SUMMARY On Fedora 37 KDE with KDE 5.26 packages from the @kdesig/kde COPR repo, Kwin (Wayland) crashes when attempting to screen share / use OBS. This is with Intel HD 620 graphics. The error message in the log shows: Oct 16 19:09:08 fedora-t580 kwin_wayland_wrapper[4491]: No provider of eglQueryDmaBufModifiersEXT found. Requires one of: Oct 16 19:09:08 fedora-t580 kwin_wayland_wrapper[4491]: EGL_EXT_image_dma_buf_import_modifiers STEPS TO REPRODUCE 1. Be on Fedora 37 KDE with Intel HD 620 graphics (or maybe similar) 2. Use KDE 5.26 on Fedora 37 3. Try to screen share / record screen in OBS 4. Notice Kwin Wayland instantly crashes OBSERVED RESULT kwin_wayland crashes EXPECTED RESULT For it to not crash. It works fine in KDE 5.25.5 SOFTWARE/OS VERSIONS Operating System: Fedora Linux 37 KDE Plasma Version: 5.26.0 KDE Frameworks Version: 5.98.0 Qt Version: 5.15.6 Kernel Version: 5.19.15-301.fc37.x86_64 (64-bit) Graphics Platform: Wayland Processors: 4 × Intel® Core™ i5-7300U CPU @ 2.60GHz Memory: 7.6 GiB of RAM Graphics Processor: Mesa Intel® HD Graphics 620 Manufacturer: LENOVO System Version: ThinkPad T580 ADDITIONAL INFORMATION This is different from https://bugs.kde.org/show_bug.cgi?id=460553 , the crash appears to be for a different reason.
due to corrupt kwinrc
I found the cause. It's caused by an aurorae theme ( https://store.kde.org/p/1887668 ) and I don't think it's specific to just that theme. If I set that aurorae theme, and reboot, I get crashing when I try to screen share, in Wayland. If I set it back to Breeze, and reboot, screen sharing works normally.
For crashes we need a backtrace Please see https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports#Retrieving_a_backtrace_using_coredumpctl and try to obtain a backtrace for kwin_wayland
(In reply to Nicolas Fella from comment #3) > For crashes we need a backtrace > > Please see > https://community.kde.org/Guidelines_and_HOWTOs/Debugging/ > How_to_create_useful_crash_reports#Retrieving_a_backtrace_using_coredumpctl > and try to obtain a backtrace for kwin_wayland (gdb) bt #0 0x00007f29b06d3ccc in __pthread_kill_implementation () from /lib64/libc.so.6 #1 0x00007f29b0683aa6 in raise () from /lib64/libc.so.6 #2 0x00007f29b066d7fc in abort () from /lib64/libc.so.6 #3 0x00007f29b0b084d5 in QMessageLogger::fatal(char const*, ...) const () from /lib64/libQt5Core.so.5 #4 0x00007f29b19d141b in QGuiApplicationPrivate::createPlatformIntegration() () from /lib64/libQt5Gui.so.5 #5 0x00007f29b19d18c8 in QGuiApplicationPrivate::createEventDispatcher() () from /lib64/libQt5Gui.so.5 #6 0x00007f29b0d05ab1 in QCoreApplicationPrivate::init() () from /lib64/libQt5Core.so.5 #7 0x00007f29b19d3c83 in QGuiApplicationPrivate::init() () from /lib64/libQt5Gui.so.5 #8 0x00007f29b260b31d in QApplicationPrivate::init() () from /lib64/libQt5Widgets.so.5 #9 0x000055e92c3efd23 in main (argc=<optimized out>, argv=<optimized out>) at /usr/src/debug/xdg-desktop-portal-kde-5.26.0-1.fc37.x86_64/src/xdg-desktop-portal-kde.cpp:25 Hope this helps.
