https://bugs.kde.org/show_bug.cgi?id=472445

            Bug ID: 472445
           Summary: Persistent blackscreen on X11 and Wayland after
                    changing screen resolution
    Classification: Plasma
           Product: kwin
           Version: 5.27.6
          Platform: openSUSE
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: core
          Assignee: kwin-bugs-n...@kde.org
          Reporter: holdenrf2...@gmail.com
  Target Milestone: ---

SUMMARY

Was playing around with a few things with theming over the past day or two on
my work laptop, which is a Dell Inspiron 16 5625 with AMD 5825U CPU/Radeon
graphics on OpenSUSE Tumbleweed kernel 6.4.3-1. Had changed a number of things
and could be related to any of these, but what kicked off the blackscreen was
changing the resolution from the default 1920x1200 to 1920x1080. 

Upon doing this, my screen instantly went black and it was clear things
were...running fine but just...not displaying in the right place. Changing to
ttyX worked fine and I could log in, but even on restarting sddm, reloading to
multi-user.target, graphical.target, etc. and restarting sddm, running
"startx," etc. etc. etc. failed. Reboot would bring up sddm login screen just
fine, but trying to login to either Plasma X11 or Plasma Wayland would lead to
the same black screen. It's notable to mention that IceWM which is included by
default in OpenSUSE TW would open fine. At least if it was the first option
chosen after reboot. Additionally, systemctl wasn't reporting any failed
services or units that I could tell...

Could always change to ttyX using standard keystrokes but no matter what I did,
nothing in my standard "toolkit" would get it to restart normally until I
physically plugged in an external monitor. Even physically changing
~/.local/share/kscreen/output/relevantscreen values back to 1920x1200 didn't
seem to work until I finally plugged in the external monitor, upon which
everything came back up and appeared to display just fine. 

It's also notable that I had been running another VM of nixOS with KDE plasma
using kvm/qemu virtualization in virt-manager at the time, using the modular
systemd services and with a network bridge attached. I initially tried lowering
the resolution because virt-manager kept trying to display the VM window too
large and that appeared to be on the host side of things rather than the VM
side (i.e. windowing of the virt-manager screen on my host OS was defaulting
too large and going offscreen). Was really just playing around testing a few
things and not expecting something like this to cause such a serious crash. 

Anyways, I'm not sure if the crash logs below are fully related but I've been
needing to get more involved in open source projects and KDE is one of my
favorites. :) I can try to reproduce later if information supplied is
insufficient, but as this is my work laptop I'm more hesitant to break it...

This could also be related to some of the other things I was testing, so I'm
happy to provide more information if needed. Was kinda doing a lot on this
laptop the past few days, so it could be more of a "me" problem than a bug
others would hit. Moved from a dual boot setup with windows/opensuse TW and was
hoping to use my current windows install (now in a USB-C NVME adapter)
sandboxed in a VM for the very rare occasion I would need it for testing future
windows builds of software for work. Also backed up my previous home folder
from the dual-boot setup (same setup with OpenSUSE TW/Plasma) in a
sub-subdirectory within my new ~/Desktop so I considered the case maybe some
config files were getting sourced incorrectly, but I wouldn't think that would
be the case... 
***
NOTE: If you are reporting a crash, please try to attach a backtrace with debug
symbols.
See
https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports
***


STEPS TO REPRODUCE (Have not tried since fixing, but I can later on if needed)
1. ... 
2. Change screen resolution from default 1920x1200 to 1920x1080 
3. Blackscreen? 
4. Annoyance

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS

Linux/KDE Plasma: Opensuse tumbleweed, kernel 6.4.3.1-default (64 bit)
KDE Plasma Version: 5.27.6
KDE Frameworks Version: 5.108.0
Qt Version: 5.15.10

