https://bugs.kde.org/show_bug.cgi?id=510967

Conn O'Griofa <[email protected]> changed:

           What    |Removed                     |Added
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                 CC|                            |[email protected]

--- Comment #16 from Conn O'Griofa <[email protected]> ---
In case it helps, 6.5.0 -> 6.5.1 did fix direct scanout for the moonlight-qt
streaming client, but another open source application that still exhibits
direct scanout issues in 6.5.1 is Firefox in native wayland mode (but xwayland
mode seems to work OK).

Prerequisites:
* Enable showcompositing plugin in KWin
* In Firefox, ensure widget.wayland.fractional-scale.enabled is set to true via
about:config (normally needed for direct scanout to work if fractional scaling
is set by the system), otherwise all other config is set to default.

Procedure:
Test1: MOZ_ENABLE_WAYLAND=0 firefox https://www.google.com -> enter fullscreen
via F11 and wait for cursor to settle.
Test2: MOZ_ENABLE_WAYLAND=1 firefox https://www.google.com -> enter fullscreen
via F11 and wait for cursor to settle.
Test3: chromium https://www.google.com -> enter fullscreen via F11 and wait for
fullscreen notification to disappear.

Results:
Test1: direct scanout works
Test2: direct scanout does not work
Test3: direct scanout works (same for other chromium-based browsers such as
Chrome and Brave)

I believe that direct scanout was working fine in all of the above test cases
in Plasma 6.4.5 (as seen in the Fedora 43 KDE live iso, for example).

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