I encountered this error too with nvidia card. It does not happens if I switch to intel igpu. Below is the stacktrace of kwin_wayland. 0 __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:44 #1 __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78 #2 __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ./nptl/pthread_kill.c:89 #3 0x00007f14c5e3bc46 in __GI_raise (sig=sig@entry=6) at ../sysdeps/posix/raise.c:26 #4 0x00007f14c5e227fc in __GI_abort () at ./stdlib/abort.c:79 #5 0x00007f14c7d8bcaa in () at /lib/x86_64-linux-gnu/libepoxy.so.0 #6 0x00007f14c7d8bcf0 in () at /lib/x86_64-linux-gnu/libepoxy.so.0 #7 0x00007f14c7d8dd62 in () at /lib/x86_64-linux-gnu/libepoxy.so.0 #8 0x0000564066424099 in KWin::querySupportedModifiers (format=875713089, eglDisplay=0x5640669a7220) at /home/aki/kde/src/kwin/src/plugins/screencast/screencaststream.cpp:323 #9 KWin::ScreenCastStream::createStream() (this=this@entry=0x564066ba5a50) at /home/aki/kde/src/kwin/src/plugins/screencast/screencaststream.cpp:344 #10 0x00005640664247b8 in KWin::ScreenCastStream::init() (this=this@entry=0x564066ba5a50) at /home/aki/kde/src/kwin/src/plugins/screencast/screencaststream.cpp:295 #11 0x000056406641ca40 in KWin::ScreencastManager::integrateStreams(KWaylandServer::ScreencastStreamV1Interface*, KWin::ScreenCastStream*) (this=<optimized out>, waylandStream=0x564067230e60, stream=0x564066ba5a50) at /home/aki/kde/src/kwin/src/plugins/screencast/screencastmanager.cpp:201 #12 0x000056406641cc74 in KWin::ScreencastManager::streamOutput(KWaylandServer::ScreencastStreamV1Interface*, KWin::Output*, KWaylandServer::ScreencastV1Interface::CursorMode) (this=<optimized out>, waylandStream=<optimized out>, streamOutput=<optimized out>, mode=<optimized out>) at /home/aki/kde/src/kwin/src/plugins/screencast/screencastmanager.cpp:148 #13 0x000056406641cdab in KWin::ScreencastManager::streamVirtualOutput(KWaylandServer::ScreencastStreamV1Interface*, QString const&, QSize const&, double, KWaylandServer::ScreencastV1Interface::CursorMode) (this=<optimized out>, stream=0x564067230e60, name=<optimized out>, size=<optimized out>, scale=<optimized out>, mode=KWaylandServer::ScreencastV1Interface::Metadata) at /home/aki/kde/src/kwin/src/plugins/screencast/screencastmanager.cpp:114 #14 0x00007f14c70f36ff in () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #15 0x00007f14c8b9da7f in KWaylandServer::ScreencastV1Interface::virtualOutputScreencastRequested(KWaylandServer::ScreencastStreamV1Interface*, QString const&, QSize const&, double, KWaylandServer::ScreencastV1Interface::CursorMode) (this=this@entry=0x564066b55bc0, _t1=<optimized out>, _t1@entry=0x564067230e60, _t2=..., _t3=..., _t4=<optimized out>, _t4@entry=1, _t5=<optimized out>, _t5@entry=KWaylandServer::ScreencastV1Interface::Metadata) at /home/aki/kde/build/kwin/src/kwin_autogen/IEXH3JLKNG/moc_screencast_v1_interface.cpp:342 #16 0x00007f14c8e402b4 in KWaylandServer::ScreencastV1InterfacePrivate::zkde_screencast_unstable_v1_stream_virtual_output(QtWaylandServer::zkde_screencast_unstable_v1::Resource*, unsigned int, QString const&, int, int, int, unsigned int) (this=<optimized out>, resource=0x5640670a2870, streamid=32, name=..., width=<optimized out>, height=<optimized out>, scale=256, pointer=4) at /home/aki/kde/src/kwin/src/wayland/screencast_v1_interface.cpp:88 #17 0x00007f14c8eec85a in QtWaylandServer::zkde_screencast_unstable_v1::handle_stream_virtual_output(wl_client*, wl_resource*, unsigned