[Bug 79888] SNA, regression: chromium UI sometimes doesn't redraw

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=79888

--- Comment #10 from Chris Wilson <chris at chris-wilson.co.uk> ---
Sigh.

Please try


diff --git a/src/sna/sna_dri2.c b/src/sna/sna_dri2.c
index efc790f..3d3c50d 100644
--- a/src/sna/sna_dri2.c
+++ b/src/sna/sna_dri2.c
@@ -1485,6 +1485,8 @@ can_xchg(struct sna * sna,
        WindowPtr win = (WindowPtr)draw;
        PixmapPtr pixmap;

+       return false;
+
        if (draw->type == DRAWABLE_PIXMAP)
                return false;

to disable xchg. If that is happening KDE is not unredirecting fullscreen
windows and there is a race between the compositor reading from a texture and
the GL app rendering it their fbo.

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