DESCRIPTION I have a second monitor connected to my laptop through HDMI. I have NVIDIA GeForce RTX 5070 Max-Q Mobile Discrete graphics card with nvidia-open driver package. My CPU is Intel Core i5-14450HX. When i updated to Plasma 6.7, when i opened some programs/games in full screen on my second monitor, my KWin crashed. I was able to reproduce the error using firefox and game "Buckshot roulette" from Steam. KWin doesn't crash if i open window in full screen on my main (laptop) monitor. I use a wayland session and am using standard "Breeze" theme with dark mode and no official/unnoficial widgets on either of my screens. STEPS TO REPRODUCE 1. Connect a second monitor 2. Open firefox and drag it onto a second monitor 3. Press F11 OBSERVED RESULT Screen goes black. Then it shows one or multiple messages that KWin had just crashed. I still have mouse and KRunner, from where i can open Konsole. EXPECTED RESULT Program/game opens full-screen. SOFTWARE/OS VERSIONS Operating System (available in the Info Center app, or by running `kinfo` in a terminal window): KDE Plasma Version: 6.7.0 KDE Frameworks Version: 6.27.0 Qt Version: 6.11.1 ADDITIONAL INFORMATION Backtrace: [Thread debugging using libthread_db enabled] Using host libthread_db library "/usr/lib/libthread_db.so.1". Core was generated by `/usr/bin/kwin_wayland --wayland-fd 7 --socket wayland-0 --xwayland-fd 8 --xwayland-fd 9 --xwayland-display :1 --xwayland-xauthority /run/user/1000/xauth_MieFyR --xwayland'. Program terminated with signal SIGSEGV, Segmentation fault. #0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=11, no_tid=no_tid@entry=0) at pthread_kill.c:44 44 return INTERNAL_SYSCALL_ERROR_P (ret) ? INTERNAL_SYSCALL_ERRNO (ret) : 0; [Current thread is 1 (Thread 0x7f2b2e0fa180 (LWP 23826))] (gdb) bt full #0 __pthread_kill_implementation (threadid=<optimized out>, signo=signo@entry=11, no_tid=no_tid@entry=0) at pthread_kill.c:44 tid = <optimized out> ret = 0 pd = <optimized out> old_mask = {__val = {0}} ret = <optimized out> #1 0x00007f2b34c9a363 in __pthread_kill_internal (threadid=<optimized out>, signo=11) at pthread_kill.c:89 No locals. #2 0x00007f2b34c3e7d0 in __GI_raise (sig=11) at ../sysdeps/posix/raise.c:26 ret = <optimized out> #3 0x00007f2b38a1e01d in KCrash::defaultCrashHandler (sig=11) at /usr/src/debug/kcrash/kcrash-6.27.0/src/kcrash.cpp:630 data = {<KCrash::MetadataWriter> = {_vptr.MetadataWriter = 0x7f2b38a23848 <vtable for KCrash::Metadata+16>}, argv = {_M_elems = {0x0, 0x7f2b38a2142a "--qtversion", 0x55d2eaae3db0 "6.11.1", 0x7f2b38a2143d "--kdeframeworksversion", 0x7f2b38a21436 "6.27.0", 0x7f2b38a21475 "--platform", 0x7f2b38a2146d "wayland", 0x7f2b38a214a6 "--appname", 0x55d2eaae3e90 "kwin_wayland", 0x7f2b38a214b0 "--apppath", 0x55d2eaae3f30 "/usr/bin", 0x7f2b38a214bd "--signal", 0x7fff584fc056 "11", 0x7f2b38a214cb "--pid", 0x7fff584fc060 "23826", 0x7f2b38a214d1 "--appversion", 0x55d2eaae2e50 "6.7.0", 0x7f2b38a214de "--programname", 0x55d2eaae2be0 "KWin", 0x7f2b38a214ec "--bugaddress", 0x55d2eaae05f0 "submit@bugs.kde.org", 0x0 <repeats 17 times>}}, argc = 21, m_writer = 0x7fff584fc000} platformName = {d = {d = 0x55d2ec5a0870, ptr = 0x55d2ec5a0880 "wayland-org.kde.kwin.qpa", size = 24}, static _empty = 0 '\000'} about = 0x55d2eaacebb0 argv = 0x7fff584fc088 i = <optimized out> ini = {<KCrash::MetadataWriter> = {_vptr.MetadataWriter = 0x7f2b38a23878 <vtable for KCrash::MetadataINIWriter+16>}, writable = false, fd = 198} sigtxt = "11\000\000\000\000\000\340\220@" pidtxt = "23826\000\000\000\000\000\000\000\000\000\200?