[Bug 85064] Intel DRI3 causes extremely slow scrolling on certain pages with WebKitGTK+

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85064

--- Comment #24 from Martin Peres <martin.peres at free.fr> ---
(In reply to Michel Dänzer from comment #22)
> (In reply to Martin Peres from comment #21)
> > I tried using the modesetting driver and got absolute garbage out. Stale
> > rendering, extreme slowness. Why didn't I think of this before...
> > 
> > Anyway, will try to see if I can fix this issue. Seems like I will have a
> > happy time in glamor and mesa's code tomorrow.
> 
> Note that I couldn't reproduce this problem with xf86-video-ati using
> glamor. I guess the problem could be in the Mesa driver, but the modesetting
> driver seems more likely.

So, since the NVIDIA GTX 750 is not supported by Nouveau and the modesetting
driver is used instead, I decided to try it out only to find out it has the
exact same issue as Intel.

So, it not exactly rules out the possibility of a bug in mesa, but it is more
likely to be a bug in the modesetting driver. Time to check out its code, but
at least it is super easy to reproduce :)

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