Bug 502626

Summary:	On X11, visual artifacts on Konsole window after screen turns back on when using NVIDIA GPU
Product:	[Applications] konsole	Reporter:	Vadym Krevs <vkrevs>
Component:	general	Assignee:	Konsole Developer <konsole-devel>
Status:	RESOLVED FIXED
Severity:	normal	CC:	kde, kdedev, nate
Priority:	NOR	Keywords:	X11-only
Version First Reported In:	24.12.3
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	example of visual artefacts after monitor turns back on

Description Vadym Krevs 2025-04-09 21:31:13 UTC

I have configured my monitor's power settings to automatically turn off (go blank) after 5 minutes (System Settings->Power Management, Display and Brightness,  Turn off screen: 5 min).

After upgrading my openSUSE 15.6 desktop to Plasma 6.3.4 from OBS, there are visual artefacts on the screen after it comes back on  - as a result of a key press or mouse move -  after turning off after a period of inactivity. See attached screenshot - red arrows point to the "artrfacts".  If I perform any action that causes some UI change, like resize a window or right-click to display context menu, etc - then the window with the artefacts gets repainted and they disappear.

This has never happened prior to upgrade to Plasma 6.3.4 (from 6.3.3).

Operating System: openSUSE Leap 15.6
KDE Plasma Version: 6.3.4
KDE Frameworks Version: 6.12.0
Qt Version: 6.9.0
Kernel Version: 6.4.0-150600.23.47-default (64-bit)
Graphics Platform: X11
Processors: 32 × AMD Ryzen 9 5950X 16-Core Processor
Memory: 125.7 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 4060 Ti
Manufacturer: ASUS

Comment 1 Vadym Krevs 2025-04-09 21:31:55 UTC

Created attachment 180136 [details]
example of visual artefacts after monitor turns back on

Comment 2 TraceyC 2025-04-09 22:12:48 UTC

The affected app in the screenshot is Konsole
I'm not able to reproduce this with git-master X11, on a system with an nvidia gpu

Comment 3 Vadym Krevs 2025-04-10 11:30:18 UTC

Actually yes, the issue only seems to affect Konsole. Does not matter what is running in that Konsole tab.

Comment 4 Nate Graham 2025-04-10 14:05:21 UTC

Some questions for you:
1. Does it happen on Wayland too, or only on X11?

2. Can you verify that your system is set up according to https://community.kde.org/Distributions/Packaging_Recommendations#Proprietary_NVidia_driver_configuration?

2a. If not, can you follow the advice there, reboot, and see if it's still happening?

Comment 5 Vadym Krevs 2025-04-10 17:28:44 UTC

1. Never used Wayland, only X11.
2. Yes
2a. Rebooted yesterday to install latest kernel update, the issue happened before reboot and keeps happenning after reboot.

Comment 6 Nate Graham 2025-04-10 17:31:32 UTC

> 1. Never used Wayland, only X11.
Sure but can you try?

Comment 7 Vadym Krevs 2025-04-10 18:18:46 UTC

(In reply to Nate Graham from comment #6)
> > 1. Never used Wayland, only X11.
> Sure but can you try?

Just tried. The issue does not appear to happen under Wayland. (Unrelated to this issue, but everything - fonts, icons, toolbars - looked larger under Wayland than under X11 - does  scaling work differently under Wayland than under X11? There is a weird gap between the taskbar panel and the bottom of the screen which is not present under X11.)

Comment 8 Vadym Krevs 2025-04-10 18:20:32 UTC

(then logged out of Wayland, logged back into Plasma X11 and my session was messed up).

Comment 9 Vadym Krevs 2025-07-06 17:42:46 UTC

This seems to have been fixed in Plasma 6.4.x. Definitely no longer happens with the following from openSUSE build service:

KDE Plasma Version: 6.4.2
KDE Frameworks Version: 6.15.0
Qt Version: 6.9.1

Comment 10 TraceyC 2025-07-07 15:51:50 UTC

That's good news, thanks for letting us know. I'll close this out for now. If the bug recurs, feel free to reopen this report.