Created attachment 133471 [details] crash.txt SUMMARY Ctrl + Alt + F-key results in a black screen and a Kwin error on returning to ctrl + alt + F1. Operating System: Kubuntu 20.10 KDE Plasma Version: 5.19.5 KDE Frameworks Version: 5.74.0 Qt Version: 5.14.2 Kernel Version: 5.8.0-29-generic OS Type: 64-bit Processors: 8 × Intel® Core™ i7-3770 CPU @ 3.40GHz Memory: 15,6 GiB of RAM Graphics Processor: GeForce GTX 680MX/PCIe/SSE2
#4 0x00007f93e83d6941 in ?? () from /lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1 #5 0x00007f93e83d6a09 in ?? () from /lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1 #6 0x00007f93e83d86ba in ?? () from /lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1 #7 0x00007f93e83d8f81 in ?? () from /lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1 #8 0x00007f93e9e38eb5 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion const&, KWin::WindowPaintData&) () from /lib/x86_64-linux-gnu/libkwin.so.5 #9 0x00007f93e834a5e5 in ?? () from /lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1 #10 0x00007f93e9e38eb5 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion const&, KWin::WindowPaintData&) () from /lib/x86_64-linux-gnu/libkwin.so.5 #11 0x00007f93e9e38eb5 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion const&, KWin::WindowPaintData&) () from /lib/x86_64-linux-gnu/libkwin.so.5 #12 0x00007f93e9e38d47 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion const&, KWin::WindowPaintData&) () from /lib/x86_64-linux-gnu/libkwin.so.5 #13 0x00007f93e9e38d47 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion const&, KWin::WindowPaintData&) () from /lib/x86_64-linux-gnu/libkwin.so.5 #14 0x00007f93e9e38d47 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion const&, KWin::WindowPaintData&) () from /lib/x86_64-linux-gnu/libkwin.so.5 #15 0x00007f93e9eacc7c in KWin::Scene::paintWindow(KWin::Scene::Window*, int, QRegion const&, KWin::WindowQuadList const&) () from /lib/x86_64-linux-gnu/libkwin.so.5 #16 0x00007f93e9eade75 in KWin::Scene::paintSimpleScreen(int, QRegion const&) () from /lib/x86_64-linux-gnu/libkwin.so.5 #17 0x00007f93e9e38b2e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion const&, KWin::ScreenPaintData&) () from /lib/x86_64-linux-gnu/libkwin.so.5 #18 0x00007f93e9e38b2e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion const&, KWin::ScreenPaintData&) () from /lib/x86_64-linux-gnu/libkwin.so.5 #19 0x00007f93e9e38b2e in KWin::EffectsHandlerImpl::paintScreen(int, QRegion const&, KWin::ScreenPaintData&) () from /lib/x86_64-linux-gnu/libkwin.so.5 #20 0x00007f93e9eabecc in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, QMatrix4x4 const&, QRect const&, double) () from /lib/x86_64-linux-gnu/libkwin.so.5 #21 0x00007f93da4cdd2d in KWin::SceneOpenGL::paint(QRegion const&, QList<KWin::Toplevel*> const&) () from /usr/lib/x86_64-linux-gnu/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so #22 0x00007f93e9e0aadf in KWin::Compositor::performCompositing() () from /lib/x86_64-linux-gnu/libkwin.so.5
*** This bug has been marked as a duplicate of bug 372305 ***