Cannot unlock screen without mouse click

[Bast1aan]

In Kubuntu 20.04 after recent update from plasma-workspace 5.18.5 to 5.18.8, I am unable to unlock my screen by just typing my user password, as I was used to before. Now only a screen with a clock appears and no password textbox, there is nothing that I can do to activate the password textbox but to click somewhere with my mouse. The extra click with the mouse that is now necessary is inconvenient to me and a UX regression in my opinion, especially because I quite often lock my screen when working in the office.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: plasma-workspace 4:5.18.8-0ubuntu0.1
ProcVersionSignature: Ubuntu 5.13.0-30.33~20.04.1-generic 5.13.19
Uname: Linux 5.13.0-30-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.21
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: KDE
Date: Fri Feb 18 22:33:01 2022
InstallationDate: Installed on 2021-06-10 (252 days ago)
InstallationMedia: Kubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
SourcePackage: plasma-workspace
UpgradeStatus: No upgrade log present (probably fresh install)

[Bast1aan (bast1aan)]

Just reproduced in a clean install in a VM to rule out configuration cruft on my laptop. With plasma-workspace 5.18.5 it doesn't appear, on 5.18.8 it does, as shown in the attached video.

[Tuomas Suutari (tuomas-suutari)]

I also have this same problem with Ubuntu 20.04.4 and plasma-workspace 5.18.8-0ubuntu0.1.

I think this is caused by the following upstream bug:
https://bugs.kde.org/show_bug.cgi?id=439604

That bug is closed without a fix though, because 5.18 is unmaintained. However, there's another upstream bug about similar issue in:
https://bugs.kde.org/show_bug.cgi?id=449857

WORKAROUND / FIX

1. sudo nano -w /usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/LockScreenUi.qml
2. Comment out "enabled: visible" on line 234

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Tuomas Suutari (tuomas-suutari)]

Patch to /usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/lockscreen/LockScreenUi.qml

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "Fix lock screen password input with keyboard only" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Scarlett Gately Moore (scarlettmoore)]

This bug is very old. if it is still an issue please update the bug with info from a supported release.