\000\000\000" argc = <optimized out> crashRecursionCounter = 2 #4 <signal handler called> No locals. #5 KWin::RenderDevice::drmDevice (this=0x0) at /usr/include/c++/16.1.1/bits/unique_ptr.h:192 No locals. #6 0x00007f2b3851c38d in KWin::EglGbmLayer::importScanoutBuffer (this=this@entry=0x55d2eb8a4330, buffer=0x55d2ec686860, frame=std::shared_ptr<KWin::OutputFrame> (use count 1, weak count 0) = {...}) at /usr/src/debug/kwin/kwin-6.7.0/src/backends/drm/drm_egl_layer.cpp:104 directScanoutDisabled = false #7 0x00007f2b381a5920 in KWin::prepareDirectScanout (view=<optimized out>, logicalOutput=<optimized out>, backendOutput=<optimized out>, frame=...) at /usr/src/debug/kwin/kwin-6.7.0/src/compositor.cpp:391 layer = 0x55d2eb8a4330 candidate = 0x55d2eab47b50 buffer = <optimized out> attrs = <optimized out> tearing = <optimized out> formats = {<QHash<unsigned int, KWin::ModifierList>> = {d = 0x55d2eacadb30}, <No data fields>} ret = <optimized out> #8 KWin::Compositor::setupLayers (this=this@entry=0x55d2ead99210, sceneView=sceneView@entry=0x55d2eba2b280, logicalOutput=<optimized out>, backendOutput=<optimized out>, outputLayers=..., assignments=..., frame=..., type=<optimized out>, toUpdate=...) at /usr/src/debug/kwin/kwin-6.7.0/src/compositor.cpp:642 layer = <optimized out> __for_range = @0x7fff584fd0d0: {<QListSpecialMethods<KWin::Compositor::LayerData>> = {<QListSpecialMethodsBase<KWin::Compositor::LayerData>> = {<No data fields>}, <No data fields>}, d = {d = 0x55d2ec688540, ptr = 0x55d2ec688550, size = 1}} __for_begin = <optimized out> __for_end = <optimized out> unusedOutputLayers = {<QListSpecialMethods<KWin::OutputLayer*>> = {<QListSpecialMethodsBase<KWin::OutputLayer*>> = {<No data fields>}, <No data fields>}, d = {d = 0x55d2ec54b9e0, ptr = <optimized out>, size = <optimized out>}} layers = {<QListSpecialMethods<KWin::Compositor::LayerData>> = {<QListSpecialMethodsBase<KWin::Compositor::LayerData>> = {<No data fields>}, <No data fields>}, d = {d = 0x55d2ec688540, ptr = 0x55d2ec688550, size = 1}} sortedLayers = <optimized out> underlay = <optimized out> #9 0x00007f2b381a7a47 in KWin::Compositor::composite (this=<optimized out>, renderLoop=<optimized out>) at /usr/src/debug/kwin/kwin-6.7.0/src/compositor.cpp:776 scene = <optimized out> output = 0x55d2eacbc700 logicalOutput = 0x55d2eba0ff60 primaryView = <optimized out> _duration = std::unique_ptr<KWin::FTraceDuration> = {get() = 0x0} totalTimeQuery = <optimized out> frame = std::shared_ptr<KWin::OutputFrame> (use count 1, weak count 0) = {get() = 0x55d2ec0f7970} desiredArtificalHdrHeadroom = std::optional [no contained value] maxDimChange = <optimized out> maxUndimChange = <optimized out> activeWindow = <optimized out> activeFullscreenItem = <optimized out> wantsAdaptiveSync = <optimized out> vrr = <optimized out> tearing = <optimized out> unusedOutputLayers = {<QListSpecialMethods<KWin::OutputLayer*>> = {<QListSpecialMethodsBase<KWin::OutputLayer*>> = {<No data fields>}, <No data fields>}, d = {d = 0x55d2ec6fb210, ptr = 0x55d2ec6fb220, size = 3}} overlaysAllowed = <optimized out> allowedOutputLayers = {<QListSpecialMethods<KWin::OutputLayer*>> = {<QListSpecialMethodsBase<KWin::OutputLayer*>> = {<No data fields>}, <No data fields>}, d = {d = 0x55d2ec783ac0, ptr = 0x55d2ec783ad0, size = 2}} layerCandidates = {<QListSpecialMethods<KWin::Item*>> = {<QListSpecialMethodsBase<KWin::Item*>> = {<No data fields>}, <No data fields>}, d = {d = 0x55d2ec7916b0, ptr = 0x55d2ec7916c0, size = 1}} idealLayerAssignments = std::optional containing std::unordered_map with 1 element = {[0x55d2eb8a4330] = 0x55d2eab47b50} scenePlusCursor = {<QListSpecialMethods<KWin::Item*>> = {<QListSpecialMethodsBase<KWin::Item*>> = {<No data fields>}, <No data fields>}, d = {d = 0x55d2ec68c7c0, ptr = 0x55d2ec68c7d0, size = 1}} sceneOnly = {<QListSpecialMethods<KWin::Item*>> = {<QListSpecialMethodsBase<KWin::Item*>> = {<No data fields>}, <No data fields>}, d = {d = 0x55d2ec57c440, ptr = 0x55d2ec57c450, size = 1}} --Type <RET> for more, q to quit, c to continue without paging-- toUpdate = std::unordered_set with 1 element = {[0] = 0x55d2eb8a4690} layers = <optimized out> result = <optimized out> renderLayers = {__layers = @0x55d2ebbb82d0, __toUpdate = std::unordered_set with 49 elements = {[0] = 0x55d2ebbbfa20, [1] = 0x7f2b3818c680 <KWin::RootItem::qt_metacast(char const*)>, [2] = 0xff097400387f8348<error reading variable: Cannot access memory at address 0x87f8b48fa1e0ff3>...}, __result = @0x7fff584fd440, __logicalOutput = @0x7f2b386694cd, __output = @0x55d2ec57c440, __frame = <error reading variable: Cannot access memory at address 0x31450f75012883f8>} forceRepaintForBrightness = <optimized out> forceRepaintForDimming = <optimized out> forceRepaintForOffscreenAnimations = <optimized out> #10 0x00007f2b355f081b in QtPrivate::QSlotObjectBase::call (this=<optimized out>, r=<optimized out>, a=<optimized out>, this=<optimized out>, r=<optimized out>, a=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobjectdefs_impl.h:462 No locals. #11 doActivate<false> (sender=0x55d2eac6b0b0, signal_index=5, argv=0x7fff584fd620) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobject.cpp:4372 obj = {m_slotObject = std::unique_ptr<QtPrivate::QSlotObjectBase> = {get() = 0x55d2ec288920}} td = <optimized out> receiverInSameThread = <optimized out> receiver = <optimized out> senderData = {previous = 0x0, receiver = 0x55d2ead99210, sender = 0x55d2eac6b0b0, signal = 5} lock = <optimized out> c = 0x55d2ebfbb960 connections = {<QSharedDataPointerBase<QExplicitlySharedDataPointer, QObjectPrivate::ConnectionData>> = {d = {ptr = 0x55d2ebc10c30}}, <No data fields>} list = 0x55d2ebc10cd0 inSenderThread = <optimized out> highestConnectionId = 3 signalVector = 0x55d2ebc10c60 currentThreadId = 0x7f2b2e0fa180 sp = <optimized out> signal_spy_set = 0x0 empty_argv = {0x0} senderDeleted = false #12 0x00007f2b381ff17b in QMetaObject::activate<void, KWin::RenderLoop*> (sender=<optimized out>, mo=<optimized out>, local_signal_index=2, ret=0x0) at /usr/include/qt6/QtCore/qobjectdefs.h:320 _a = {0x0, 0x7fff584fd618} #13 KWin::RenderLoop::frameRequested (this=<optimized out>, _t1=<optimized out>) at /usr/src/debug/kwin/build/src/kwin_autogen/include/moc_renderloop.cpp:171 No locals. #14 0x00007f2b355e7cf9 in QObject::event (this=<optimized out>, e=<optimized