ADDITIONAL INFORMATION
holden@tumble-dell:~$ sudo coredumpctl gdb 3309
           PID: 3309 (kwin_wayland)
           UID: 1000 (holden)
           GID: 1000 (holden)
        Signal: 11 (SEGV)
     Timestamp: Thu 2023-07-20 17:22:56 EDT (1h 36min ago)
  Command Line: /usr/bin/kwin_wayland --wayland-fd 7 --socket wayland-0
--xwayland-fd 8 --xwayland-fd 9 --xwayland-display :1 --xwayland-xauthority
/run/user/1000/xauth_VnHRnI --xwayland
    Executable: /usr/bin/kwin_wayland
 Control Group:
/user.slice/user-1000.slice/user@1000.service/session.slice/plasma-kwin_wayland.service
          Unit: user@1000.service
     User Unit: plasma-kwin_wayland.service
         Slice: user-1000.slice
     Owner UID: 1000 (holden)
       Boot ID: c320dc0af9224153b49661a988146e94
    Machine ID: e57d7bc7c7ed47c79ed0d0a273a00ee0
      Hostname: tumble-dell
       Storage:
/var/lib/systemd/coredump/core.kwin_wayland.1000.c320dc0af9224153b49661a988146e94.3309.1689888176000000.zst
(present)
  Size on Disk: 29.2M
       Message: Process 3309 (kwin_wayland) of user 1000 dumped core.

                Stack trace of thread 3309:
                #0  0x00007fc9b3eb11ec wl_resource_post_event
(libwayland-server.so.0 + 0xb1ec)
                #1  0x00007fc9b71c3756 n/a (libkwin.so.5 + 0x3c3756)
                #2  0x00007fc9b71c39b0 n/a (libkwin.so.5 + 0x3c39b0)
                #3  0x00007fc9b55257a2 n/a (libQt5Core.so.5 + 0x3257a2)
                #4  0x00007fc9b71649d5 _ZN4KWin10DrmBackend13updateOutputsEv
(libkwin.so.5 + 0x3649d5)
                #5  0x00007fc9b71588cd _ZN4KWin10DrmBackend10reactivateEv
(libkwin.so.5 + 0x3588cd)
                #6  0x00007fc9b55257a2 n/a (libQt5Core.so.5 + 0x3257a2)
                #7  0x00007fc9b6f7b2c2 _ZN4KWin7Session13deviceResumedEm
(libkwin.so.5 + 0x17b2c2)
                #8  0x00007fc9b6fbcdb1 n/a (libkwin.so.5 + 0x1bcdb1)
                #9  0x00007fc9b6f7fcd5 n/a (libkwin.so.5 + 0x17fcd5)
                #10 0x00007fc9b749246b n/a (libQt5DBus.so.5 + 0x2846b)
                #11 0x00007fc9b55192b0 _ZN7QObject5eventEP6QEvent
(libQt5Core.so.5 + 0x3192b0)
                #12 0x00007fc9b4ba519e
_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5 +
0x1a519e)
                #13 0x00007fc9b54ed4f8
_ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5 +
0x2ed4f8)
                #14 0x00007fc9b54f0af1
_ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData
(libQt5Core.so.5 + 0x2f0af1)
                #15 0x00007fc9b5543991
_ZN20QEventDispatcherUNIX13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5 + 0x343991)
                #16 0x00005640612a86cd n/a (kwin_wayland + 0x1366cd)
                #17 0x00007fc9b54ebf8b
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 +
0x2ebf8b)
                #18 0x00007fc9b54f4420 _ZN16QCoreApplication4execEv
(libQt5Core.so.5 + 0x2f4420)
                #19 0x00005640611cbf6a n/a (kwin_wayland + 0x59f6a)
                #20 0x00007fc9b4343bf0 __libc_start_call_main (libc.so.6 +
0x27bf0)
                #21 0x00007fc9b4343cb9 __libc_start_main@@GLIBC_2.34 (libc.so.6
+ 0x27cb9)
                #22 0x00005640611cda65 n/a (kwin_wayland + 0x5ba65)

