https://bugs.kde.org/show_bug.cgi?id=387341

Alexander Schlarb <alexander-kde@ninetailed.ninja> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|DUPLICATE                   |UPSTREAM

--- Comment #18 from Alexander Schlarb <alexander-kde@ninetailed.ninja> ---
After some discussion on #368838 it turns out that this is a bug in the basic
render loop of the Qt Scene Graph component when interacting with MESA drivers,
that was fixed in Qt 5.9.4 and 5.10.0:

https://codereview.qt-project.org/#/c/200715/
https://codereview.qt-project.org/#/c/202781/

As a workaround one can start `plasmashell` with a different QSG render loop,
like this:

    QSG_RENDER_LOOP=threaded plasmashell

Unfortunately #368838 is not fixed by this.

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