out>) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qobject.cpp:1454 __PRETTY_FUNCTION__ = <optimized out> #15 0x00007f2b3690411f in QApplicationPrivate::notify_helper (this=<optimized out>, receiver=0x55d2eac6b0b0, e=0x7fff584fd7c0) at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:3276 consumed = false filtered = false threadData = <optimized out> #16 0x00007f2b35583658 in QCoreApplication::notifyInternal2 (receiver=0x55d2eac6b0b0, event=0x7fff584fd7c0) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1114 d = <optimized out> threadData = 0x55d2ea959ee0 selfRequired = <optimized out> result = false cbdata = {0x55d2eac6b0b0, 0x7fff584fd7c0, 0x7fff584fd73f} scopeLevelCounter = {threadData = 0x55d2ea959ee0} #17 0x00007f2b3576b2f5 in QCoreApplication::sendEvent (receiver=<optimized out>, event=0x7fff584fd7c0) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1559 No locals. #18 QTimerInfoList::activateTimers (this=0x55d2eaa15568) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qtimerinfo_unix.cpp:427 e = {<QEvent> = {_vptr.QEvent = 0x7f2b35a84b50 <vtable for QTimerEvent+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 0x7f2b35932728 <QEvent::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN6QEventE_t>+1512>, data = 0x7f2b35932140 <QEvent::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN6QEventE_t>>, static_metacall = 0x0, relatedMetaObjects = 0x0, metaTypes = 0x7f2b35a84cf0 <QEvent::qt_staticMetaObjectRelocatingContent<(anonymous namespace)::qt_meta_tag_ZN6QEventE_t>>, extradata = 0x0}}, t = 1, m_posted = false, m_spont = false, m_accept = true, m_unused = false, m_reserved = 0, m_inputEvent = 0, m_pointerEvent = 0, m_singlePointEvent = 0}, m_id = (unknown: 0x6700000a)} currentTimerInfo = 0x0 now = <optimized out> stillActive = {__now = <synthetic pointer>Python Exception <class 'gdb.error'>: value has been optimized out } it = <optimized out> maxCount = 0 n_act = <optimized out> #19 0x00007f2b35776bd2 in QEventDispatcherUNIXPrivate::activateTimers (this=0x55d2eaa15490) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_unix.cpp:222 No locals. #20 QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=..., flags@entry=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventdispatcher_unix.cpp:504 d = 0x55d2eaa15490 --Type <RET> for more, q to quit, c to continue without paging--c threadData = <optimized out> include_timers = <optimized out> include_notifiers = <optimized out> wait_for_events = <optimized out> canWait = <optimized out> deadline = <optimized out> nevents = 1 #21 0x00007f2b36583543 in QUnixEventDispatcherQPA::processEvents (this=<optimized out>, flags=...) at /usr/src/debug/qt6-base/qtbase/src/gui/platform/unix/qunixeventdispatcher.cpp:28 didSendEvents = <optimized out> #22 0x00007f2b35591983 in QEventLoop::processEvents (this=0x7fff584fd9a0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:109 d = <optimized out> threadData = <optimized out> #23 QEventLoop::exec (this=0x7fff584fd9a0, flags=...) at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qeventloop.cpp:198 d = 0x55d2ebe41fd0 threadData = <optimized out> locker = {m_mutex = 0x55d2ea95b658, m_isLocked = false} ref = <optimized out> app = <optimized out> #24 0x00007f2b35586eaa in QCoreApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/corelib/kernel/qcoreapplication.cpp:1457 