[kwin] [Bug 500371] New: In a dual-monitor setup on KDE Plasma (version X.Y.Z) under X11 (or Wayland), triggering the “Present Windows” effect on my primary monitor shows no window thumbnails, while on my secondary monitor the effect works as expected.

[James]

https://bugs.kde.org/show_bug.cgi?id=500371

            Bug ID: 500371
           Summary: In a dual-monitor setup on KDE Plasma (version X.Y.Z)
                    under X11 (or Wayland), triggering the “Present
                    Windows” effect on my primary monitor shows no window
                    thumbnails, while on my secondary monitor the effect
                    works as expected.
    Classification: Plasma
           Product: kwin
           Version: 6.3.0
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: effects-present-windows
          Assignee: kwin-bugs-n...@kde.org
          Reporter: jheine...@icloud.com
  Target Milestone: ---

STEPS TO REPRODUCE  
1. Set up two monitors with the primary monitor designated in System Settings.  
2. Open several windows on the primary monitor.  
3. Trigger the “Present Windows” effect (by pressing [key combination] or via
the screen edge).  

OBSERVED BEHAVIOR  
No windows from the primary monitor are rendered after triggering the effect,
while on the secondary monitor the windows are shown. Some minor visual
glitches can also be observed on the primary monitor.

EXPECTED BEHAVIOR  
The “Present Windows” effect should show all open windows on whichever monitor
it is activated on.

SOFTWARE/OS VERSIONS
Linux: Bazzite 41 (stable-41.20250216.2)
KDE Plasma Version: 6.3.0
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.2
Graphics Platform: Wayland

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