https://bugs.kde.org/show_bug.cgi?id=457996

            Bug ID: 457996
           Summary: Plasmashell seems to crash sometimes after waking from
                    standby with Wayland+KDE (default wallpaper, no panel,
                    ...)
           Product: plasmashell
           Version: 5.18.8
          Platform: Debian stable
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: plasma-b...@kde.org
          Reporter: myndstr...@protonmail.ch
                CC: k...@davidedmundson.co.uk
  Target Milestone: 1.0

SUMMARY
Since I connected a new screen to my PC (and this may be unrelated) it
sometimes happens that when I wake my PC from standby (with that other screen
turned off before and after standby) plasma seems to have crashed:

- The wallpaper is the default one
- Sometimes the lockscreen is the default one but sometimes it keeps my
lockscreen (when I enter my password at the lockscreen I had to click on the
password field or it didn't enter it)
- The panel at the bottom disappeared and when I click the Meta/Windows key
nothing happens
- When I move windows like the konsole window, the window becomes invisible
until it's at the new place

In system monitor it shows that plasmashell is running (started by systemd) and
that startplasma-waylandsession is running (started by
systemd->sddm->sddm-helper->startplasma-wayland->kwin_wayland)

I'm using Wayland on Debian11/KDE.

When I enter journalctrl -b it only shows very three entries for the day at the
bottom like "systemd: Started konsole." and many for the previous day even
though I had my computer running for quite a while today. (Note there's also a
loss of bash history when using Wayland on Debian and I used to restore it from
backups until this became too frequent. Wayland-KDE bugs really should get
fixed.)

Please let me know if there's anything else I could run to investigate this. I
usually try running killall plasmashell and kstart5 plasmashell to get it
working again and if that doesn't work I have to end the session and log in
again.

STEPS TO REPRODUCE
1. Use Wayland on Debian11/KDE
2. Put the PC on standby
3. Wake it

OBSERVED RESULT
Sometimes plasmashell seems to have crashed

EXPECTED RESULT
Plasmashell should not seem to crash, there should be no problems after waking
the PC.


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Debian 11
KDE Plasma Version:  5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION

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