[kde] [Bug 462723] New: Desktop freezes for no obvious reason

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=462723

            Bug ID: 462723
           Summary: Desktop freezes for no obvious reason
    Classification: I don't know
           Product: kde
           Version: unspecified
          Platform: Ubuntu
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: leonardopsantos at gmail.com
  Target Milestone: ---

Created attachment 154371
  --> https://bugs.kde.org/attachment.cgi?id=154371&action=edit
dmesg after the desktop froze

I'm experiencing a problem where my desktop suddenly freezes: 

1. I can move the mouse,
2. I can not activate any windows
3. The windows are not functional: say that I have Kate open; even if it was
the active window when the freeze happens, I can't type anything. This happens
to any application (Firefox, VSCode, etc), Kate is just an example.
4. The hang doesn't have an obvious reason: sometimes I'm on Firefox, sometimes
I'm coding in VSCode. Sometimes I go weeks without any problems, sometimes it
happens two times in a single day.
5. There are no crash reports; things just stop working.
6. I usually don't do two weeks without a hang.
7. The machine itself doesn't hang, I can use CTRL+ALT+F2 to open a new tty and
restart the display manager or reset the machine.
8. I'm using multiple monitors

I'm not really sure what component is at fault here: the display manager, kwin,
plasma manager.

Resetting the machine obviously fixes things. I figured out that using
`systemctl restart display-manager` also fixes things.

I'd be glad to provide any other information, log files, or follow any steps to
help narrow down this issue.

STEPS TO REPRODUCE
1. None, really, just using KDE to work.

OBSERVED RESULT
KDE hangs, mouse moves, machine is functional if I use a different TTY.

EXPECTED RESULT
Not hanging?

SOFTWARE/OS VERSIONS
Operating System: Kubuntu 22.04
KDE Plasma Version: 5.24.6
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3
Kernel Version: 5.15.0-56-generic (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i5-8265U CPU @ 1.60GHz
Memory: 15.3 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620

ADDITIONAL INFORMATION
I've attached my dmesg and syslog files. I've created them by switching to a
new TTY with CTRL+ALF+F2

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