threadData = 0x55d2ea959ee0 eventLoop = {<QObject> = {_vptr.QObject = 0x7f2b35a7fc08 <vtable for QEventLoop+16>, static staticMetaObject = {d = {superdata = {direct = 0x0}, stringdata = 0x7f2b3592ddb0 <_ZN7QObject32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_125qt_meta_tag_ZN7QObjectE_tEEE.lto_priv.0+272>, data = 0x7f2b3592dca0 <_ZN7QObject32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_125qt_meta_tag_ZN7QObjectE_tEEE.lto_priv.0>, static_metacall = 0x7f2b355f0ff0 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7f2b35a829e0 <_ZN7QObject36qt_staticMetaObjectRelocatingContentIN12_GLOBAL__N_125qt_meta_tag_ZN7QObjectE_tEEE.lto_priv.0>, extradata = 0x0}}, d_ptr = {d = 0x55d2ebe41fd0}}, static staticMetaObject = {d = { superdata = {direct = 0x7f2b35a82a80 <QObject::staticMetaObject>}, stringdata = 0x7f2b358edd6c <_ZN10QEventLoop32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_129qt_meta_tag_ZN10QEventLoopE_tEEE.lto_priv.0+236>, data = 0x7f2b358edc80 <_ZN10QEventLoop32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_129qt_meta_tag_ZN10QEventLoopE_tEEE.lto_priv.0>, static_metacall = 0x7f2b3558af60 <QEventLoop::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7f2b35a823e0 <_ZN10QEventLoop36qt_staticMetaObjectRelocatingContentIN12_GLOBAL__N_129qt_meta_tag_ZN10QEventLoopE_tEEE.lto_priv.0>, extradata = 0x0}}} returnCode = <optimized out> #25 0x00007f2b3690033a in QApplication::exec () at /usr/src/debug/qt6-base/qtbase/src/widgets/kernel/qapplication.cpp:2546 No locals. #26 0x000055d2d6c1e040 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/kwin/kwin-6.7.0/src/main_wayland.cpp:660 environment = {d = {<QSharedDataPointerBase<QSharedDataPointer, QProcessEnvironmentPrivate>> = {d = {ptr = 0x55d2ea9c2620}}, <No data fields>}} a = {<KWin::Application> = {<QApplication> = {<QGuiApplication> = {<QCoreApplication> = {<QObject> = {_vptr.QObject = 0x55d2d6d2d4e8 <vtable for KWin::ApplicationWayland+16>, static staticMetaObject = {d = {superdata = { direct = 0x0}, stringdata = 0x7f2b3592ddb0 <_ZN7QObject32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_125qt_meta_tag_ZN7QObjectE_tEEE.lto_priv.0+272>, data = 0x7f2b3592dca0 <_ZN7QObject32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_125qt_meta_tag_ZN7QObjectE_tEEE.lto_priv.0>, static_metacall = 0x7f2b355f0ff0 <QObject::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7f2b35a829e0 <_ZN7QObject36qt_staticMetaObjectRelocatingContentIN12_GLOBAL__N_125qt_meta_tag_ZN7QObjectE_tEEE.lto_priv.0>, extradata = 0x0}}, d_ptr = {d = 0x55d2ea93a030}}, static staticMetaObject = {d = {superdata = {direct = 0x7f2b35a82a80 <QObject::staticMetaObject>}, stringdata = 0x7f2b358ee048 <_ZN16QCoreApplication32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_135qt_meta_tag_ZN16QCoreApplicationE_tEEE.lto_priv.0+392>, data = 0x7f2b358edec0 <_ZN16QCoreApplication32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_135qt_meta_tag_ZN16QCoreApplicationE_tEEE.lto_priv.0>, static_metacall = 0x7f2b3558edc0 <QCoreApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7f2b35a82460 <_ZN16QCoreApplication36qt_staticMetaObjectRelocatingContentIN12_GLOBAL__N_135qt_meta_tag_ZN16QCoreApplicationE_tEEE.lto_priv.0>, extradata = 0x0}}, static self = 0x7fff584fde90}, static