Bug 426046

Summary: KDE plasma settings and Discover crash after fiddling with Compositioning
Product: [Applications] Discover Reporter: Giorgio Pintaudi <giorgio.pimpa>
Component: discoverAssignee: Dan Leinir Turthra Jensen <leinir>
Status: RESOLVED DOWNSTREAM    
Severity: crash CC: aleixpol, giorgio.pimpa, nate
Priority: NOR Keywords: drkonqi
Version First Reported In: 5.18.5   
Target Milestone: ---   
Platform: Ubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Giorgio Pintaudi 2020-09-01 03:20:59 UTC 
Application: plasma-discover (5.18.5)

Qt Version: 5.12.8
Frameworks Version: 5.68.0
Operating System: Linux 5.4.0-42-generic x86_64
Windowing system: X11
Distribution: Ubuntu 20.04.1 LTS

-- Information about the crash:
- What I was doing when the application crashed:

Trying to open KDE system settings or Discover

- Unusual behavior I noticed:

I was getting a lot of screen tearing during web browsing with both Google Chrome and Firefox. So I tried to change the Compositioning settings from Opengl3.1 to Xrender and back. At a certain point, the system setting crashed and now I cannot open it anymore (it crashes every time I open it).

- Custom settings of the application:

Composition settings changed. It would be useful to know how to change those settings from the command line.

The crash can be reproduced every time.

-- Backtrace:
Application: Discover (plasma-discover), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556237f22010) at ../sysdeps/nptl/futex-internal.h:183
[Current thread is 1 (Thread 0x7f7643291f40 (LWP 16124))]

