Bug 505351 - Clicks can pass through below Xwayland windows, when specific monitor, scaling, and window position configurations are in use
Summary: Clicks can pass through below Xwayland windows, when specific monitor, scalin...
Status: REPORTED
Alias: None
Product: kwin
Classification: Plasma
Component: compositing (other bugs)
Version First Reported In: 6.3.5
Platform: Fedora RPMs FreeBSD
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords: multiscreen
Depends on:
Blocks:
 
Reported: 2025-06-08 17:33 UTC by Kat Pavlu
Modified: 2025-06-18 06:26 UTC (History)
1 user (show)

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Description Kat Pavlu 2025-06-08 17:33:29 UTC 
SUMMARY & CONDITIONS TO REPRODUCE
Conditions when this happens:
- Two monitors
- One monitor is at scale 1.1 (does not happen at scale 1.15 or 1.05) and thus shows up as smaller than the other in Display settings
- Monitors are ligned on their bottom edge (top or middle alignment does not have this issue)

When some apps are maximised or half/quarter tiled on the smaller monitor, clicking on the top row of pixels clicks "through" and interacts with the app below it instead. 

STEPS
- have maximised Gwenview open
- in front of that, quarter tile Steam to the top right quarter
- aligning your mouse with the top of the screen and clicking will raise/activate Gwenview.

Apps that can be clicked through in this way: Steam, Vivaldi

So i'm guessing this is something about Xwayland apps with client side decorations.

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 42
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0
Kernel Version: 6.14.9-300.fc42.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 8 × AMD Ryzen 7 PRO 3700U w/ Radeon Vega Mobile Gfx
Memory: 13.5 GiB of RAM
Graphics Processor: AMD Radeon Vega 10 Graphics
Manufacturer: LENOVO
Product Name: 20NKS52L02
System Version: ThinkPad T495
Comment 1 Kat Pavlu 2025-06-08 17:37:12 UTC 
Apps that cannot be clicked through this way: anything using KDE decorations, GNOME apps