[Bug 55500] [sna gen4] corrupt rendering (and flickering on redraw)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=55500

--- Comment #83 from Zdenek Kabelac <zdenek.kabelac at gmail.com> ---
Created attachment 82118
  --> https://bugs.freedesktop.org/attachment.cgi?id=82118&action=edit
Video capture showing flicker on firefox scroll

I've captured at 25FPS some example how the pictures are flickering when i.e.
Firefox windows is being scrolled up/down. In most cases, the pictures is
visible normally when scrolling stops, but in rare case the picture stays non
viewable.  In this short video if you use i.e. mplayer '.'/step-by-step-frame
you could find 2 places where picture is broken.

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