Bug 486327

Summary:	Black screen with Wayland and Nvidia after locking the session.
Product:	[Plasma] kwin	Reporter:	ssergio-ll <sergio>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED WORKSFORME
Severity:	crash	CC:	fanzhuyifan
Priority:	NOR
Version First Reported In:	6.0.4
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description ssergio-ll 2024-04-30 07:44:02 UTC

SUMMARY

I have an MSI GS75 8SE laptop with KDE Plasma 6.0.4. I have disabled the laptop's screen and have the laptop connected to an LG 34GN850-B monitor via Thunderbolt. In the BIOS, I have disabled the Intel card and am using only the Nvidia RTX2060. I use Wayland on Plasma. The Nvidia drivers on my system are version 550.78. Everything works fine. If I lock the session or leave and it locks automatically, I can log back in without any problem. However, sometimes, if a significant amount of time passes and I try to log back in, after entering my password the screen turns black and only the mouse cursor is visible, forcing me to shut down the computer and restart.

STEPS TO REPRODUCE
1. Lock the session or leave the computer so it auto-locks the session.
2. Wait a considerable amount of time.
3. Try to log back in. It will freeze after entering the password.

OBSERVED RESULT

Black screen where only the mouse cursor is visible.

EXPECTED RESULT

That I can log back into the session.

SOFTWARE/OS VERSIONS

Operating System: KDE neon 6.0
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0
Kernel Version: 6.5.0-28-generic (64-bit)
Graphics Platform: Wayland
Processors: 12 × Intel® Core™ i7-8750H CPU @ 2.20GHz
Memory: 62.7 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 2060/PCIe/SSE2
Manufacturer: Micro-Star International Co., Ltd.
Product Name: GS75 Stealth 8SE
System Version: REV:1.0

Comment 1 fanzhuyifan 2024-04-30 15:59:41 UTC

Does this happen after your system suspends to ram? Have you configured Preserve video memory after suspend for your nvidia card?

Comment 2 ssergio-ll 2024-04-30 16:14:29 UTC

(In reply to fanzhuyifan from comment #1)
> Does this happen after your system suspends to ram? Have you configured
> Preserve video memory after suspend for your nvidia card?

If I suspend the system and then recover it, it works fine. Regarding what you mentioned about preserving video memory, I'm not sure what you are referring to. Where can I see that?

Comment 3 Bug Janitor Service 2024-05-15 03:45:26 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

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

Comment 4 Bug Janitor Service 2024-05-30 03:45:51 UTC

This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

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