Application: systemsettings5 (5.16.80)

Qt Version: 5.12.2
Frameworks Version: 5.60.0
Operating System: Linux 5.0.0-16-generic x86_64
Distribution: Ubuntu 19.04

-- Information about the crash:
Open the settings dialog and going to the display settings to change to a higher DPI for my 4k Display but it doesn't open.

The crash can be reproduced every time.

-- Backtrace:
Application: System Settings (systemsettings5), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f6021ec06c0 (LWP 1416))]

Thread 28 (Thread 0x7f5fad8c4700 (LWP 1713)):
#0  0x00007f60264d3729 in __GI___poll (fds=0x7f5f98004e30, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f602422fcb6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f602422fddc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6026a55063 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6026a005bb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f602684b2c6 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6025b6bef5 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f602684c612 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 27 (Thread 0x7f5fae5fc700 (LWP 1497)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e295a577dc) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e295a57788, cond=0x55e295a577b0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e295a577b0, mutex=0x55e295a57788) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 26 (Thread 0x7f5faedfd700 (LWP 1496)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e295812968) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e295812918, cond=0x55e295812940) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e295812940, mutex=0x55e295812918) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 25 (Thread 0x7f5faf7fe700 (LWP 1495)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e29537feec) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e29537fe98, cond=0x55e29537fec0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e29537fec0, mutex=0x55e29537fe98) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 24 (Thread 0x7f5faffff700 (LWP 1494)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2952a9a18) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2952a99c8, cond=0x55e2952a99f0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2952a99f0, mutex=0x55e2952a99c8) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 23 (Thread 0x7f5fb68cf700 (LWP 1493)):
#0  0x00007f60264d3729 in __GI___poll (fds=0x7f5fa8004e30, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f602422fcb6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f602422fddc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6026a55063 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6026a005bb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f602684b2c6 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6025b6bef5 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f602684c612 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 22 (Thread 0x7f5fb7f54700 (LWP 1489)):
#0  0x00007f60264d3729 in __GI___poll (fds=0x7f5fb0004a30, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f602422fcb6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f602422fddc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6026a55063 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6026a005bb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f602684b2c6 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6025b6bef5 in ?? () from /lib/x86_64-linux-gnu/libQt5Qml.so.5
#7  0x00007f602684c612 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 21 (Thread 0x7f5fd9ffb700 (LWP 1487)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cdb20) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cdad0, cond=0x55e2946cdaf8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cdaf8, mutex=0x55e2946cdad0) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 20 (Thread 0x7f5fda7fc700 (LWP 1486)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cdb20) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cdad0, cond=0x55e2946cdaf8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cdaf8, mutex=0x55e2946cdad0) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 19 (Thread 0x7f5fdaffd700 (LWP 1480)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cdb20) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cdad0, cond=0x55e2946cdaf8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cdaf8, mutex=0x55e2946cdad0) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 18 (Thread 0x7f5fdb7fe700 (LWP 1479)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cdb20) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cdad0, cond=0x55e2946cdaf8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cdaf8, mutex=0x55e2946cdad0) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 17 (Thread 0x7f5fdbfff700 (LWP 1475)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cdb20) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cdad0, cond=0x55e2946cdaf8) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cdaf8, mutex=0x55e2946cdad0) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 16 (Thread 0x7f5ff4ff9700 (LWP 1474)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 15 (Thread 0x7f5ff57fa700 (LWP 1473)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 14 (Thread 0x7f5ff5ffb700 (LWP 1472)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f5ff67fc700 (LWP 1471)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f5ff6ffd700 (LWP 1470)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f5ff77fe700 (LWP 1469)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f5ff7fff700 (LWP 1468)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f600cff9700 (LWP 1467)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f600d7fa700 (LWP 1466)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f600dffb700 (LWP 1465)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f600e7fc700 (LWP 1464)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f600effd700 (LWP 1463)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946cd5a4) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946cd550, cond=0x55e2946cd578) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946cd578, mutex=0x55e2946cd550) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f600f7fe700 (LWP 1462)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e294504b18) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e294504ac8, cond=0x55e294504af0) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e294504af0, mutex=0x55e294504ac8) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f600ffff700 (LWP 1461)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x55e2946c3ea0) at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1  __pthread_cond_wait_common (abstime=0x0, mutex=0x55e2946c3e50, cond=0x55e2946c3e78) at pthread_cond_wait.c:502
#2  __pthread_cond_wait (cond=0x55e2946c3e78, mutex=0x55e2946c3e50) at pthread_cond_wait.c:655
#3  0x00007f601ccf8bab in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#4  0x00007f601ccf8917 in ?? () from /usr/lib/x86_64-linux-gnu/dri/radeonsi_dri.so
#5  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#6  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f601f062700 (LWP 1421)):
#0  0x00007f60264d3729 in __GI___poll (fds=0x7f6010004e30, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f602422fcb6 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f602422fddc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f6026a55063 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f6026a005bb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f602684b2c6 in QThread::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f6026ccd565 in ?? () from /lib/x86_64-linux-gnu/libQt5DBus.so.5
#7  0x00007f602684c612 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6024cc7182 in start_thread (arg=<optimized out>) at pthread_create.c:486
#9  0x00007f60264dfb1f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f6021ec06c0 (LWP 1416)):
[KCrash Handler]
#6  0x00007f5faef108f4 in KScreen::GetConfigOperation::start() () from /lib/x86_64-linux-gnu/libKF5Screen.so.7
#7  0x00007f6026a2bca2 in QObject::event(QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f6027461551 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#9  0x00007f6027468930 in QApplication::notify(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#10 0x00007f6026a018e9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f6026a04927 in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007f6026a55a43 in ?? () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f602422faae in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#14 0x00007f602422fd48 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#15 0x00007f602422fddc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#16 0x00007f6026a55047 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#17 0x00007f6026a005bb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#18 0x00007f6026a085e2 in QCoreApplication::exec() () from /lib/x86_64-linux-gnu/libQt5Core.so.5
#19 0x000055e2936cb639 in ?? ()
#20 0x00007f60263e8b6b in __libc_start_main (main=0x55e2936cb250, argc=1, argv=0x7ffc01f8e6c8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffc01f8e6b8) at ../csu/libc-start.c:308
#21 0x000055e2936cb6ba in _start ()
[Inferior 1 (process 1416) detached]

Reported using DrKonqi