Thread 14 (Thread 0x7f7610f13700 (LWP 16140)):
[KCrash Handler]
#6  0x00007f76393e0278 in iris_resource_bo (p_res=0x0) at ../src/gallium/drivers/iris/iris_resource.h:290
#7  stream_state (batch=0x55623826dd00, uploader=<optimized out>, size=size@entry=24, alignment=alignment@entry=64, out_offset=out_offset@entry=0x7f7610f11d10, out_bo=out_bo@entry=0x0) at ../src/gallium/drivers/iris/iris_blorp.c:62
#8  0x00007f76393e147d in blorp_alloc_dynamic_state (blorp_batch=0x7f7610f12620, blorp_batch=0x7f7610f12620, offset=0x7f7610f11d10, alignment=64, size=24) at ../src/gallium/drivers/iris/iris_blorp.c:138
#9  blorp_emit_color_calc_state (params=0x7f7610f11ec0, batch=0x7f7610f12620) at ../src/intel/blorp/blorp_genX_exec.h:1120
#10 blorp_emit_pipeline (params=0x7f7610f11ec0, batch=0x7f7610f12620) at ../src/intel/blorp/blorp_genX_exec.h:1267
#11 blorp_exec (params=<optimized out>, batch=0x7f7610f12620) at ../src/intel/blorp/blorp_genX_exec.h:1968
#12 iris_blorp_exec (blorp_batch=0x7f7610f12620, params=<optimized out>) at ../src/gallium/drivers/iris/iris_blorp.c:310
#13 0x00007f76395a5a84 in blorp_clear (batch=batch@entry=0x7f7610f12620, surf=surf@entry=0x7f7610f12650, format=ISL_FORMAT_B8G8R8X8_UNORM, swizzle=..., swizzle@entry=..., level=level@entry=0, start_layer=0, num_layers=1, x0=0, y0=0, x1=2560, y1=1351, clear_color=..., color_write_disable=0x7f7610f12640) at ../src/intel/blorp/blorp_clear.c:567
#14 0x00007f76393bc86d in clear_color (ice=ice@entry=0x55623826d790, p_res=<optimized out>, level=<optimized out>, box=box@entry=0x7f7610f12740, render_condition_enabled=render_condition_enabled@entry=true, format=<optimized out>, swizzle=..., color=...) at ../src/gallium/drivers/iris/iris_clear.c:389
#15 0x00007f76393bd4a5 in iris_clear (ctx=0x55623826d790, buffers=7, p_color=0x556238277754, depth=<optimized out>, stencil=<optimized out>) at ../src/gallium/drivers/iris/iris_clear.c:678
#16 0x00007f76389fb8d4 in st_Clear (ctx=0x556238275620, mask=50) at ../src/mesa/state_tracker/st_cb_clear.c:513
#17 0x00007f764946301c in QSGBatchRenderer::Renderer::renderBatches() () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#18 0x00007f76494694b2 in QSGBatchRenderer::Renderer::render() () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#19 0x00007f7649455964 in QSGRenderer::renderScene(QSGBindable const&) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#20 0x00007f7649455e13 in QSGRenderer::renderScene(unsigned int) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#21 0x00007f76494982b4 in QSGDefaultRenderContext::renderNextFrame(QSGRenderer*, unsigned int) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#22 0x00007f76494fe65c in QQuickWindowPrivate::renderSceneGraph(QSize const&) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#23 0x00007f76494a45b8 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#24 0x00007f76494a8318 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#25 0x00007f76478189d2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#27 0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 13 (Thread 0x7f761273e700 (LWP 16137)):
#0  syscall () at ../sysdeps/unix/sysv/linux/x86_64/syscall.S:38
#1  0x00007f764781add1 in QSemaphore::acquire(int) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#2  0x00007f7647a0c77d in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007f7646e9bb00 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#4  0x00007f7646f525b4 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#5  0x00007f7647a0c300 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f7646e91555 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#7  0x00007f7646e91e1b in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#8  0x00007f7647a0c300 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f7646f4b703 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#10 0x00007f7646f3fa3e in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#11 0x00007f7646f3fe86 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#12 0x00007f7646f19d73 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#13 0x00007f7647a0c300 in QMetaObject::activate(QObject*, int, int, void**) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#14 0x00007f7646edc854 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#15 0x00007f7646edc8ef in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#16 0x00007f7646eeee29 in  () at /lib/x86_64-linux-gnu/libQt5Network.so.5
#17 0x00007f7648984a66 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#18 0x00007f764898e0f0 in QApplication::notify(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#19 0x00007f76479e093a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#20 0x00007f7647a391c5 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f7645f66fbd in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f7645f67240 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f7645f672e3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f7647a38565 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#25 0x00007f76479df4db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#26 0x00007f7647817785 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#27 0x00007f76478189d2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#28 0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#29 0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 12 (Thread 0x7f7613325700 (LWP 16136)):
#0  0x00007f7645fb4368 in g_mutex_unlock () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7645f66721 in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7645f670db in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7645f672e3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7647a38583 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f76479df4db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f7647817785 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f76478189d2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 11 (Thread 0x7f7603231700 (LWP 16134)):
#0  __GI___libc_read (nbytes=16, buf=0x7f7603230bd0, fd=25) at ../sysdeps/unix/sysv/linux/read.c:26
#1  __GI___libc_read (fd=25, buf=0x7f7603230bd0, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f7645faf89f in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7645f66cfe in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7645f67152 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7645f67533 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f7645cc3eda in  () at /lib/x86_64-linux-gnu/libgio-2.0.so.0
#7  0x00007f7645f90931 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#8  0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 10 (Thread 0x7f7603a32700 (LWP 16133)):
#0  0x00007f764749a96f in __GI___poll (fds=0x556237ed9710, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7645f671ae in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7645f672e3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7645f67331 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7645f90931 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 9 (Thread 0x7f7628f57700 (LWP 16132)):
#0  0x00007f764749a96f in __GI___poll (fds=0x7f7618004f90, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7645f671ae in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7645f672e3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7647a38583 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f76479df4db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f7647817785 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f764941be1a in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f76478189d2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#9  0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 8 (Thread 0x7f762a168700 (LWP 16131)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556237577408) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5562375773b8, cond=0x5562375773e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5562375773e0, mutex=0x5562375773b8) at pthread_cond_wait.c:638
#3  0x00007f7638d3b62b in cnd_wait (mtx=0x5562375773b8, cond=0x5562375773e0) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x55623761c6e0) at ../src/util/u_queue.c:275
#5  0x00007f7638d3b23b in impl_thrd_routine (p=<optimized out>) at ../include/c11/threads_posix.h:87
#6  0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 7 (Thread 0x7f762a969700 (LWP 16130)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556237577408) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5562375773b8, cond=0x5562375773e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5562375773e0, mutex=0x5562375773b8) at pthread_cond_wait.c:638
#3  0x00007f7638d3b62b in cnd_wait (mtx=0x5562375773b8, cond=0x5562375773e0) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x5562379444c0) at ../src/util/u_queue.c:275
#5  0x00007f7638d3b23b in impl_thrd_routine (p=<optimized out>) at ../include/c11/threads_posix.h:87
#6  0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 6 (Thread 0x7f762b16a700 (LWP 16129)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556237577408) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5562375773b8, cond=0x5562375773e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5562375773e0, mutex=0x5562375773b8) at pthread_cond_wait.c:638
#3  0x00007f7638d3b62b in cnd_wait (mtx=0x5562375773b8, cond=0x5562375773e0) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x556237958240) at ../src/util/u_queue.c:275
#5  0x00007f7638d3b23b in impl_thrd_routine (p=<optimized out>) at ../include/c11/threads_posix.h:87
#6  0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 5 (Thread 0x7f762b96b700 (LWP 16128)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556237577408) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x5562375773b8, cond=0x5562375773e0) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x5562375773e0, mutex=0x5562375773b8) at pthread_cond_wait.c:638
#3  0x00007f7638d3b62b in cnd_wait (mtx=0x5562375773b8, cond=0x5562375773e0) at ../include/c11/threads_posix.h:155
#4  util_queue_thread_func (input=input@entry=0x5562375b8560) at ../src/util/u_queue.c:275
#5  0x00007f7638d3b23b in impl_thrd_routine (p=<optimized out>) at ../include/c11/threads_posix.h:87
#6  0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#7  0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 4 (Thread 0x7f763bfff700 (LWP 16127)):
#0  0x00007f7645f6372d in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#1  0x00007f7645f65185 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f7645f6666b in g_main_context_prepare () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7645f670db in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7645f672e3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7647a38583 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007f76479df4db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f7647817785 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f76480941a9 in  () at /lib/x86_64-linux-gnu/libQt5Qml.so.5
#9  0x00007f76478189d2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 3 (Thread 0x7f7641422700 (LWP 16126)):
#0  __GI___libc_read (nbytes=16, buf=0x7f7641421a60, fd=6) at ../sysdeps/unix/sysv/linux/read.c:26
#1  __GI___libc_read (fd=6, buf=0x7f7641421a60, nbytes=16) at ../sysdeps/unix/sysv/linux/read.c:24
#2  0x00007f7645faf89f in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f7645f66cfe in g_main_context_check () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f7645f67152 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f7645f672e3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#6  0x00007f7647a38583 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007f76479df4db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007f7647817785 in QThread::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#9  0x00007f7648eccefa in  () at /lib/x86_64-linux-gnu/libQt5DBus.so.5
#10 0x00007f76478189d2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#11 0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#12 0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 2 (Thread 0x7f76422d9700 (LWP 16125)):
#0  0x00007f764749a96f in __GI___poll (fds=0x7f76422d8ba8, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007f7645e59c1a in  () at /lib/x86_64-linux-gnu/libxcb.so.1
#2  0x00007f7645e5b90a in xcb_wait_for_event () at /lib/x86_64-linux-gnu/libxcb.so.1
#3  0x00007f7642ac5298 in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#4  0x00007f76478189d2 in  () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f7646826609 in start_thread (arg=<optimized out>) at pthread_create.c:477
#6  0x00007f76474a7103 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95

