[Webkit-unassigned] [Bug 149060] [ThreadedCompositor] Scrolling artifacts on accelerated subframes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=149060

--- Comment #6 from Emanuele Aina <emanuele.aina at collabora.com> ---
I still see the page jumping badly when trying to scroll down https://people.collabora.com/~em/wk/tests/scroll.html

My steps (under X11):

* ./MiniBrowser https://people.collabora.com/~em/wk/tests/scroll.html
* move mouse pointer over the top iframe with the 300x300 image placeholder
* scroll down with a double-finger drag on my touchpad
* iframe scrolls correctly
* when the iframe has been scrolled completely, the scroll events propagate to the main frame, scrolling the page correctly
* if I keep scrolling down at some point the page goes back to its zero scrolling position

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