Bug 480475

Summary:	With NVIDIA GPU, the screen goes black when the screen is locked for the second time
Product:	[Plasma] plasmashell	Reporter:	rinukus <zlumiku>
Component:	Screen locking	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	duha.bugs, fanzhuyifan, kdedev, nate
Priority:	NOR	Keywords:	qt6
Version First Reported In:	5.92.0
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description rinukus 2024-01-29 09:30:08 UTC

SUMMARY
***
The screen goes black when the screen is locked for the second time. 
When the screen is locked for the first time and unlock to enter to plasma, there is a process named kscreenlocket_greet, after manually killing it, the desktop works normally.
***

STEPS TO REPRODUCE
1. Lock screen and unlock screen
2. Lock screen again, black screen 

Linux Distro:  Arch linux
Kernel Version: 6.7.2
NVIDIA GPU driver version: 545.29.06
KDE Plasma Version: 5.92
KDE Frameworks Version: 5.248.0
Qt Version: 6.7beta

Comment 1 Nate Graham 2024-01-29 19:38:59 UTC

Works for me with an integrated Intel HD620 GPU.

What exact method are you using to lock the screen, and how are you unlocking (password, fingerprint, smart card, etc)? Does it still happen if you change how you're locking or unlocking it?

Is this on Wayland or X11?

Comment 2 fanzhuyifan 2024-01-29 20:17:56 UTC

Have you configured suspend to ram? Do you see anything, like a cursor, on the black screen?

Comment 3 duha.bugs 2024-01-29 21:29:05 UTC

Does this happen only happen if your system goes to sleep or can you reproduce if you lock your screen without going to sleep?

Possibly related/duplicate: https://bugs.kde.org/show_bug.cgi?id=480460

Comment 4 rinukus 2024-01-30 06:07:11 UTC

(In reply to Nate Graham from comment #1)
> Works for me with an integrated Intel HD620 GPU.
> 
> What exact method are you using to lock the screen, and how are you
> unlocking (password, fingerprint, smart card, etc)? Does it still happen if
> you change how you're locking or unlocking it?
> 
> Is this on Wayland or X11?

Thx your reply. I only use password to unlock screen and just single screen, these bugs happened on Wayland.

Comment 5 rinukus 2024-01-30 06:10:52 UTC

(In reply to fanzhuyifan from comment #2)
> Have you configured suspend to ram? Do you see anything, like a cursor, on
> the black screen?

Thx your reply. I enabled nvidia-suspend and nvidia-resume, as your reply, I disable these, these bugs still happen.

Comment 6 rinukus 2024-01-30 06:16:20 UTC

(In reply to duha.bugs from comment #3)
> Does this happen only happen if your system goes to sleep or can you
> reproduce if you lock your screen without going to sleep?
> 
> Possibly related/duplicate: https://bugs.kde.org/show_bug.cgi?id=480460

Thx your reply. I don't use sleep, and I try sleep, I get the same problem, auto lock screen and meta+l lock screen get same problem. I guess this bug is the same as you list

Comment 7 rinukus 2024-01-30 06:23:45 UTC

Additional Information:
Plasma Session: Wayland
Single screen and password unlocking 
Laptop Nvidia Intel dual GPU.
Thx.

Comment 8 TraceyC 2025-03-05 00:42:06 UTC

Based on the details, this looks the same as bug 478090. Please follow that report for updates. Thanks!

*** This bug has been marked as a duplicate of bug 478090 ***