Bug 502958

Summary:	X11 Lock screen not visually accepting keyboard input when displays set to unify outputs
Product:	[Plasma] plasmashell	Reporter:	Waqar Ahmed <waqar.17a>
Component:	Screen locking	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	REPORTED ---
Severity:	major	CC:	kdedev, nate
Priority:	NOR	Keywords:	X11-only
Version First Reported In:	6.3.3
Target Milestone:	1.0
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Waqar Ahmed 2025-04-18 05:30:39 UTC

SUMMARY

After waking the laptop from sleep, lockscreen doesn't accept keyboard input (with an external screen). This happens from time to time. Even the virtual on screen keyboard doesn't work.

Saw this thread: https://discuss.kde.org/t/kde-will-not-accept-keyboard-input-on-unlock-screen/1878/2?page=2 and it was suggested to plug/unplug the screen. After doing that, keyboard started working.

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux 
KDE Plasma Version: 6.3.3
KDE Frameworks Version: 6.12.0
Qt Version: 6.8.2
Kernel Version: 6.6.84-1-MANJARO (64-bit)
Graphics Platform: X11
Processors: 8 × AMD Ryzen 7 4700U with Radeon Graphics
Memory: 15.0 GiB of RAM
Graphics Processor: AMD Radeon Graphics

Comment 1 Waqar Ahmed 2025-04-21 12:10:56 UTC

Seems like its accepting input, just that the line edit looks empty visually but it actually has content. If I unplug the screen, it starts showing dots. This is consistently reproducible since a couple of days.

Comment 2 Waqar Ahmed 2025-04-21 12:13:04 UTC

If I "Switch to external screen" or "Switch to laptop screen", there is no bug.

It only happens with "unify outputs"

Comment 3 TraceyC 2025-04-21 16:15:34 UTC

I'm not able to reproduce this on git-master X11

Does this happen only with X11 or with Wayland also?

Comment 4 Bug Janitor Service 2025-05-06 03:47:12 UTC

🐛🧹 ⚠️ This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information, then set the bug status to REPORTED. If there is no change for at least 30 days, it will be automatically closed as RESOLVED WORKSFORME.

For more information about our bug triaging procedures, please read https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging.

Thank you for helping us make KDE software even better for everyone!

Comment 5 Waqar Ahmed 2025-05-06 05:22:28 UTC

> Does this happen only with X11 or with Wayland also?

No idea, I hardly ever use Wayland.

Setting back to REPORTED to prevent auto close of ticket

Comment 6 Waqar Ahmed 2025-05-06 05:27:06 UTC

It seems like its a bit random, right now I was not able to reproduce. But it suddenly starts reproducing. (Still on the same plasma version).

Bit unrelated, there is definitely a focus issue with the Password Lineedit. Sometimes I can directly type the password after locking the screen, other times I need to manually click in the field.