                Stack trace of thread 3367:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 3360:
                #0  0x00007fc9b442348f __poll (libc.so.6 + 0x10748f)
                #1  0x00007fc9b2d16d0e n/a (libglib-2.0.so.0 + 0x5dd0e)
                #2  0x00007fc9b2d16e2c g_main_context_iteration
(libglib-2.0.so.0 + 0x5de2c)
                #3  0x00007fc9b5546496
_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5 + 0x346496)
                #4  0x00007fc9b54ebf8b
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 +
0x2ebf8b)
                #5  0x00007fc9b5302d5e _ZN7QThread4execEv (libQt5Core.so.5 +
0x102d5e)
                #6  0x00007fc9b7484517 n/a (libQt5DBus.so.5 + 0x1a517)
                #7  0x00007fc9b5303f8d n/a (libQt5Core.so.5 + 0x103f8d)
                #8  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #9  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 3365:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 3364:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 3374:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 3369:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 23585:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 3372:
                #0  0x00007fc9b442348f __poll (libc.so.6 + 0x10748f)
                #1  0x00007fc9b2d16d0e n/a (libglib-2.0.so.0 + 0x5dd0e)
                #2  0x00007fc9b2d16e2c g_main_context_iteration
(libglib-2.0.so.0 + 0x5de2c)
                #3  0x00007fc9b5546496
_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5 + 0x346496)
                #4  0x00007fc9b54ebf8b
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 +
0x2ebf8b)
                #5  0x00007fc9b5302d5e _ZN7QThread4execEv (libQt5Core.so.5 +
0x102d5e)
                #6  0x00007fc9b6542685 n/a (libQt5Qml.so.5 + 0x342685)
                #7  0x00007fc9b5303f8d n/a (libQt5Core.so.5 + 0x103f8d)
                #8  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #9  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 23587:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 3366:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 23594:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 3368:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9b530980b
_ZN14QWaitCondition4waitEP6QMutex14QDeadlineTimer (libQt5Core.so.5 + 0x10980b)
                #3  0x00007fc9b74ded6f n/a (libQt5DBus.so.5 + 0x74d6f)
                #4  0x00007fc9b749b236 n/a (libQt5DBus.so.5 + 0x31236)
                #5  0x00007fc9b74853fb
_ZNK15QDBusConnection4callERK12QDBusMessageN5QDBus8CallModeEi (libQt5DBus.so.5
+ 0x1b3fb)
                #6  0x00007fc9b6fd2756 n/a (libkwin.so.5 + 0x1d2756)
                #7  0x00007fc9b718deb7 n/a (libkwin.so.5 + 0x38deb7)
                #8  0x00007fc9b3de079e n/a (libinput.so.10 + 0x2679e)
                #9  0x00007fc9b3df3973 n/a (libinput.so.10 + 0x39973)
                #10 0x00007fc9b3df3d14 n/a (libinput.so.10 + 0x39d14)
                #11 0x00007fc9b7187c21 n/a (libkwin.so.5 + 0x387c21)
                #12 0x00007fc9b55192b0 _ZN7QObject5eventEP6QEvent
(libQt5Core.so.5 + 0x3192b0)
                #13 0x00007fc9b4ba519e
_ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent (libQt5Widgets.so.5 +
0x1a519e)
                #14 0x00007fc9b54ed4f8
_ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5 +
0x2ed4f8)
                #15 0x00007fc9b54f0af1
_ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData
(libQt5Core.so.5 + 0x2f0af1)
                #16 0x00007fc9b5546c83 n/a (libQt5Core.so.5 + 0x346c83)
                #17 0x00007fc9b2d16988 g_main_context_dispatch
(libglib-2.0.so.0 + 0x5d988)
                #18 0x00007fc9b2d16d98 n/a (libglib-2.0.so.0 + 0x5dd98)
                #19 0x00007fc9b2d16e2c g_main_context_iteration
(libglib-2.0.so.0 + 0x5de2c)
                #20 0x00007fc9b5546496
_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5 + 0x346496)
                #21 0x00007fc9b54ebf8b
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 +
0x2ebf8b)
                #22 0x00007fc9b5302d5e _ZN7QThread4execEv (libQt5Core.so.5 +
0x102d5e)
                #23 0x00007fc9b5303f8d n/a (libQt5Core.so.5 + 0x103f8d)
                #24 0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #25 0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 23690:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 23828:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 28527:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 28591:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 30200:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 30843:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 5795:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 3375:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)

                Stack trace of thread 26058:
                #0  0x00007fc9b43a620e __futex_abstimed_wait_common (libc.so.6
+ 0x8a20e)
                #1  0x00007fc9b43a8f50 pthread_cond_wait@@GLIBC_2.3.2
(libc.so.6 + 0x8cf50)
                #2  0x00007fc9accbe80b n/a (radeonsi_dri.so + 0xbe80b)
                #3  0x00007fc9acd0d037 n/a (radeonsi_dri.so + 0x10d037)
                #4  0x00007fc9b43a9c64 start_thread (libc.so.6 + 0x8dc64)
                #5  0x00007fc9b4431550 __clone3 (libc.so.6 + 0x115550)
                ELF object binary architecture: AMD x86-64

