https://bugs.kde.org/show_bug.cgi?id=390760
--- Comment #4 from Michael D <nortex...@gmail.com> ---
I discovered the following in my /var/log/kern.log which may be a bit helpful.
It happened after a resume from suspend. (Still can't get a proper backtrace.)
Feb 25 21:17:26 michael-yoga kernel: [ 8139.547367] kwin_wayland[1251]:
segfault at 10 ip 00007efc0caf6fd0 sp 00007fffd40b88c8 error 4 in
libKF5WaylandServer.so.5.43.0[7efc0ca72000+d2000]
Feb 25 21:17:26 michael-yoga sddm-helper[1201]: [PAM] Closing session
Feb 25 21:17:28 michael-yoga sddm-helper[1201]: [PAM] Ended.
Feb 25 21:17:28 michael-yoga sddm[917]: Auth: sddm-helper exited successfully
Feb 25 21:17:28 michael-yoga sddm[917]: Greeter stopping...
Feb 25 21:17:28 michael-yoga sddm[917]: Socket server stopping...
Feb 25 21:17:28 michael-yoga sddm[917]: Socket server stopped.
Feb 25 21:17:28 michael-yoga sddm[917]: Display server stopping...
Feb 25 21:17:28 michael-yoga sddm-greeter[1144]: The X11 connection broke: I/O
error (code 1)
Feb 25 21:17:28 michael-yoga sddm-helper[1135]: [PAM] Closing session
Feb 25 21:17:28 michael-yoga sddm-helper[1135]: [PAM] Ended.
Feb 25 21:17:33 michael-yoga sddm[917]: Removing display ":0" ...
Feb 25 21:17:33 michael-yoga sddm[917]: Adding new display on vt 7 ...
Feb 25 21:17:33 michael-yoga sddm[917]: Loading theme configuration from ""
Feb 25 21:17:33 michael-yoga sddm[917]: Display server starting...
Feb 25 21:17:33 michael-yoga sddm[917]: Running: /usr/bin/X -nolisten tcp -auth
/var/run/sddm/{163cc817-3a33-4f8e-9d51-60915bb77926} -background none -noreset
-displayfd 22 -seat seat0 vt7
Feb 25 21:17:33 michael-yoga sddm[917]: Setting default cursor
Feb 25 21:17:33 michael-yoga sddm[917]: Running display setup script
"/usr/share/sddm/scripts/Xsetup"
Feb 25 21:17:33 michael-yoga sddm[917]: Display server started.
Feb 25 21:17:33 michael-yoga sddm[917]: Socket server starting...
Feb 25 21:17:33 michael-yoga sddm[917]: Socket server started.
Feb 25 21:17:33 michael-yoga sddm[917]: Loading theme configuration from
"/usr/share/sddm/themes/breeze/theme.conf"
Feb 25 21:17:33 michael-yoga sddm[917]: Greeter starting...
Feb 25 21:17:33 michael-yoga sddm[917]: Adding cookie to
"/var/run/sddm/{163cc817-3a33-4f8e-9d51-60915bb77926}"
Feb 25 21:17:33 michael-yoga sddm[917]: Display server stopping...
Feb 25 21:17:33 michael-yoga sddm[917]: Display server stopped.
Feb 25 21:17:33 michael-yoga sddm[917]: Running display stop script
"/usr/share/sddm/scripts/Xstop"
Feb 25 21:17:33 michael-yoga sddm[917]: Greeter stopping...
Feb 25 21:17:33 michael-yoga sddm[917]: QProcess: Destroyed while process
("/usr/lib/x86_64-linux-gnu/sddm/sddm-helper") is still running.
Feb 25 21:17:33 michael-yoga sddm-helper[8718]: [PAM] Starting...
Feb 25 21:17:33 michael-yoga sddm-helper[8718]: [PAM] Authenticating...
Feb 25 21:17:33 michael-yoga sddm-helper[8718]: [PAM] returning.
Feb 25 21:17:33 michael-yoga sddm[917]: Greeter session started successfully
On earlier dates, kern.log shows:
Feb 22 20:34:13 michael-yoga kernel: [32110.623142] kwin_wayland[10959]:
segfault at 30 ip 00007fda8c0572a0 sp 00007ffcaf4a52c0 error 4 in
libQt5Core.so.5.9.3[7fda8bdda000+52e000]
Feb 24 14:14:47 michael-yoga kernel: [15097.989608] kwin_wayland[1245]:
segfault at 7f2256b17ec0 ip 00007f2278069eb0 sp 00007ffd8c8701a0 error 4 in
libEGL.so.1.0.0[7f2278054000+39000]
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