Comment # 31 on bug 964548 from Lorenzo Desole

(In reply to Andreas Stieger from comment #30)
> releasing for 42.1

I urge you to reconsider that.

Depending on the lockscreen theme in use, in case of monitor (un)plugging, you
get:

1) a crash after entering the password; this will cause kscreenlocker to be
respawned. It's a minor annoyance because you can re-enter the password and
everything is fine

or

2) kscreenlocker can't be unlocked at all, i.e. you are locked out of your PC.
This is a severe regression.

I get #1 with the internal fallback lockscreen.

I get #2 with the opensuse lockscreen.

Apparently this can't be fixed and upstream doesn't like the proposed
workarounds.