staticMetaObject = {d = {superdata = {direct = 0x7f2b35a824e0 <QCoreApplication::staticMetaObject>}, stringdata = 0x7f2b3662c78c <_ZN15QGuiApplication32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_134qt_meta_tag_ZN15QGuiApplicationE_tEEE.lto_priv.0+780>, data = 0x7f2b3662c480 <_ZN15QGuiApplication32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_134qt_meta_tag_ZN15QGuiApplicationE_tEEE.lto_priv.0>, static_metacall = 0x7f2b35fc4e70 <QGuiApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7f2b367414a0 <_ZN15QGuiApplication36qt_staticMetaObjectRelocatingContentIN12_GLOBAL__N_134qt_meta_tag_ZN15QGuiApplicationE_tEEE.lto_priv.0>, extradata = 0x0}}}, static staticMetaObject = {d = { superdata = {direct = 0x7f2b36741ea0 <QGuiApplication::staticMetaObject>}, stringdata = 0x7f2b36e147a8 <_ZN12QApplication32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_131qt_meta_tag_ZN12QApplicationE_tEEE.lto_priv.0+392>, data = 0x7f2b36e14620 <_ZN12QApplication32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_131qt_meta_tag_ZN12QApplicationE_tEEE.lto_priv.0>, static_metacall = 0x7f2b36909f40 <QApplication::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7f2b36f632c0 <_ZN12QApplication36qt_staticMetaObjectRelocatingContentIN12_GLOBAL__N_131qt_meta_tag_ZN12QApplicationE_tEEE.lto_priv.0>, extradata = 0x0}}}, static staticMetaObject = {d = {superdata = { direct = 0x7f2b36f72360 <QApplication::staticMetaObject>}, stringdata = 0x7f2b387b6fb8 <_ZN4KWin11Application32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_135qt_meta_tag_ZN4KWin11ApplicationE_tEEE.lto_priv.0+280>, data = 0x7f2b387b6ea0 <_ZN4KWin11Application32qt_staticMetaObjectStaticContentIN12_GLOBAL__N_135qt_meta_tag_ZN4KWin11ApplicationE_tEEE.lto_priv.0>, static_metacall = 0x7f2b382fb9b0 <KWin::Application::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x7f2b388f5a20 <_ZN4KWin11Application36qt_staticMetaObjectRelocatingContentIN12_GLOBAL__N_135qt_meta_tag_ZN4KWin11ApplicationE_tEEE.lto_priv.0>, extradata = 0x0}}, static crashes = 0, m_eventFilters = {<QListSpecialMethods<QPointer<KWin::X11EventFilterContainer> >> = {<QListSpecialMethodsBase<QPointer<KWin::X11EventFilterContainer> >> = {<No data fields>}, <No data fields>}, d = {d = 0x55d2ec261b20, ptr = 0x55d2ec261b30, size = 4}}, m_genericEventFilters = {<QListSpecialMethods<QPointer<KWin::X11EventFilterContainer> >> = {<QListSpecialMethodsBase<QPointer<KWin::X11EventFilterContainer> >> = {<No data fields>}, <No data fields>}, d = {d = 0x0, ptr = 0x0, size = 0}}, m_scene = std::unique_ptr<KWin::WorkspaceScene> = {get() = 0x55d2ebbc7cc0}, m_followLocale1 = false, m_configLock = false, m_initiallyLocked = false, m_supportsLockScreen = true, m_supportsGlobalShortcuts = true, m_config = {<QSharedDataPointerBase<QExplicitlySharedDataPointer, KSharedConfig>> = {d = {ptr = 0x55d2eaacca50}}, <No data fields>}, m_kxkbConfig = {<QSharedDataPointerBase<QExplicitlySharedDataPointer, KSharedConfig>> = {d = {ptr = 0x55d2eaba38c0}}, <No data fields>}, m_inputConfig = {<QSharedDataPointerBase<QExplicitlySharedDataPointer, KSharedConfig>> = {d = {ptr = 0x55d2eaba3de0}}, <No data fields>}, m_kdeglobals = {<QSharedDataPointerBase<QExplicitlySharedDataPointer, KSharedConfig>> = {d = {ptr = 0x55d2eaacf4e0}}, <No data fields>}, m_rootWindow = 1028, m_connection = 0x55d2ec2ca2d0, m_useKActivities = true, m_session = std::unique_ptr<KWin::Session> = {get() = 0x55d2eab9d120}, m_outputBackend = std::unique_ptr<KWin::OutputBackend> = {get() = 0x55d2eab43750}, m_terminating = false, m_xwaylandScale = std::optional = { [contained value] = 1}, m_processEnvironment = {d = {<QSharedDataPointerBase<QSharedDataPointer, QProcessEnvironmentPrivate>> = {d = {ptr = 0x55d2ebe434b0}}, <No data fields>}}, m_pluginManager = std::unique_ptr<KWin::PluginManager> = {get() = 0x55d2ebbc5fb0}, m_inputMethod = std::unique_ptr<KWin::InputMethod> = {get() = 0x55d2eae213b0}, m_tabletModeManager = std::unique_ptr<KWin::TabletModeManager> = {get() = 0x55d2eae6f600}, m_gpuManager = std::unique_ptr<KWin::GpuManager> = {get() = 0x0}}, static staticMetaObject = {d = {superdata = { direct = 0x7f2b388f5f40 <KWin::Application::staticMetaObject>}, stringdata = 0x55d2d6cf779c <KWin::ApplicationWayland::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN4KWin18ApplicationWaylandE_t>+60>, data = 0x55d2d6cf7760 <KWin::ApplicationWayland::qt_staticMetaObjectStaticContent<(anonymous namespace)::qt_meta_tag_ZN4KWin18ApplicationWaylandE_t>>, static_metacall = 0x55d2d6c22770 <KWin::ApplicationWayland::qt_static_metacall(QObject*, QMetaObject::Call, int, void**)>, relatedMetaObjects = 0x0, metaTypes = 0x55d2d6d2b840 <KWin::ApplicationWayland::qt_staticMetaObjectRelocatingContent<(anonymous namespace)::qt_meta_tag_ZN4KWin18ApplicationWaylandE_t>>, extradata = 0x0}}, m_applicationsToStart = {<QListSpecialMethods<QString>> = {<QListSpecialMethodsBase<QString>> = {<No data fields>}, <No data fields>}, d = {d = 0x0, ptr = 0x0, size = 0}}, m_inputMethodServerToStart = {d = {d = 0x0, ptr = 0x0, size = 0}, static _empty = 0 u'\000'}, m_sessionArgument = {d = {d = 0x0, ptr = 0x0, size = 0}, static _empty = 0 u'\000'}, m_startXWayland = true, m_xwayland = std::unique_ptr<KWin::Xwl::Xwayland> = { get() = 0x55d2ebe3ffe0}, m_xwaylandListenFds = {<QListSpecialMethods<int>> = {<QListSpecialMethodsBase<int>> = {<No data fields>}, <No data fields>}, d = {d = 0x55d2eaba37a0, ptr = 0x55d2eaba37b0, size = 2}}, m_xwaylandDisplay = {d = {d = 0x55d2eaae40e0, ptr = 0x55d2eaae40f0 u":1", size = 2}, static _empty = 0 u'\000'}, m_xwaylandXauthority = {d = {d = 0x55d2eaad3600, ptr = 0x55d2eaad3610 u"/run/user/1000/xauth_MieFyR", size = 27}, static _empty = 0 u'\000'}, m_xwaylandExtraEnvironment = {d = {d = {ptr = 0x55d2ebba2d00}}}, m_xwaylandFds = std::vector of length 1, capacity 1 = {{m_fd = -1}}, m_settingsWatcher = {value = { ptr = 0x55d2ea9c7560}, d = 0x55d2eaabf5a0}} xwaylandOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4690}}, <No data fields>}} waylandSocketOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4710}}, <No data fields>}} x11DisplayOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4790}}, <No data fields>}} waylandDisplayOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4810}}, <No data fields>}} virtualFbOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4890}}, <No data fields>}} widthOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4960}}, <No data fields>}} heightOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4a30}}, <No data fields>}} fullscreenOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4b00}}, <No