int, char const*, int, int, int, unsigned int) (client=<optimized out>, resource=<optimized out>, stream=32, name=0x5640670a4570 "fake", width=1920, height=1080, scale=256, pointer=4) --Type <RET> for more, q to quit, c to continue without paging-- awn/kde/build/kwin/src/wayland/qwayland-server-zkde-screencast-unstable-v1.cpp:298 #18 0x00007f14c42e8e2e in () at /lib/x86_64-linux-gnu/libffi.so.8 #19 0x00007f14c42e5493 in () at /lib/x86_64-linux-gnu/libffi.so.8 #20 0x00007f14c5a442a0 in () at /lib/x86_64-linux-gnu/libwayland-server.so.0 #21 0x00007f14c5a48694 in () at /lib/x86_64-linux-gnu/libwayland-server.so.0 #22 0x00007f14c5a470fa in wl_event_loop_dispatch () at /lib/x86_64-linux-gnu/libwayland-server.so.0 #23 0x00007f14c8e16109 in KWaylandServer::Display::dispatchEvents() (this=<optimized out>) at /home/aki/kde/src/kwin/src/wayland/display.cpp:114 #24 0x00007f14c70f36ff in () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #25 0x00007f14c70f6b83 in QSocketNotifier::activated(QSocketDescriptor, QSocketNotifier::Type, QSocketNotifier::QPrivateSignal) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #26 0x00007f14c70f73b5 in QSocketNotifier::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #27 0x00007f14c676bf32 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5 #28 0x00007f14c70bae38 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #29 0x00007f14c7111e2b in QEventDispatcherUNIXPrivate::activateSocketNotifiers() () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #30 0x00007f14c7112317 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #31 0x00005640664e42f1 in QUnixEventDispatcherQPA::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () #32 0x00007f14c70b97cb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #33 0x00007f14c70c1c2a in QCoreApplication::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5 #34 0x00005640663f2b94 in main(int, char**) (argc=<optimized out>, argv=<optimized out>) at /home/aki/kde/src/kwin/src/main_wayland.cpp:613
https://invent.kde.org/plasma/kwin/-/merge_requests/3077 should fix it
Git commit 84635c71ec3b0b66e0276fedf0625e232fa07809 by Xaver Hugl. Committed on 02/11/2022 at 16:10. Pushed by zamundaaa into branch 'master'. plugins/screencast: centralize format querying into the RenderBackend M +7 -0 src/core/renderbackend.cpp M +2 -0 src/core/renderbackend.h M +8 -0 src/platformsupport/scenes/opengl/abstract_egl_backend.cpp M +1 -0 src/platformsupport/scenes/opengl/abstract_egl_backend.h M +15 -6 src/platformsupport/scenes/opengl/egl_dmabuf.cpp M +4 -5 src/platformsupport/scenes/opengl/egl_dmabuf.h M +2 -18 src/plugins/screencast/screencaststream.cpp https://invent.kde.org/plasma/kwin/commit/84635c71ec3b0b66e0276fedf0625e232fa07809
Git commit 4dada2819334c93a42db160af3d489fa6375abc7 by Xaver Hugl. Committed on 02/11/2022 at 17:50. Pushed by zamundaaa into branch 'Plasma/5.26'. plugins/screencast: centralize format querying into the RenderBackend (cherry picked from commit 84635c71ec3b0b66e0276fedf0625e232fa07809) M +7 -0 src/core/renderbackend.cpp M +2 -0 src/core/renderbackend.h M +8 -0 src/platformsupport/scenes/opengl/abstract_egl_backend.cpp M +1 -0 src/platformsupport/scenes/opengl/abstract_egl_backend.h M +16 -7 src/platformsupport/scenes/opengl/egl_dmabuf.cpp M +4 -5 src/platformsupport/scenes/opengl/egl_dmabuf.h M +2 -18 src/plugins/screencast/screencaststream.cpp https://invent.kde.org/plasma/kwin/commit/4dada2819334c93a42db160af3d489fa6375abc7