Application: kwin_x11 (5.20.5)

Qt Version: 5.15.2
Frameworks Version: 5.78.0
Operating System: Linux 5.4.0-62-generic x86_64
Windowing system: X11
Distribution: KDE neon User Edition 5.20

-- Information about the crash:
- What I was doing when the application crashed:
I was just booting my system up - This never happended before. I did run system updates early on 18.01.21 CET, before shutting the system down, however.
- Custom settings of the application: 
None

-- Backtrace:
Application: KWin (kwin_x11), signal: Segmentation fault

[New LWP 1710]
[New LWP 1711]
[New LWP 1713]
[New LWP 1714]
[New LWP 1715]
[New LWP 1716]
[New LWP 1717]
[New LWP 1832]
[New LWP 2116]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f2cddb96aff in __GI___poll (fds=0x7fff16a24168, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:29
[Current thread is 1 (Thread 0x7f2cd80408c0 (LWP 1709))]

Thread 10 (Thread 0x7f2cc225a700 (LWP 2116)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7f2cdd953fd8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7f2cdd953f88, cond=0x7f2cdd953fb0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7f2cdd953fb0, mutex=0x7f2cdd953f88) at pthread_cond_wait.c:638
#3  0x00007f2cdd85663a in ?? () from /lib/x86_64-linux-gnu/libQt5Script.so.5
#4  0x00007f2cdd85665f in ?? () from /lib/x86_64-linux-gnu/libQt5Script.so.5
#5  0x00007f2cdd34a609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f2cddba3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f2cc305b700 (LWP 1832)):
#0  0x00007f2cddb96bf6 in __ppoll (fds=0x7f2ca8000d78, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007f2cde189eb9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f2cde18b563 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f2cde1321ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f2cddf4ca12 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f2cdc8d2fa9 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#6  0x00007f2cddf4dbac in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2cdd34a609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#8  0x00007f2cddba3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f2ccdffb700 (LWP 1717)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5619d89b7fa8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5619d89b7f58, cond=0x5619d89b7f80) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5619d89b7f80, mutex=0x5619d89b7f58) at pthread_cond_wait.c:638
#3  0x00007f2cd4b94b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4  0x00007f2cd4b9475b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5  0x00007f2cdd34a609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f2cddba3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f2cce7fc700 (LWP 1716)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5619d89b7fa8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5619d89b7f58, cond=0x5619d89b7f80) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5619d89b7f80, mutex=0x5619d89b7f58) at pthread_cond_wait.c:638
#3  0x00007f2cd4b94b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4  0x00007f2cd4b9475b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5  0x00007f2cdd34a609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f2cddba3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f2cceffd700 (LWP 1715)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5619d89b7fa8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5619d89b7f58, cond=0x5619d89b7f80) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5619d89b7f80, mutex=0x5619d89b7f58) at pthread_cond_wait.c:638
#3  0x00007f2cd4b94b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4  0x00007f2cd4b9475b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5  0x00007f2cdd34a609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f2cddba3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f2ccf7fe700 (LWP 1714)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5619d89b7fa8) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5619d89b7f58, cond=0x5619d89b7f80) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5619d89b7f80, mutex=0x5619d89b7f58) at pthread_cond_wait.c:638
#3  0x00007f2cd4b94b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4  0x00007f2cd4b9475b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5  0x00007f2cdd34a609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f2cddba3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f2ccffff700 (LWP 1713)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x5619d89b7088) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5619d89b7038, cond=0x5619d89b7060) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5619d89b7060, mutex=0x5619d89b7038) at pthread_cond_wait.c:638
