https://bugs.kde.org/show_bug.cgi?id=489671

            Bug ID: 489671
           Summary: Time-based lock screen with maliit enabled has broken
                    password confirm button sometimes
    Classification: Plasma
           Product: kscreenlocker
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: plasma-b...@kde.org
          Reporter: e...@horse64.org
  Target Milestone: ---

SUMMARY

When enabling maliit, sometimes the time-based lock screen will just break and
the unlock button doesn't work. This can require a hard reset of the machine
unless the user figures out how to get it unstuck again (which is usually
possible via opening/closing maliit a few times, which due to
https://github.com/maliit/keyboard/issues/223 and
https://github.com/maliit/keyboard/issues/222 is almost impossible to
physically do). Somehow I only ever see this with the time-based lock screen
that comes up after some idle time, not any manually activated screen lock.

STEPS TO REPRODUCE

1. Use a device with a touch screen, enable maliit. Having a touch screen
probably required since it may depend on how a button is pressed later. If
possible, disconnect any regular mouse entirely. Hardware keyboards can be
connected.
2. Set the idle lock screen timer to something short like 1 minute.
3. Wait for the lock screen to come up and wait the additional seconds required
so that entering the password is guaranteed to be mandatory.
4. You can enter a password via maliit, don't touch a physical keyboard or
mouse. Entering a password can also be skipped and sometimes helps with the bug
occurring more often, but that's of course not a common use case. Afterward,
press the password input button via your finger.

OBSERVED RESULT

See attached video. The button sometimes just breaks and doesn't work anymore.

EXPECTED RESULT

The unlock button works.

SOFTWARE/OS VERSIONS

Windows: 
macOS: 
Linux/KDE Plasma: postmarketOS Edge
(available in About System)
KDE Plasma Version: 6.1.2
KDE Frameworks Version: 6.3.0
Qt Version: 6.6.3

ADDITIONAL INFORMATION

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