Application: kwin_x11 (5.24.4)

Qt Version: 5.15.3
Frameworks Version: 5.93.0
Operating System: Linux 5.13.0-40-generic x86_64
Windowing System: X11
Distribution: KDE neon User - 5.24
DrKonqi: 5.24.4 [KCrashBackend]

-- Information about the crash:
- What I was doing when the application crashed:
I have a second monitor, the portable one crashed, going black, after closing and re-opening it.
Actually it seem it works, even if background is black.

The reporter is unsure if this crash is reproducible.

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

[New LWP 15513]
[New LWP 15517]
[New LWP 15518]
[New LWP 15527]
[New LWP 15528]
[New LWP 15529]
[New LWP 15530]
[New LWP 15531]
[New LWP 15532]
[New LWP 15533]
[New LWP 15534]
[New LWP 15535]
[New LWP 15543]
[New LWP 15544]
[New LWP 15545]
[New LWP 15551]
[New LWP 15552]
[New LWP 15553]
[New LWP 15554]
[New LWP 15681]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007fc30d0ff9cf in __GI___poll (fds=0x7ffe68c9a278, nfds=1, timeout=1000) at ../sysdeps/unix/sysv/linux/poll.c:29
__preamble__
[Current thread is 1 (Thread 0x7fc30876e9c0 (LWP 15506))]

