Bug 484253

Summary:	Visual Bugs in KiCAD on Plasma 6 Wayland
Product:	[Plasma] kwin	Reporter:	Tim <timrflatt>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	Deckweiss75, kdedev, mobile.harvey
Priority:	NOR	Keywords:	wayland-only
Version First Reported In:	6.0.2
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Picture of the Bug Screencapture of the bug

Description Tim 2024-03-22 15:49:59 UTC

SUMMARY
KiCAD has visual bugs on my KDE Plasma installation with Wayland Session displayed on my 32:9 Monitor.
After unsuccessfully trying to reproduce the bug on Plasma with X11 and GNOME with Wayland, I suspect that the fault could be within the combination of Plasma with wayland. I've attached a screenrecording of me reproducting the bug.

STEPS TO REPRODUCE
1. Open KiCAD Schematic- and/or PCB-Editor
2. Drag  windows to edges or corners to resize
I've attached a screenrecording of me reproducting the bug.

OBSERVED RESULT
A graphical bug appears within the KiCAD window when resizing.
This does not happen every time but is reproducible on Plasma 6 with Wayland.

EXPECTED RESULT
The content should resize and position properly.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux/ KDE Plasma 6
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
KiCAD Version: 8.0.1-1

Comment 1 Tim 2024-03-22 15:55:45 UTC

Created attachment 167612 [details]
Picture of the Bug

Comment 2 Tim 2024-03-22 16:03:36 UTC

Created attachment 167613 [details]
Screencapture of the bug

Qualitiy is low due to compression but bug should still be visible

Comment 3 Nick 2024-03-22 17:00:13 UTC

Hi - I've tried duplicating this on my Neon (Plasma 6.0.20 laptop with KiCAD 6.0.2. Running Wayland on Intel graphics. I'm not able to duplicate it currently.

Are you able to confirm whether you have a discrete graphics card which might be a factor? Any other ideas on how to duplicate this would be appreciated. Thanks, Nick

Comment 4 Tim 2024-03-22 17:34:15 UTC

(In reply to Nick from comment #3)
> Hi - I've tried duplicating this on my Neon (Plasma 6.0.20 laptop with KiCAD
> 6.0.2. Running Wayland on Intel graphics. I'm not able to duplicate it
> currently.
> 
> Are you able to confirm whether you have a discrete graphics card which
> might be a factor? Any other ideas on how to duplicate this would be
> appreciated. Thanks, Nick

Hi, I do have a dGPU (RX 7700S) in this system, however KiCAD only uses the integrated graphics (Radeon 780M) by default.
So far I've encountered this bug only when plugging into the external monitor (via HDMI) so not on the internal display of the laptop.
I also run a newer version of KiCAD - even though I don't know if that helps in any way.
Thanks for your quick reply, hope some of the information is usefull to you.
Cheers, Tim

Comment 5 Nick 2024-03-22 19:02:33 UTC

Hi - I just re-tried it using KiCAD 8.01 (Flatpak) with my external monitor connected via HDMI. Cannot duplicate. I'll leave this here hoping someone else with hardware similar to yours, plus perhaps the non-flatpak KiCAD 8.01 can duplicate it. Thanks, Nick

Comment 6 Tim 2024-03-25 13:40:29 UTC

Tested for the same bug with my desktop system (also with Arch + Plasma 6 installed) connected to the very same display with no problems at all. It seems like the bug appears only on my Laptop (Framework 16). 
Cheers, Tim

Comment 7 TraceyC 2025-04-04 16:17:59 UTC

Moving to kwin, which handles window drawing

Comment 8 Deckweiss75 2025-11-08 11:31:03 UTC

I have a potentially related issue which I reported over here: https://gitlab.com/kicad/code/kicad/-/issues/22261

Mine seems to be related to display scale settings. Maybe it bugs the other way too, where the view gets smaller if you set the scale to below 100%

Kicad themselves recommend against wayland for now on their website. If you run the app with GDK_BACKEND=x11 it may work better.