GNU gdb (GDB; openSUSE Tumbleweed) 13.2
Copyright (C) 2023 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-suse-linux".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://bugs.opensuse.org/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/bin/kwin_wayland...
(No debugging symbols found in /usr/bin/kwin_wayland)

warning: Can't open file /memfd:gdk-wayland (deleted) during file-backed
mapping note processing

warning: Can't open file /memfd:JSGCHeap:QtQml (deleted) during file-backed
mapping note processing

warning: Can't open file /memfd:JSVMStack:QtQml (deleted) during file-backed
mapping note processing

warning: Can't open file /memfd:wayland-shm (deleted) during file-backed
mapping note processing

warning: Can't open file /memfd:wayland-cursor (deleted) during file-backed
mapping note processing

warning: Can't open file /memfd:mozilla-ipc (deleted) during file-backed
mapping note processing

warning: Can't open file /memfd:xwayland-shared (deleted) during file-backed
mapping note processing

warning: Can't open file /memfd:kwayland-shared (deleted) during file-backed
mapping note processing

warning: Can't open file /memfd:unknown-usage:QtQml (deleted) during
file-backed mapping note processing

warning: Can't open file /memfd:JITCode:QtQml (deleted) during file-backed
mapping note processing
[New LWP 3309]
[New LWP 3367]
[New LWP 3360]
[New LWP 3365]
[New LWP 3364]
[New LWP 3374]
[New LWP 3369]
[New LWP 23585]
[New LWP 3372]
[New LWP 23587]
[New LWP 3366]
[New LWP 23594]
[New LWP 3368]
[New LWP 23690]
[New LWP 23828]
[New LWP 28527]
[New LWP 28591]
[New LWP 30200]
[New LWP 30843]
[New LWP 5795]
[New LWP 3375]
[New LWP 26058]

warning: Section `.reg-xstate/3309' in core file too small.

--Type <RET> for more, q to quit, c to continue without paging--
Missing separate debuginfos, use: zypper install
kwin5-debuginfo-5.27.6-1.1.x86_64[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `/usr/bin/kwin_wayland --wayland-fd 7 --socket wayland-0
--xwayland-fd 8 --xwayl'.
Program terminated with signal SIGSEGV, Segmentation fault.

warning: Section `.reg-xstate/3309' in core file too small.
#0  0x00007fc9b3eb11ec in wl_resource_post_event ()
   from /lib64/libwayland-server.so.0
[Current thread is 1 (Thread 0x7fc9b1e34e40 (LWP 3309))]

holden@tumble-dell:~$ sudo coredumpctl gdb 23916
           PID: 23916 (sddm)
           UID: 1000 (holden)
           GID: 1000 (holden)
        Signal: 6 (ABRT)
     Timestamp: Thu 2023-07-20 18:12:40 EDT (48min ago)
  Command Line: sddm
    Executable: /usr/bin/sddm
 Control Group: /user.slice/user-1000.slice/session-7.scope
          Unit: session-7.scope
         Slice: user-1000.slice
       Session: 7
     Owner UID: 1000 (holden)
       Boot ID: a0832f2159b1427e8d7d609a1119c3c7
    Machine ID: e57d7bc7c7ed47c79ed0d0a273a00ee0
      Hostname: tumble-dell
       Storage:
/var/lib/systemd/coredump/core.sddm.1000.a0832f2159b1427e8d7d609a1119c3c7.23916.1689891160000000.zst
(present)
  Size on Disk: 354.6K
       Message: Process 23916 (sddm) of user 1000 dumped core.