Thread 21 (Thread 0x7fc2b67fc700 (LWP 15681)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56168078a6e0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x56168078a690, cond=0x56168078a6b8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x56168078a6b8, mutex=0x56168078a690) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7fc291ffb700 (LWP 15554)):
#0  0x00007fc30d0ffac6 in __ppoll (fds=fds@entry=0x7fc27c000d98, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007fc30e1ea559 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7fc27c000d98) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7fc27c000d98) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll (fds=0x7fc27c000d98, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:155
#5  0x00007fc30e1ebc03 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007fc30e19287b in QEventLoop::exec (this=this@entry=0x7fc291ffabe0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007fc30dfac442 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007fc30dfad623 in QThreadPrivate::start (arg=0x56167fa26e00) at thread/qthread_unix.cpp:331
#9  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#10 0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7fc2927fc700 (LWP 15553)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56167fa5dbe0) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x56167fa5db90, cond=0x56167fa5dbb8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x56167fa5dbb8, mutex=0x56167fa5db90) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7fc292ffd700 (LWP 15552)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56167fab4868) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x56167fab4818, cond=0x56167fab4840) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x56167fab4840, mutex=0x56167fab4818) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7fc2937fe700 (LWP 15551)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc2cc098550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fc2cc098500, cond=0x7fc2cc098528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fc2cc098528, mutex=0x7fc2cc098500) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7fc2b4ff9700 (LWP 15545)):
#0  0x00007fc30d0ffac6 in __ppoll (fds=fds@entry=0x7fc28c000d78, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007fc30e1ea559 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7fc28c000d78) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7fc28c000d78) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll (fds=0x7fc28c000d78, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:155
#5  0x00007fc30e1ebc03 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007fc30e19287b in QEventLoop::exec (this=this@entry=0x7fc2b4ff8bc0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007fc30dfac442 in QThread::exec (this=this@entry=0x56167f68b290) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007fc30f08cb39 in QQmlThreadPrivate::run (this=0x56167f68b290) at qml/ftw/qqmlthread.cpp:155
#9  0x00007fc30dfad623 in QThreadPrivate::start (arg=0x56167f68b290) at thread/qthread_unix.cpp:331
#10 0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7fc2b57fa700 (LWP 15544)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc2cc7c5550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fc2cc7c5500, cond=0x7fc2cc7c5528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fc2cc7c5528, mutex=0x7fc2cc7c5500) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7fc2b5ffb700 (LWP 15543)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc2e8131550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fc2e8131500, cond=0x7fc2e8131528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fc2e8131528, mutex=0x7fc2e8131500) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7fc2ce7fc700 (LWP 15535)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc2e83e3550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fc2e83e3500, cond=0x7fc2e83e3528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fc2e83e3528, mutex=0x7fc2e83e3500) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7fc2ceffd700 (LWP 15534)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc2e84fc550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fc2e84fc500, cond=0x7fc2e84fc528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fc2e84fc528, mutex=0x7fc2e84fc500) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7fc2cf7fe700 (LWP 15533)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc2e8625550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fc2e8625500, cond=0x7fc2e8625528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fc2e8625528, mutex=0x7fc2e8625500) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7fc2cffff700 (LWP 15532)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc2e874e550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fc2e874e500, cond=0x7fc2e874e528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fc2e874e528, mutex=0x7fc2e874e500) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7fc2e8ffe700 (LWP 15531)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc2e8fff550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fc2e8fff500, cond=0x7fc2e8fff528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fc2e8fff528, mutex=0x7fc2e8fff500) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7fc2e9918700 (LWP 15530)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc2e9919550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fc2e9919500, cond=0x7fc2e9919528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fc2e9919528, mutex=0x7fc2e9919500) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7fc2ea252700 (LWP 15529)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc2ea253550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fc2ea253500, cond=0x7fc2ea253528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fc2ea253528, mutex=0x7fc2ea253500) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7fc2eb3fe700 (LWP 15528)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x7fc2f8154550) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x7fc2f8154500, cond=0x7fc2f8154528) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x7fc2f8154528, mutex=0x7fc2f8154500) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7fc2ebfff700 (LWP 15527)):
#0  0x00007fc30d0ffac6 in __ppoll (fds=fds@entry=0x7fc2e0000d78, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007fc30e1ea559 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7fc2e0000d78) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7fc2e0000d78) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll (fds=0x7fc2e0000d78, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:155
#5  0x00007fc30e1ebc03 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007fc30e19287b in QEventLoop::exec (this=this@entry=0x7fc2ebffebc0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007fc30dfac442 in QThread::exec (this=this@entry=0x56167f089a40) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007fc30f08cb39 in QQmlThreadPrivate::run (this=0x56167f089a40) at qml/ftw/qqmlthread.cpp:155
#9  0x00007fc30dfad623 in QThreadPrivate::start (arg=0x56167f089a40) at thread/qthread_unix.cpp:331
#10 0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7fc2fa048700 (LWP 15518)):
#0  0x00007fc30d0ffac6 in __ppoll (fds=fds@entry=0x7fc2f000afb8, nfds=nfds@entry=1, timeout=<optimized out>, timeout@entry=0x0, sigmask=sigmask@entry=0x0) at ../sysdeps/unix/sysv/linux/ppoll.c:44
#1  0x00007fc30e1ea559 in ppoll (__ss=<optimized out>, __timeout=<optimized out>, __nfds=<optimized out>, __fds=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/poll2.h:77
#2  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7fc2f000afb8) at kernel/qcore_unix.cpp:132
#3  qt_ppoll (timeout_ts=0x0, nfds=1, fds=0x7fc2f000afb8) at kernel/qcore_unix.cpp:129
#4  qt_safe_poll (fds=0x7fc2f000afb8, nfds=1, timeout_ts=timeout_ts@entry=0x0) at kernel/qcore_unix.cpp:155
#5  0x00007fc30e1ebc03 in QEventDispatcherUNIX::processEvents (this=<optimized out>, flags=...) at ../../include/QtCore/../../src/corelib/tools/qarraydata.h:211
#6  0x00007fc30e19287b in QEventLoop::exec (this=this@entry=0x7fc2fa047bb0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#7  0x00007fc30dfac442 in QThread::exec (this=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#8  0x00007fc30dd03f4b in ?? () from /usr/lib/x86_64-linux-gnu/libQt5DBus.so.5
#9  0x00007fc30dfad623 in QThreadPrivate::start (arg=0x7fc30dd87d80) at thread/qthread_unix.cpp:331
#10 0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7fc2fa849700 (LWP 15517)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56167edaf230) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x56167edaf1e0, cond=0x56167edaf208) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x56167edaf208, mutex=0x56167edaf1e0) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7fc304f84700 (LWP 15513)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x56167ee61938) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x56167ee618e8, cond=0x56167ee61910) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x56167ee61910, mutex=0x56167ee618e8) at pthread_cond_wait.c:638
#3  0x00007fc3053f45eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#4  0x00007fc3053f41eb in ?? () from /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007fc30dd91609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007fc30d10c163 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7fc30876e9c0 (LWP 15506)):
[KCrash Handler]
#4  0x0000000000000000 in ?? ()
#5  0x00007fc30fdd7248 in KWin::Toplevel::isOnOutput (this=0x56167f8c9910, output=<optimized out>) at ./src/toplevel.cpp:423
#6  0x00007fc30fe07bb2 in KWin::Workspace::activeOutput (this=0x56167ef57f30) at ./src/workspace.cpp:2419
#7  0x00007fc30fe31f2f in KWin::X11Client::manage (this=this@entry=0x5616807cb8e0, w=w@entry=37749151, isMapped=isMapped@entry=false) at ./src/workspace.h:811
#8  0x00007fc30fe1301f in KWin::Workspace::createClient (this=this@entry=0x56167ef57f30, w=37749151, is_mapped=is_mapped@entry=false) at ./src/workspace.cpp:654
#9  0x00007fc30fd19b9d in KWin::Workspace::workspaceEvent (this=0x56167ef57f30, e=e@entry=0x7fc30000bf60) at ./src/events.cpp:223
#10 0x00007fc30fd57e94 in KWin::Application::dispatchEvent (this=<optimized out>, event=0x7fc30000bf60) at ./src/workspace.h:811
#11 0x00007fc30e19120f in QAbstractEventDispatcher::filterNativeEvent (this=<optimized out>, eventType=..., message=message@entry=0x7fc30000bf60, result=result@entry=0x7ffe68c9b678) at kernel/qabstracteventdispatcher.cpp:495
#12 0x00007fc30808eac5 in QXcbConnection::handleXcbEvent (this=this@entry=0x56167ecb58d0, event=event@entry=0x7fc30000bf60) at qxcbnativeinterface.h:101
#13 0x00007fc30808f816 in QXcbConnection::processXcbEvents (this=0x56167ecb58d0, flags=...) at qxcbconnection.cpp:1020
#14 0x00007fc3080b9590 in QXcbUnixEventDispatcher::processEvents (this=0x56167ed77920, flags=...) at qxcbeventdispatcher.cpp:61
#15 0x00007fc30e19287b in QEventLoop::exec (this=this@entry=0x7ffe68c9b7c0, flags=..., flags@entry=...) at ../../include/QtCore/../../src/corelib/global/qflags.h:141
#16 0x00007fc30e19aa24 in QCoreApplication::exec () at ../../include/QtCore/../../src/corelib/global/qflags.h:121
#17 0x000056167d2f9c73 in main (argc=<optimized out>, argv=0x7ffe68c9ba68) at ./src/main_x11.cpp:482
[Inferior 1 (process 15506) detached]

Possible duplicates by query: bug 452083, bug 451972, bug 450954, bug 450924, bug 450337.

Reported using DrKonqi