Thread 1 (Thread 0x7f7643291f40 (LWP 16124)):
#0  futex_wait_cancelable (private=<optimized out>, expected=0, futex_word=0x556237f22010) at ../sysdeps/nptl/futex-internal.h:183
#1  __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x556237f21fc0, cond=0x556237f21fe8) at pthread_cond_wait.c:508
#2  __pthread_cond_wait (cond=0x556237f21fe8, mutex=0x556237f21fc0) at pthread_cond_wait.c:638
#3  0x00007f764781eb0f in QWaitCondition::wait(QMutex*, QDeadlineTimer) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#4  0x00007f764781ec01 in QWaitCondition::wait(QMutex*, unsigned long) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#5  0x00007f76494a66d2 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#6  0x00007f76494a75b2 in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#7  0x00007f76494a7d6b in  () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#8  0x00007f76483609ad in QWindow::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#9  0x00007f764950b159 in QQuickWindow::event(QEvent*) () at /lib/x86_64-linux-gnu/libQt5Quick.so.5
#10 0x00007f7648984a66 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#11 0x00007f764898e0f0 in QApplication::notify(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Widgets.so.5
#12 0x00007f76479e093a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007f7648356de6 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#14 0x00007f7648357014 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#15 0x00007f764833135b in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Gui.so.5
#16 0x00007f7642ac632e in  () at /lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#17 0x00007f7645f66fbd in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#18 0x00007f7645f67240 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#19 0x00007f7645f672e3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#20 0x00007f7647a38565 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#21 0x00007f76479df4db in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#22 0x00007f76479e7246 in QCoreApplication::exec() () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#23 0x00005562361b54f1 in  ()
#24 0x00007f76473ac0b3 in __libc_start_main (main=0x5562361b4d00, argc=3, argv=0x7fff9d2696f8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff9d2696e8) at ../csu/libc-start.c:308
#25 0x00005562361b5b1e in _start ()
[Inferior 1 (process 16124) detached]

Reported using DrKonqi
Comment 1 Nate Graham 2020-09-08 15:21:56 UTC 
What's your graphics hardware?
Comment 2 Giorgio Pintaudi 2020-09-09 08:47:57 UTC 
(In reply to Nate Graham from comment #1)
> What's your graphics hardware?

My Laptop is LENOVO Carbon x1 6th gen.
The video card is an integrated Intel UHD Graphics 620.
Comment 3 Nate Graham 2020-09-09 15:48:10 UTC 
Hmm, that's pretty close to my hardware (Gen 3 X1 Yoga).

Regardless, the crash is deep in the Intel graphics drivers, so I suggest you report it to the driver developers here: https://gitlab.freedesktop.org/drm/intel/-/issues