[kde] [Bug 498280] New: KDE suddenly become laggy

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=498280

            Bug ID: 498280
           Summary: KDE suddenly become laggy
    Classification: I don't know
           Product: kde
           Version: unspecified
          Platform: Other
                OS: Other
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: jackyzy823 at gmail.com
  Target Milestone: ---

Created attachment 177126
  --> https://bugs.kde.org/attachment.cgi?id=177126&action=edit
redacted-journal-log.txt

SUMMARY
I'm not sure what happened. But suddenly the mouse / touchpad 's move speed is
far slower than normal. The keyboard's input speed is slow too.
However the audio output is at normal speed.  The CPU/Memory usage is normal in
the System Monitor.

I tried to unplug and plug the receiver of the mouse. it doesn't help
I tried `kwin_wayland --replace` and it doesn't help.
I tried `systemctl restart sddm` and then re-login . it doesn't help.

Only reboot solves the problem.

This is the second time i encountered this issue.

OBSERVED RESULT
Random laggy

EXPECTED RESULT
No random laggy

SOFTWARE/OS VERSIONS
Linux/KDE Plasma:  Fedora 40
KDE Plasma Version: 6.2.3
KDE Frameworks Version: 6.8.0
Qt Version: 6.7.2

ADDITIONAL INFORMATION

The log around the time when laggy happens , shows 
```
Jan 05 21:21:53 MACHINE_NAME kwin_wayland[1932]: kwin_libinput: Libinput:
event14 - PNP0C50:00 0911:5288 Touchpad: kernel bug: Touch jump detected and
discarded.
                                           See
https://wayland.freedesktop.org/libinput/doc/1.26.2/touchpad-jumping-cursors.html
for details

Jan 05 21:23:52 MACHINE_NAME kwin_wayland[1932]: kwin_libinput: Libinput:
client bug: timer event14 keyboard: scheduled expiry is in the past (-70ms),
your system is too slow
Jan 05 21:24:07 MACHINE_NAME kwin_wayland_wrapper[2032]: Key repeat discarded,
Wayland compositor doesn't seem to be processing events fast enough!
```

I guess this might be related to libinput.

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