https://bugs.kde.org/show_bug.cgi?id=487479
Bug ID: 487479
Summary: Graphical glitches in dual monitor setup with
full-screen video player
Classification: Plasma
Product: kwin
Version: 6.0.4
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: dead...@dmu.gg
Target Milestone: ---
Created attachment 169776
--> https://bugs.kde.org/attachment.cgi?id=169776&action=edit
Example rendering issue
SUMMARY
In a dual display setup (may occur in more than 2), if a video player is full
screen on one display, such as MPV or YouTube full screened in a web browser,
windows and context menus experience graphical glitches on the other display.
This issue does not occur if a window is dragged onto the video, causing it to
render above the video.
See the attached video, where the following is depicted:
1. MPV is full-screened on the left display, with a window on the right display
2. Dragging the window around shows the graphical rendering errors
3. MPV is un-fullscreened down to a window
4. Dragging the window around no longer shows any issues
5. MPV, while still windowed, is played
6. Dragging the window around still does not show any issues
7. MPV is full-screened with the video still playing
8. Dragging the window around shows the rendering issues once again
STEPS TO REPRODUCE
1. On one display, play a video in full screen (using MPV or a web browser)
2. On the other display, right click to open a context menu, or drag a window
around
OBSERVED RESULT
Graphical glitches when rendering on the non-video display.
EXPECTED RESULT
No graphical glitches and smooth movement of windows/menus.
SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.0
Kernel Version: 6.9.1-arch1-2 (64-bit)
Graphics Platform: Wayland
Graphics Processor: AMD Radeon RX 7900 XT
ADDITIONAL INFORMATION
Not a recent bug, has been occurring for a while. This bug is not visible using
direct screen capture (e.g. screenshots or video recordings) and so may
potentially be a mesa bug?
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