Tested using neon-devedition-gitunstable-20180121-0806-amd64.iso 1. Open KScreen and disable one output. 2. Apply 3. Enable output and place it where you want (if you dont't place and only enable it works) 4. Apply 5. All outputs are working for ~1 sec and then whole session crashes
Created attachment 110038 [details] Screenshot - disabled output
Created attachment 110039 [details] Screenshot - before click Apply
I just tried to reproduce, but failed. Could you please try attaching gdb to kwin in order to get a backtrace?
I am sorry for misleading, this is not kwin fail but plasmashell. Sometimes additionaly kdeinit, policykit-kde-agent-1 and some other services crashes.
Created attachment 110244 [details] plasmashell-20180131-004131.kcrash.txt
Please state Qt version
Qt 5.9.3 (running fresh installed neon-devedition-gitstable-20180130-0526-amd64)
pasting backtrace inline may even be something in qtwayland as the crash is into qscreen internals? Thread 1 (Thread 0x7fa2d9ff48c0 (LWP 3424)): [KCrash Handler] #6 QScreen::availableGeometry (this=0x0) at kernel/qscreen.cpp:391 #7 0x00007fa2d482167c in QScreen::availableVirtualGeometry (this=this@entry=0x1220f20) at kernel/qscreen.cpp:476 #8 0x00007fa2d7c20d65 in QQuickScreenInfo::setWrappedScreen (this=this@entry=0x1993970, screen=0x120fe40) at items/qquickscreen.cpp:342 #9 0x00007fa2d7c212e5 in QQuickScreenAttached::screenChanged (this=0x1993970, screen=<optimized out>) at items/qquickscreen.cpp:439 #10 0x00007fa2d3fa8279 in QMetaObject::activate (sender=sender@entry=0x14fc990, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe2bbd1690) at kernel/qobject.cpp:3766 #11 0x00007fa2d3fa8b87 in QMetaObject::activate (sender=sender@entry=0x14fc990, m=m@entry=0x7fa2d4dfc440 <QWindow::staticMetaObject>, local_signal_index=local_signal_index@entry=0, argv=argv@entry=0x7ffe2bbd1690) at kernel/qobject.cpp:3628 #12 0x00007fa2d47fab9f in QWindow::screenChanged (this=this@entry=0x14fc990, _t1=_t1@entry=0x120fe40) at .moc/moc_qwindow.cpp:658 #13 0x00007fa2d47fb343 in QWindowPrivate::emitScreenChangedRecursion (this=this@entry=0x159c5e0, newScreen=newScreen@entry=0x120fe40) at kernel/qwindow.cpp:400 #14 0x00007fa2d48029ae in QWindowPrivate::setTopLevelScreen (this=0x159c5e0, newScreen=0x120fe40, recreate=recreate@entry=false) at kernel/qwindow.cpp:424 #15 0x00007fa2d47f3b79 in QGuiApplicationPrivate::processWindowScreenChangedEvent (wse=0x19d00f0) at kernel/qguiapplication.cpp:2203 #16 0x00007fa2d47f8805 in QGuiApplicationPrivate::processWindowSystemEvent (e=e@entry=0x19d00f0) at kernel/qguiapplication.cpp:1760 #17 0x00007fa2d47d281b in QWindowSystemInterface::sendWindowSystemEvents (flags=...) at kernel/qwindowsysteminterface.cpp:939 #18 0x00007fa2c5685570 in userEventSourceDispatch(_GSource*, int (*)(void*), void*) () from /usr/lib/x86_64-linux-gnu/libQt5WaylandClient.so.5 #19 0x00007fa2ce56d197 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #20 0x00007fa2ce56d3f0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #21 0x00007fa2ce56d49c in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #22 0x00007fa2d3fd16af in QEventDispatcherGlib::processEvents (this=0x127e490, flags=...) at kernel/qeventdispatcher_glib.cpp:423 #23 0x00007fa2c564eb94 in QtWaylandClient::QWaylandDisplay::forceRoundTrip (this=this@entry=0x12031e0) at qwaylanddisplay.cpp:364 #24 0x00007fa2c564f3ee in QtWaylandClient::QWaylandDisplay::registry_global (this=0x12031e0, id=37, interface=..., version=2) at qwaylanddisplay.cpp:251 #25 0x00007fa2c567447e in QtWayland::wl_registry::handle_global (data=0x12031f0, object=<optimized out>, name=37, interface=0x7fa218081500 "wl_output", version=2) at qwayland-wayland.cpp:74 #26 0x00007fa2ce118e40 in ffi_call_unix64 () at ../src/x86/unix64.S:76 #27 0x00007fa2ce1188ab in ffi_call (cif=cif@entry=0x7ffe2bbd1c50, fn=<optimized out>, rvalue=rvalue@entry=0x0, avalue=avalue@entry=0x7ffe2bbd1d20) at ../src/x86/ffi64.c:525 #28 0x00007fa2d28059de in wl_closure_invoke (closure=closure@entry=0x7fa218081420, flags=flags@entry=1, target=target@entry=0x11ff980, opcode=opcode@entry=0, data=0x12031f0) at ../src/connection.c:935 #29 0x00007fa2d2802650 in dispatch_event (display=display@entry=0x11f12d0, queue=0x11f1398) at ../src/wayland-client.c:1310 #30 0x00007fa2d28038ac in dispatch_queue (queue=0x11f1398, display=0x11f12d0) at ../src/wayland-client.c:1456 #31 wl_display_dispatch_queue_pending (display=0x11f12d0, queue=0x11f1398) at ../src/wayland-client.c:1698 #32 0x00007fa2d28038fc in wl_display_dispatch_pending (display=<optimized out>) at ../src/wayland-client.c:1761 #33 0x00007fa2c564e962 in QtWaylandClient::QWaylandDisplay::flushRequests (this=0x12031e0) at qwaylanddisplay.cpp:190 #34 0x00007fa2d3fa8279 in QMetaObject::activate (sender=sender@entry=0x127e490, signalOffset=<optimized out>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3766 #35 0x00007fa2d3fa8b87 in QMetaObject::activate (sender=sender@entry=0x127e490, m=m@entry=0x7fa2d4432420 <QAbstractEventDispatcher::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0x0) at kernel/qobject.cpp:3628 #36 0x00007fa2d3f78173 in QAbstractEventDispatcher::awake (this=this@entry=0x127e490) at .moc/moc_qabstracteventdispatcher.cpp:144 #37 0x00007fa2d3fd16ee in QEventDispatcherGlib::processEvents (this=0x127e490, flags=...) at kernel/qeventdispatcher_glib.cpp:430 #38 0x00007fa2d3f79e2a in QEventLoop::exec (this=this@entry=0x7ffe2bbd2080, flags=..., flags@entry=...) at kernel/qeventloop.cpp:212 #39 0x00007fa2d3f82d64 in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1291 #40 0x000000000041cd99 in main (argc=1, argv=<optimized out>) at /workspace/build/shell/main.cpp:166
Thanks for the report, Kamil. I've been using Wayland on my laptop and have an external monitor connected. I've not experienced these crashes. Can you please test and confirm if this issue is still occurring or if this bug report can be marked as resolved. I've set the bug status to "needsinfo" pending your response, please change back to "reported" or "resolved" when you respond, thanks.
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!