Bug 450081 - When screen is locked, I must move the mouse before typing the password
Summary: When screen is locked, I must move the mouse before typing the password
Status: RESOLVED DUPLICATE of bug 449857
Alias: None
Product: kscreenlocker
Classification: Plasma
Component: general (show other bugs)
Version: 5.18.8
Platform: Kubuntu Linux
: NOR normal
Target Milestone: ---
Assignee: Plasma Bugs List
Depends on:
Reported: 2022-02-12 12:32 UTC by maciej.p.pawlowski
Modified: 2022-03-22 15:55 UTC (History)
4 users (show)

See Also:
Latest Commit:
Version Fixed In:


Note You need to log in before you can comment on or make changes to this bug.
Description maciej.p.pawlowski 2022-02-12 12:32:58 UTC

After recent Plasma update, I must move the mouse (not click, just move) in order for the lock screen to start accepting keyboard inputs. Typing the password, pressing Esc, Enter etc. gives no reaction.

1. Lock the screen using Cmd + L
2. Ensure screen is black with just the current time and date showing
3. Start typing password

No response to keyboard inputs, unless mouse moved.
Password input box shows and is focused after mouse is moved.

Password input box shows upon receiving keystrokes, even if mouse is not moved.
Password can be typed in, user can log in after pressing Enter without ever touching the mouse.

Linux: Kubuntu 20.04 LTS
KDE Plasma Version: 5.18.8
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8


bug has started appearing probably with this update
  * New upstream bugfix release (5.18.8) (LP: #1938894)

I'm experiencing this problem on 2 different machines, and I'm not the only one: 
(I'm neither of the people who posted in this thread)
Comment 1 galder 2022-02-12 17:13:34 UTC

*** This bug has been marked as a duplicate of bug 449857 ***
Comment 2 Wedge009 2022-02-15 02:59:43 UTC
For the record, I think this is actually a duplicate of bug 439604 rather than bug 449857. The former deals with Plasma 5.18.x while the latter is about Plasma 5.24 - not entirely clear if that one could also be the same bug too.

Reasoning: I use Kubuntu Backports so and Plasma 5.18.7 was published for Kubuntu Focal (current LTS) in August 2021, so I encountered bug 439604 then. Looks like Plasma 5.18.8 was published in the standard Ubuntu repository at the end of January 2022, superseding the 5.17 package in Backports. So users like Maciej are now encountering the same bug (it is still unresolved as of Plasma 5.18).
Comment 3 maciej.p.pawlowski 2022-02-15 06:55:01 UTC
Yeah, the bug I'm encountering is about needing to *move* the mouse to activate keyboard inputs, not *click* to gain focus. I can reproduce this on a Laptop with no external screens, and on a Desktop with 2 screens.

Thanks for the redirection Wedge009!
Comment 4 Wedge009 2022-02-15 23:10:50 UTC
No worries, and I made a mistake above: I meant Plasma 5.18.7 and 5.18.8, not 5.17 and 5.18.
Comment 5 Nate Graham 2022-03-22 15:55:20 UTC
*** Bug 451273 has been marked as a duplicate of this bug. ***