Bug 471832

Summary:	One pixel on monitor left out when maximing window on most right screen in 3 screen setup
Product:	[Plasma] kwin	Reporter:	Moritz <bixilon>
Component:	wayland-generic	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	bixilon, xaver.hugl
Priority:	NOR
Version First Reported In:	5.27.5
Target Milestone:	---
Platform:	Debian testing
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Screenshot with spectacle

Description Moritz 2023-07-01 13:43:35 UTC

Created attachment 160022 [details]
Screenshot with spectacle

SUMMARY
I have 3 monitors set up (see https://ibb.co/G9P8WQh). I am maximing an glfw application and on the right most monitor is one pixel par on the side still free. Interstingly it stays white when the cursor moves (see the attache screenshot).


STEPS TO REPRODUCE
1.  Grab 3 monitors and an nvidia gpu
2. Open minosoft https://gitlab.bixilon.de/bixilon/minosoft, go into rendering and then maximize the window

OBSERVED RESULT


See the one pixel wide border on the right between both monitors.
EXPECTED RESULT

No border

SOFTWARE/OS VERSIONS
Operating System: siduction 22.1.0
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.107.0
Qt Version: 5.15.8
Kernel Version: 6.3.10-1-siduction-amd64 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2
Product Name: X370 Killer SLI

ADDITIONAL INFORMATION
I do mix scaling on wayland and it does not appear when all monitors are on 100%.


The screenshot shows minosoft on the left, the pixel bar in the center and my wallpaper on the right

Comment 1 Moritz 2023-07-02 12:50:13 UTC

It actually also happens on the right most screen with chromium. That is the reason why I sometimes click on other windows (that are below chromium) when going in the top right corner in order to close it and it also happens sometimes on my laptop with a single monitor at 100% scale. 


Just to mention: I do not use window frames.

Comment 2 Zamundaaa 2023-07-02 18:35:13 UTC


*** This bug has been marked as a duplicate of bug 459373 ***