#3  0x00007f2cd4b94b5b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#4  0x00007f2cd4b9475b in ?? () from /usr/lib/x86_64-linux-gnu/dri/r600_dri.so
#5  0x00007f2cdd34a609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f2cddba3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f2cd6939700 (LWP 1711)):
#0  0x00007f2cddb96bf6 in __ppoll (fds=0x7f2cc800bfb8, nfds=1, timeout=<optimized out>, sigmask=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007f2cde189eb9 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f2cde18b563 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f2cde1321ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f2cddf4ca12 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f2cdf276f4b in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#6  0x00007f2cddf4dbac in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f2cdd34a609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#8  0x00007f2cddba3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f2cd787d700 (LWP 1710)):
#0  0x00007f2cddb96aff in __GI___poll (fds=0x7f2cd787cbe8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f2cdde5fc1a in ?? () from /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f2cdde6190a in xcb_wait_for_event () from /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f2cd7963d58 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f2cddf4dbac in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f2cdd34a609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f2cddba3293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f2cd80408c0 (LWP 1709)):
[KCrash Handler]
#4  0x00005619d97530d0 in ?? ()
#5  0x00007f2cdd9cb427 in ?? () from /lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#6  0x00007f2cdd9cc21d in ?? () from /lib/x86_64-linux-gnu/libkwin4_effect_builtins.so.1
#7  0x00007f2cdf5428a7 in KWin::EffectsHandlerImpl::paintWindow (this=this@entry=0x5619d91ac5e0, w=0x5619d9380260, mask=mask@entry=10, region=..., data=...) at ./effects.cpp:426
#8  0x00007f2cdf5cd345 in KWin::Scene::paintWindow (this=0x5619d8b7fbb0, w=0x5619d9320130, mask=10, _region=..., quads=...) at ./scene.cpp:472
#9  0x00007f2cdf5ca70f in KWin::Scene::paintSimpleScreen (this=<optimized out>, orig_mask=8, region=...) at ./scene.cpp:384
#10 0x00007f2cdf5c65c6 in KWin::Scene::finalPaintScreen (this=0x5619d8b7fbb0, mask=<optimized out>, region=..., data=...) at ./scene.cpp:188
#11 0x00007f2cdf5426b2 in KWin::EffectsHandlerImpl::paintScreen (this=0x5619d91ac5e0, mask=<optimized out>, region=..., data=...) at ./effects.cpp:383
#12 0x00007f2cdf5426b2 in KWin::EffectsHandlerImpl::paintScreen (this=0x5619d91ac5e0, mask=<optimized out>, region=..., data=...) at ./effects.cpp:383
#13 0x00007f2cdf5426b2 in KWin::EffectsHandlerImpl::paintScreen (this=0x5619d91ac5e0, mask=<optimized out>, region=..., data=...) at ./effects.cpp:383
#14 0x00007f2cdf5cc6b4 in KWin::Scene::paintScreen (this=this@entry=0x5619d8b7fbb0, mask=mask@entry=0x7fff16a24ce8, damage=..., repaint=..., updateRegion=updateRegion@entry=0x7fff16a24cd0, validRegion=validRegion@entry=0x7fff16a24cd8, projection=..., outputGeometry=..., screenScale=1) at ./scene.cpp:135
#15 0x00007f2ccc034c48 in KWin::SceneOpenGL::paint (this=0x5619d8b7fbb0, damage=..., toplevels=...) at ./plugins/scenes/opengl/scene_opengl.h:115
#16 0x00007f2cdf508b3f in KWin::Compositor::performCompositing (this=0x5619d88e3330) at ./composite.cpp:689
#17 0x00007f2cde161155 in QObject::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f2cdec0adc3 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007f2cdec13bb8 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#20 0x00007f2cde13369a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f2cde18d2f0 in QTimerInfoList::activateTimers() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f2cde18b6b7 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00007f2cd7965132 in ?? () from /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#24 0x00007f2cde1321ab in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f2cde13a354 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00005619d78ada2d in main (argc=<optimized out>, argv=0x7fff16a25578) at ./main_x11.cpp:484
[Inferior 1 (process 1709) detached]

The reporter indicates this bug may be a duplicate of or related to bug 372305.

Possible duplicates by query: bug 430699, bug 430648, bug 430160, bug 429532, bug 429217.

Reported using DrKonqi