Bug 2222127

Description of problem:
This crash happens every time I allow my system to lock after remaining inactive. It occurs after the screens go to sleep, which causes one of the attached displays (that likely has a hardware issue) to completely disable connection to the system. This, in turn, is detected by the system as though the display was disconnected and reconnected. Could something like this this be causing a race condition within kwin?

Version-Release number of selected component:
kwin-wayland-5.27.6-1.fc38

Additional info:
reporter:       libreport-2.17.11
type:           CCpp
reason:         kwin_wayland killed by SIGSEGV
journald_cursor: s=b19570e628384ff1b43a6a93e8de68ae;i=1f8134;b=02910b9999094217a5f90897768a2ae4;m=91824769f;t=5ff79393e3552;x=92bd49dc79f19dcc
executable:     /usr/bin/kwin_wayland
cgroup:         0::/user.slice/user-1000.slice/user/session.slice/plasma-kwin_wayland.service
rootdir:        /
uid:            1000
kernel:         6.3.8-200.fc38.x86_64
package:        kwin-wayland-5.27.6-1.fc38
runlevel:       N 5
backtrace_rating: 4
crash_function: KWin::DrmGammaRamp::DrmGammaRamp(KWin::DrmCrtc*, std::shared_ptr<KWin::ColorTransformation> const&)
comment:        This crash happens every time I allow my system to lock after remaining inactive. It occurs after the screens go to sleep, which causes one of the attached displays (that likely has a hardware issue) to completely disable connection to the system. This, in turn, is detected by the system as though the display was disconnected and reconnected. Could something like this this be causing a race condition within kwin?
cmdline:        /usr/bin/kwin_wayland --wayland-fd 7 --socket wayland-0 --xwayland-fd 8 --xwayland-fd 9 --xwayland-display :0 --xwayland-xauthority /run/user/1000/xauth_LAYTre --xwayland