data fields>}} scaleOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4bd0}}, <No data fields>}} outputCountOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4c50}}, <No data fields>}} waylandSocketFdOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4d20}}, <No data fields>}} xwaylandListenFdOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae4ee0}}, <No data fields>}} xwaylandDisplayOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae5000}}, <No data fields>}} xwaylandXAuthorityOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae5080}}, <No data fields>}} replaceOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae5150}}, <No data fields>}} drmOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae5270}}, <No data fields>}} locale1Option = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae52f0}}, <No data fields>}} parser = {d = 0x55d2eaa148e0} inputMethodOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae6340}}, <No data fields>}} screenLockerOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae63c0}}, <No data fields>}} noScreenLockerOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae64e0}}, <No data fields>}} noGlobalShortcutsOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaae66d0}}, <No data fields>}} noActivitiesOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaaed270}}, <No data fields>}} exitWithSessionOption = {d = {<QSharedDataPointerBase<QSharedDataPointer, QCommandLineOptionPrivate>> = {d = {ptr = 0x55d2eaaed450}}, <No data fields>}} backendType = <optimized out> initialWindowSize = <optimized out> outputCount = 1 outputScale = <optimized out> ok = true width = <optimized out> height = <optimized out> scale = <optimized out> fullscreen = false count = <optimized out> server = <optimized out> socketName = {d = {d = 0x55d2eaae44e0, ptr = 0x55d2eaae44f0 u"wayland-0", size = 9}, static _empty = 0 u'\000'} BackendType::Kms = BackendType::Kms BackendType::X11 = BackendType::X11 BackendType::Wayland = BackendType::Wayland BackendType::Virtual = BackendType::Virtual
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/9456
Please attach the output of journalctl --user-unit plasma-kwin_wayland --boot 0 (from when the external monitor is connected) Do you have any environment variables set regarding Nvidia or DRI_PRIME?
Git commit a9c0ccda4f24a9f6d690b62279e985be1b522ca4 by Vlad Zahorodnii, on behalf of Xaver Hugl. Committed on 23/06/2026 at 06:25. Pushed by vladz into branch 'master'. backends/drm: check for the render device in importScanoutBuffer While it shouldn't be nullptr, it seems like it can still happen in some configurations. M +1 -1 src/backends/drm/drm_egl_layer.cpp https://invent.kde.org/plasma/kwin/-/commit/a9c0ccda4f24a9f6d690b62279e985be1b522ca4
Git commit b69b7d2cc688f64dd8425b2c1bd3b45ba96a8dbf by Vlad Zahorodnii, on behalf of Xaver Hugl. Committed on 23/06/2026 at 07:01. Pushed by vladz into branch 'Plasma/6.7'. backends/drm: check for the render device in importScanoutBuffer While it shouldn't be nullptr, it seems like it can still happen in some configurations. (cherry picked from commit a9c0ccda4f24a9f6d690b62279e985be1b522ca4) M +1 -1 src/backends/drm/drm_egl_layer.cpp https://invent.kde.org/plasma/kwin/-/commit/b69b7d2cc688f64dd8425b2c1bd3b45ba96a8dbf