/drm/drm_backend.cpp:230
> #6 0x00007f3f5d3f40f3 in QtPrivate::QSlotObjectBase::call(QObject*, void**)
> (a=0x7fff5456c7b0, r=0x5588308190a0, this=0x55883083ca90) at
> ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
> #7 doActivate<false>(QObject*, int, void**) (sender=0x558830839290,
> signal_index=3, argv=0x7fff5456c7b0) at kernel/qobject.cpp:3886
> #8 0x00007f3f5d3ed5bf in QMetaObject::activate(QObject*, QMetaObject const*,
> int, void**) (sender=sender@entry=0x558830839290, m=m@entry=0x7f3f5d6a0aa0,
> local_signal_index=local_signal_index@entry=0,
> argv=argv@entry=0x7fff5456c7b0) at kernel/qobject.cpp:3946
> #9 0x00007f3f5d3f74bf in QSocketNotifier::activated(QSocketDescriptor,
> QSocketNotifier::Type, QSocketNotifier::QPrivateSignal)
> (this=this@entry=0x558830839290, _t1=..., _t2=<optimized out>, _t3=...) at
> .moc/moc_qsocketnotifier.cpp:178
> #10 0x00007f3f5d3f7cbb in QSocketNotifier::event(QEvent*)
> (this=0x558830839290, e=0x7fff5456c8d0) at kernel/qsocketnotifier.cpp:302
> #11 0x00007f3f5e2cda5f in QApplicationPrivate::notify_helper(QObject*,
> QEvent*) (this=<optimized out>, receiver=0x558830839290, e=0x7fff5456c8d0) at
> kernel/qapplication.cpp:3632
> #12 0x00007f3f5d3bdaaa in QCoreApplication::notifyInternal2(QObject*,
> QEvent*) (receiver=0x558830839290, event=0x7fff5456c8d0) at
> kernel/qcoreapplication.cpp:1063
> #13 0x00007f3f5d4124ab in
> QEventDispatcherUNIXPrivate::activateSocketNotifiers() (this=0x5588307c3a10)
> at kernel/qeventdispatcher_unix.cpp:304
> #14 0x00007f3f5d41290b in
> QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
> (this=<optimized out>, flags=...) at kernel/qeventdispatcher_unix.cpp:511
> #15 0x000055882f39339d in
> QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
> (this=<optimized out>, flags=...) at qunixeventdispatcher.cpp:63
> #16 0x00007f3f5d3bc4bb in
> QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>)
> (this=this@entry=0x7fff5456ca60, flags=..., flags@entry=...) at
> ../../include/QtCore/../../src/corelib/global/qflags.h:69
> #17 0x00007f3f5d3c4790 in QCoreApplication::exec() () at
> ../../include/QtCore/../../src/corelib/global/qflags.h:121
> #18 0x000055882f33626a in main(int, char**) (argc=<optimized out>,
> argv=<optimized out>) at
> /usr/src/debug/kwin5-5.22.0-2.1.x86_64/src/main_wayland.cpp:727
> (gdb) fram 2
> #2 KWin::DrmGpu::updateOutputs() [clone .isra.0] (this=<optimized out>) at
> /usr/src/debug/kwin5-5.22.0-2.1.x86_64/src/plugins/platforms/drm/drm_gpu.cpp:308
> 308 qDeleteAll(oldConnectors);
> (gdb) l
> 303
> 304 for(DrmOutput *removedOutput : removedOutputs) {
> 305 removeOutput(removedOutput);
> 306 }
> 307
> 308 qDeleteAll(oldConnectors);
> 309 qDeleteAll(oldCrtcs);
> 310 return true;
> 311 }
> 312
STEPS TO REPRODUCE
1. Unplug thunderbolt (behind which a monitor is connected)
2. Replug thunderbolt
3. boom
SOFTWARE/OS VERSIONS
Operating System: openSUSE Tumbleweed 20210614
KDE Plasma Version: 5.22.0
KDE Frameworks Version: 5.82.0
Qt Version: 5.15.2
Kernel Version: 5.12.10-3.g332b26c-default (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Core™ i7-6600U CPU @ 2.60GHz
Memory: 15.1 GiB of RAM
Graphics Processor: Mesa DRI Intel® HD Graphics 520
ADDITIONAL INFORMATION
Running in wayland.
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