Bug 452215 - Touching edge of screen can focus windows behind a fullscreen application
Summary: Touching edge of screen can focus windows behind a fullscreen application
Status: CONFIRMED
Alias: None
Product: kwin
Classification: Plasma
Component: general (show other bugs)
Version: 5.24.3
Platform: Fedora RPMs Linux
: NOR minor
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-04-03 07:06 UTC by Ash
Modified: 2022-04-04 21:21 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed In:

Attachments
Video showing touch and effect (3.04 MB, video/mp4)
2022-04-03 07:07 UTC, Ash 		Details
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Description Ash 2022-04-03 07:06:38 UTC 
SUMMARY
Touching the very edge of a touchscreen device can bring forward windows that are behind other, fullscreen windows, and are partially offscreen.

STEPS TO REPRODUCE
1. Open any application and move it so the window is partially offscreen.
2. Open a fullscreen-capable application (e.g. Firefox) and enter fullscreen (F11).
3. Touch the very edge of the screen, where your windowed application is overlapping it.

OBSERVED RESULT
The windowed application is focused.

EXPECTED RESULT
No applications switch focus and the fullscreen application responds to the touch.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora Linux 35
(available in About System)
KDE Plasma Version: 5.24.3
KDE Frameworks Version: 5.91.0
Qt Version: 5.15.2

ADDITIONAL INFORMATION
Tested on Wayland session with a HiDPI screen (2240x1400@150%)
Comment 1 Ash 2022-04-03 07:07:33 UTC 
Created attachment 147924 [details]
Video showing touch and effect
Comment 2 Nate Graham 2022-04-04 21:21:04 UTC 
Can reproduce. We're both on Wayland. This often happens for me when triggering an edge swipe.