Bug 483704

Summary:	Screen locker breaks if you unlock your session and then lock it again within one second
Product:	[Plasma] plasmashell	Reporter:	Fabio S. Reszko Jr. <s.reszkojr>
Component:	Screen locking	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED FIXED
Severity:	grave	CC:	jpetso, medip642, miltonh26, nate, titouan-camus
Priority:	NOR	Keywords:	qt6
Version First Reported In:	6.0.2
Target Milestone:	1.0
Platform:	Fedora RPMs
OS:	Linux
Latest Commit:	https://invent.kde.org/plasma/kwin/-/commit/9b05a7e6a7494f942d1906bd4acb2e19d32db217	Version Fixed In:	6.3.0
Sentry Crash Report:

Description Fabio S. Reszko Jr. 2024-03-15 21:00:00 UTC

SUMMARY
KDE won't show screen locker if you unlock your session and, in less than a second, and lock it again

STEPS TO REPRODUCE
1. Lock your session/screen with Win+L
2. Wait for screen locker to show up and type in your password and press enter
3. Almost instantly after pressing enter, press Win+L to lock your screen again

OBSERVED RESULT
The screen locker won't show up and you will be presented a black screen.

EXPECTED RESULT
The screen locker should show up again and everything would be fine and happy.

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 40
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Kernel Version: 6.8.0-63.fc40.1.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8565U CPU @ 1.80GHz
Memory: 11.6 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620
Manufacturer: LENOVO
Product Name: 81S9
System Version: Lenovo IdeaPad S145-15IWL

ADDITIONAL INFORMATION:
To workaround this issue, go to a different TTY and type in "loginctl unlock-session 2" (if on Wayland, I don't know about X11).

Comment 1 Titouan Camus 2024-03-16 08:18:14 UTC

I can reproduce.

Operating System: KDE neon 6.0
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Kernel Version: 6.5.0-25-generic (64-bit)

Comment 2 Edip 2024-03-17 09:30:36 UTC

i can reproduce on archlinux 6.0.2

Comment 3 Nate Graham 2024-04-10 19:25:11 UTC

Can also reproduce the issue.

Comment 4 Jakob Petsovits 2024-12-18 19:21:18 UTC

Cannot reproduce on Plasma master from a few days ago. I get the behavior described as "EXPECTED RESULT".

Comment 5 Nate Graham 2024-12-18 19:23:23 UTC

Indeed, same. This was very likely fixed by https://invent.kde.org/plasma/kwin/-/merge_requests/6881, which is in Plasma 6.2.5 and 6.3.0.