Truncated backtrace:
Thread no. 1 (42 frames)
 #0 KWin::DrmGammaRamp::DrmGammaRamp(KWin::DrmCrtc*, std::shared_ptr<KWin::ColorTransformation> const&) at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/backends/drm/drm_pipeline.cpp:594
 #1 std::_Construct<KWin::DrmGammaRamp, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&>(KWin::DrmGammaRamp*, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&) at /usr/include/c++/13/bits/stl_construct.h:109
 #2 std::allocator_traits<std::allocator<void> >::construct<KWin::DrmGammaRamp, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&>(std::allocator<void>&, KWin::DrmGammaRamp*, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&) at /usr/include/c++/13/bits/alloc_traits.h:660
 #3 std::_Sp_counted_ptr_inplace<KWin::DrmGammaRamp, std::allocator<void>, (__gnu_cxx::_Lock_policy)2>::_Sp_counted_ptr_inplace<KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&>(std::allocator<void>, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&) at /usr/include/c++/13/bits/shared_ptr_base.h:604
 #4 std::__shared_count<(__gnu_cxx::_Lock_policy)2>::__shared_count<KWin::DrmGammaRamp, std::allocator<void>, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&>(KWin::DrmGammaRamp*&, std::_Sp_alloc_shared_tag<std::allocator<void> >, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&) at /usr/include/c++/13/bits/shared_ptr_base.h:971
 #5 std::__shared_ptr<KWin::DrmGammaRamp, (__gnu_cxx::_Lock_policy)2>::__shared_ptr<std::allocator<void>, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&>(std::_Sp_alloc_shared_tag<std::allocator<void> >, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&) at /usr/include/c++/13/bits/shared_ptr_base.h:1712
 #6 std::shared_ptr<KWin::DrmGammaRamp>::shared_ptr<std::allocator<void>, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&>(std::_Sp_alloc_shared_tag<std::allocator<void> >, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&) at /usr/include/c++/13/bits/shared_ptr.h:464
 #7 std::make_shared<KWin::DrmGammaRamp, KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&>(KWin::DrmCrtc*&, std::shared_ptr<KWin::ColorTransformation> const&) at /usr/include/c++/13/bits/shared_ptr.h:1010
 #8 KWin::DrmPipeline::setGammaRamp(std::shared_ptr<KWin::ColorTransformation> const&) at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/backends/drm/drm_pipeline.cpp:782
 #9 KWin::DrmOutput::setGammaRamp(std::shared_ptr<KWin::ColorTransformation> const&) at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/backends/drm/drm_output.cpp:472
 #10 KWin::ColorDevice::update() at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/colors/colordevice.cpp:321
 #11 QtPrivate::QSlotObjectBase::call(QObject*, void**) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
 #12 doActivate<false>(QObject*, int, void**) at kernel/qobject.cpp:3925
 #13 KWin::Output::setState(KWin::Output::State const&) at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/core/output.cpp:292
 #14 KWin::DrmOutput::updateDpmsMode(KWin::Output::DpmsMode) at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/backends/drm/drm_output.cpp:353
 #15 KWin::DrmOutput::setDrmDpmsMode(KWin::Output::DpmsMode) at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/backends/drm/drm_output.cpp:276
 #16 KWin::DrmOutput::setDpmsMode(KWin::Output::DpmsMode) at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/backends/drm/drm_output.cpp:255
 #17 KWin::DrmBackend::turnOutputsOn() at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/backends/drm/drm_backend.cpp:114
 #18 KWin::DrmOutput::applyQueuedChanges(KWin::OutputConfiguration const&) at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/backends/drm/drm_output.cpp:453
 #20 KWin::DrmBackend::applyOutputChanges(KWin::OutputConfiguration const&) at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/backends/drm/drm_backend.cpp:496
 #21 KWin::Workspace::updateOutputConfiguration() at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/workspace.cpp:557
 #22 KWin::Workspace::slotOutputBackendOutputsQueried() at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/workspace.cpp:1325
 #23 QtPrivate::QSlotObjectBase::call(QObject*, void**) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
 #24 doActivate<false>(QObject*, int, void**) at kernel/qobject.cpp:3925
 #25 KWin::DrmBackend::updateOutputs() at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/backends/drm/drm_backend.cpp:329
 #26 KWin::DrmBackend::handleUdevEvent() at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/backends/drm/drm_backend.cpp:265
 #27 QtPrivate::QSlotObjectBase::call(QObject*, void**) at ../../include/QtCore/../../src/corelib/kernel/qobjectdefs_impl.h:398
 #28 doActivate<false>(QObject*, int, void**) at kernel/qobject.cpp:3925
 #29 QMetaObject::activate(QObject*, QMetaObject const*, int, void**) at kernel/qobject.cpp:3985
 #30 QSocketNotifier::activated(QSocketDescriptor, QSocketNotifier::Type, QSocketNotifier::QPrivateSignal) at .moc/moc_qsocketnotifier.cpp:178
 #31 QSocketNotifier::event(QEvent*) at kernel/qsocketnotifier.cpp:302
 #32 QApplicationPrivate::notify_helper(QObject*, QEvent*) at kernel/qapplication.cpp:3640
 #33 QCoreApplication::notifyInternal2(QObject*, QEvent*) at kernel/qcoreapplication.cpp:1064
 #34 QCoreApplication::sendEvent(QObject*, QEvent*) at kernel/qcoreapplication.cpp:1462
 #35 QEventDispatcherUNIXPrivate::activateSocketNotifiers() at kernel/qeventdispatcher_unix.cpp:304
 #36 QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) at kernel/qeventdispatcher_unix.cpp:511
 #37 QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
 #38 QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) at ../../include/QtCore/../../src/corelib/global/qflags.h:69
 #39 QCoreApplication::exec() at ../../include/QtCore/../../src/corelib/global/qflags.h:121
 #40 QGuiApplication::exec() at kernel/qguiapplication.cpp:1863
 #41 QApplication::exec() at kernel/qapplication.cpp:2832
 #42 main(int, char**) at /usr/src/debug/kwin-5.27.6-1.fc38.x86_64/src/main_wayland.cpp:628