https://bugs.kde.org/show_bug.cgi?id=423668

--- Comment #1 from Andrew O. <and...@aobuchow.com> ---
So I've been actively trying to reproduce the bug and now have learned a bit
more about the nature of the bug.

>From what it seems, there are certain scenarios where my Plasma session's
screen will turn black without actually locking the screen.

Thus, when this occurs, I type in my login password and hit enter before the
screen has recovered from being darkened. The issue is that my session is not
locked and thus whatever application that was last focused receives the
keyboard input.

In my Plasma settings, I have:
- Power Management >> Energy Saving >> Dim Screen after 10 min
- Power Management >> Energy Saving >> Screen energy saving: switch off after
10 min
- Power Management >> Energy Saving >> Suspend session is *not* enabled
- Workspace Behavior >> Screen locking >> Lock screen automatically after 10
min
- Workspace Behavior >> Screen locking >> Lock screen after waking from sleep
enabled
- Workspace Behavior >> Screen locking >> Allow unlocking without password for:
immediately

Ideas as to what causes the issue:
- Suspend session (in power management) is not enabled. Maybe this would force
the session to always lock after a period of inactivity, as per the "Lock
screen after waking from sleep enabled" setting. However, ideally, I don't want
to resort to suspending my session (as it'll take more time to resume using my
laptop)

- There is a race condition between "Dim Screen after 10 min" and "Lock screen
automatically after 10 min". I don't know why dimming the screen would prevent
the locking from occurring, but the fact that the screen dim's but does not
lock is suspicious. 

- "Lock screen automatically after X min" has a bug, and does not always get
triggered.

For now, I'm going to set automatic screen locking after 5 minutes, to see if
the bug continues.


I hope this update is a bit more actionable. If further information is required
just let me know :)

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