                Stack trace of thread 23916:
                #0  0x00007f285c892abc __pthread_kill_implementation (libc.so.6
+ 0x8fabc)
                #1  0x00007f285c841266 raise (libc.so.6 + 0x3e266)
                #2  0x00007f285c829897 abort (libc.so.6 + 0x26897)
                #3  0x00007f285cebb4f9 _ZNK14QMessageLogger5fatalEPKcz
(libQt5Core.so.5 + 0xbb4f9)
                #4  0x0000560a9898fe01 n/a (sddm + 0x12e01)
                #5  0x0000560a989c3b4f n/a (sddm + 0x46b4f)
                #6  0x0000560a989c4a69 n/a (sddm + 0x47a69)
                #7  0x0000560a989c4d33 n/a (sddm + 0x47d33)
                #8  0x00007f285d1257a2 n/a (libQt5Core.so.5 + 0x3257a2)
                #9  0x0000560a989bfe6f n/a (sddm + 0x42e6f)
                #10 0x00007f285d1257a2 n/a (libQt5Core.so.5 + 0x3257a2)
                #11 0x00007f285dc493ff
_ZN23QDBusPendingCallWatcher8finishedEPS_ (libQt5DBus.so.5 + 0x743ff)
                #12 0x00007f285d1192b0 _ZN7QObject5eventEP6QEvent
(libQt5Core.so.5 + 0x3192b0)
                #13 0x00007f285d0ed4cd
_ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt5Core.so.5 +
0x2ed4cd)
                #14 0x00007f285d0f0af1
_ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData
(libQt5Core.so.5 + 0x2f0af1)
                #15 0x00007f285d146c83 n/a (libQt5Core.so.5 + 0x346c83)
                #16 0x00007f285bb16988 g_main_context_dispatch
(libglib-2.0.so.0 + 0x5d988)
                #17 0x00007f285bb16d98 n/a (libglib-2.0.so.0 + 0x5dd98)
                #18 0x00007f285bb16e2c g_main_context_iteration
(libglib-2.0.so.0 + 0x5de2c)
                #19 0x00007f285d146496
_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5 + 0x346496)
                #20 0x00007f285d0ebf8b
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 +
0x2ebf8b)
                #21 0x00007f285d0f4420 _ZN16QCoreApplication4execEv
(libQt5Core.so.5 + 0x2f4420)
                #22 0x0000560a98998594 n/a (sddm + 0x1b594)
                #23 0x00007f285c82abf0 __libc_start_call_main (libc.so.6 +
0x27bf0)
                #24 0x00007f285c82acb9 __libc_start_main@@GLIBC_2.34 (libc.so.6
+ 0x27cb9)
                #25 0x0000560a9899a985 n/a (sddm + 0x1d985)

                Stack trace of thread 23917:
                #0  0x00007f285c90a48f __poll (libc.so.6 + 0x10748f)
                #1  0x00007f285bb16d0e n/a (libglib-2.0.so.0 + 0x5dd0e)
                #2  0x00007f285bb16e2c g_main_context_iteration
(libglib-2.0.so.0 + 0x5de2c)
                #3  0x00007f285d146496
_ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE
(libQt5Core.so.5 + 0x346496)
                #4  0x00007f285d0ebf8b
_ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt5Core.so.5 +
0x2ebf8b)
                #5  0x00007f285cf02d5e _ZN7QThread4execEv (libQt5Core.so.5 +
0x102d5e)
                #6  0x00007f285dbef517 n/a (libQt5DBus.so.5 + 0x1a517)
                #7  0x00007f285cf03f8d n/a (libQt5Core.so.5 + 0x103f8d)
                #8  0x00007f285c890c64 start_thread (libc.so.6 + 0x8dc64)
                #9  0x00007f285c918550 __clone3 (libc.so.6 + 0x115550)
                ELF object binary architecture: AMD x86-64

GNU gdb (GDB; openSUSE Tumbleweed) 13.2
Copyright (C) 2023 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-suse-linux".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://bugs.opensuse.org/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/bin/sddm...
(No debugging symbols found in /usr/bin/sddm)
[New LWP 23916]
[New LWP 23917]

warning: Section `.reg-xstate/23916' in core file too small.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `sddm'.
Program terminated with signal SIGABRT, Aborted.

warning: Section `.reg-xstate/23916' in core file too small.
#0  0x00007f285c892abc in __pthread_kill_implementation () from
/lib64/libc.so.6
[Current thread is 1 (Thread 0x7f285cc83840 (LWP 23916))]
Missing separate debuginfos, use: zypper install
sddm-debuginfo-0.20.0-2.1.x86_64
(gdb)

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