Bug 484880

Summary:	1px bottom and right not refreshing on scale +130%
Product:	[Plasma] kwin	Reporter:	Thorsten Rapp <trusten>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	minor	CC:	mds_foss, xaver.hugl
Priority:	NOR
Version First Reported In:	6.0.3
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Thorsten Rapp 2024-04-01 17:31:16 UTC

SUMMARY
Scale over 125% there is a 1px line on the bottom and right side of the screen that doesnt refresh if only part of scrren changes.

On screen scale 120% or below this is not happening.

STEPS TO REPRODUCE
1.  Set screen scale to 140%
2.  Put a auto hiding dock on bottom or activate screen corner for bottom left/right (or play a video on fullscreen)

OBSERVED RESULT
In case of auto hiding dock let it hide and move mouse down to get the highlight, move the mouse away, a line with the higlight color stays. Or using screen edges, move the mouse near the edge to trigger the color higlighting, move the mouse away and a 1px line stays there. Or if video, let it play for a few seconds and observe the bottom and right edge.

Triggering a virtual desktop switch/scroll or something that refreshes all the screen clears it to normal until next event.

EXPECTED RESULT

No pixel left overs

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: openSuse Tumbleweed
(available in About System)
KDE Plasma Version: 6.0.3
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.3

ADDITIONAL INFORMATION
I tried to make a sceen capture but the problem isn't captured only visible on screen. Feels like the pixel line above the last one is duplicated below and not refreshed.

Screen resolution: 2560x1440
Scale: 140%

Sorry if maybe this is assigned to the wrong product and component

Comment 1 mydarkstar 2024-04-05 05:12:12 UTC

Hello Thorsten, is this the bug you are experiencing?
https://bugs.kde.org/show_bug.cgi?id=480171

It also shows a white line on the right and bottom edges of the screen.

Comment 2 Thorsten Rapp 2024-04-05 07:28:11 UTC

(In reply to mydarkstar from comment #1)
> Hello Thorsten, is this the bug you are experiencing?
> https://bugs.kde.org/show_bug.cgi?id=480171
> 
> It also shows a white line on the right and bottom edges of the screen.

Hello,
It's more like a smearing of the previous pixel... kind of...
I recorded a small video showcasing the problem on the bottom edge with a plasma6 panel and app launcher; and uploaded it in 3 formats, hope this helps. I can also upload it to Nextcloud if needed or prefered, because this links will only work for 4 months.

https://pixeldrain.com/u/GPXZ4sDx IMG_2997.ogg
https://pixeldrain.com/u/Riu63bTz IMG_2997.MOV
https://pixeldrain.com/u/HuKQeDhL IMG_2997.mp4

https://pixeldrain.com/l/HC6xYkpi All 3 files

If I can help with something more please let me know. Thank you

Comment 3 Zamundaaa 2024-04-05 13:51:19 UTC


*** This bug has been marked as a duplicate of bug 482987 ***